You are right Stubby, the resisters just couldn't resist....LOL Last one that went bad was after dark and the operator saw flames shoot out from the screening that covers the grids. That had to be a cool sight to see! Very much appreciate your taking the time to visit with us and check out the video my friend.
In all of your videos I've seen and I've been watching over a year now, nothing is more dynamic than you, your attitude, your love for the railroad and the Cumberland mine and your special humor, dynamic should be your middle name. I love your spirit and your everything you do to support the railroad, you are a unique personality and I absolutely love you! Thank you for everything you do and God bless you.❤
300+ millions of years ago when today's coal was forests of vascular cryptogams (vascular = channels carrying sap and water; cryptogam = seedless -- but producing spores), maybe Dave was embodied as a dinosaur roaming the forest? That might explain his cheerful and motivated attitude in this embodiment...
Wow Donnie what a very kind thing to say, I'm blushing.....I'm very pleased to hear that you are having a good time with us. Your comment really has meant a lot to me tonight. Your certainly welcome and may you also have God's blessing on your life. I am a lucky man. Very much appreciate your taking the time to visit with us and check out the video my friend.
LOL.... I prefer to believe in a former life I worked for the Pennsylvania RR tho....:-) But who knows maybe I was a Tyrannosaurus Rex at one time......
Just like your Traction Motor Replacement video, you're showing me things I never thought I'd get a chance to see - AND with expert commentary! Love this stuff! Thanks, Dave.😊👍
Thank you Patrick for the very kind words. Glad you enjoyed the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
Well Dave, those are some mighty large toasters! Many thanks for showing us the inner workings of your motive power in this and other videos. Most people cannot understand why your followers find railroading in general and your videos in particular so fascinating, but we do! Many thanks. Ted
That's what Conrail called them Ted, toasters. Your welcome for showing this. And thank you for the kind words. Most folks never get to see the actual grids, all they see is the screening on the outside so was glad I was able to share a part of the loco no one usually gets to see. Very much appreciate your taking the time to visit with us and check out the video my friend.
Yes it is pretty neat to see what all goes on inside these locos, an interesting diversion from track work. Very much appreciate your taking the time to visit with us and check out the video my friend.
Very cool, Dave! I've never seen a resistor unit for dynamic brakes before! It's less complex than I had imagined. It's basically just a fin stack heat sink. Very cool, no pun intended! Looks like that one got hot enough to melt the solder out of it! Hope the new ones work out on old #1. #3098 sure is looking good!
@@philhoward4466 I agree with you, but, it should be regular maintenance like using compressed air and a blow gun to blow out coal dust periodically. It should not take eons to do so, when the engine is idling and the current is OFF you could do that. Just saying........
@@alro2434the solder could be made out of anything. Might even be braised with bronze or something like radiator cores used to be. I used "solder" as somewhat a generic term. Not really referring to the lead/tin mixture that we normally associate with the term. Although I would certainly like to know the materials used.
They look a lot like the big 'starting resistors' we had for DC propulsion motors aboard a ship I served on. Surprisingly, they don't have very high resistance (ours were just a bit under one ohm). BUT, they have a very high wattage rating. For starting the motors, they would have upwards of 400 kW for a few seconds. These resistors obviously have to handle a lot of heat for a lot longer. I doubt that what you see melted there is conventional 'solder'. If those plates crack or corrode they develop 'hot spots' and will melt the iron itself.
That grid shorted out pretty darn good. I hope it had a great big ground relay alarm bell ringing when the engineer put it in dynamics. If not, that should probably be checked out also. Have a great rest of your day Dave.
I don't know if it gave an alarm or not Ralfie, no one said. The last grid that went bad was after dark and the operator saw flames shoot out thru the screening, that had to be a cool sight to see! May you also have a great day. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you Rick for the really kind words. It does mean a lot to me to hear you say that. Really thoughtful of you to say that. Very much appreciate your taking the time to visit with us and check out the video my friend.
Well they say variety is the spice of life and you sure get plenty of variety Dave! Seems you're always on hand when needed and I have no doubt you love every minute of it...well most of the time 🙂 Keep those trains rolling!
Thank you Richard for the very kind words. Yes I do get involved in a whole lot of different stuff around here, but so does everyone else, it does make life interesting. Very much appreciate your taking the time to visit with us and check out the video my friend.
Dave i have to say i have never seen a person so happy to work, as my dad said find something you love to do and you will never have to work! Clearly you have found that!! No matter how shitty a day could be i laugh every time i watch your vids!! You’re like a jollly kid out there on the rails ! That’s railroading!
Thank you Kyle for the very kind words. I do have my days when I'm not so pleasant tho.... :-) But I'm glad you are enjoying. Very much appreciate your taking the time to visit with us and check out the video my friend.
One thing I have noticed about your operation is you have a very good team of people to work with. They seem like they can darn near fix anything. They really seem like they care, and that’s always a pleasure.
Thank you Jim for the kind words. Yes we have some pretty good folks here who try their best. The grids were put in by our contract mechanics and the guys we have now are superior! Very much appreciate your taking the time to visit with us and check out the video my friend.
That’s a beautiful new dynamic brake heat dissipator. I actually thought it was much bigger considering all the weight it has to deal with when braking. That lil thing is a marvel.
There are 3 of those grids on each side of the loco, one grid for each traction motor Bassotronics, so they apparently are adequate. Coal dust getting in there is not a good thing and all the coal dust was cleaned out before we put the new grids in. Very much appreciate your taking the time to visit with us and check out the video my friend.
Really pleased to hear that Jason. So glad to hear you enjoyed. Most folks never get to see the grids, they only see the outside screening and not whats underneath. Very much appreciate your taking the time to visit with us and check out the video my friend.
@@ccrx6700 your so right about that most people if they don't work in the mechanical department they don't know what they look like. I for one did not know what they looked like and I been an engineer for a good number of years. Keep up the good work my friend and can't wait for the next video.
Thank you darnolide for the nice comment, so pleased to hear you enjoyed it. Very much appreciate your taking the time to visit with us and check out the video my friend.
Really pleased to hear you enjoyed this one Lewis, not something most folks ever get to see, most just see the screen on the outside of the loco and never see what's underneath it. May you also have a great weekend. Very much appreciate your taking the time to visit with us and check out the video my friend.
Dave I'm not 100% sure on this, but I think these resistor banks are what supply the LOAD on the traction motors, creating the drag for braking. You are dumping a lot of amps from the motors into these resistors, making a lot of heat just like a toaster on steroids. I was a metalographer at ATI and analyzed some of the metal used for these ribbons. Can't for the life of me remember the grade of steel. This LOAD stuff is just like when you strike an arc on a gas powered welder, the arc LOAD bogs down the gas engine. The generator is loading down. braking the gas engine, the same way the loaded traction motors brake the engine.
You are right Richard, these are resisters and do exactly what you are saying, plus they dissipate the heat created, a pretty neat concept and how they work. Most folks never get to see the actual grids, all they see is the screening on the outside so was glad I was able to share a part of the loco no one usually gets to see. Very much appreciate your taking the time to visit with us and check out the video my friend.
Wow.. I’ve seen some large resistors in my time. But never one that big. That thing must be able to handle some serious power and dissipate some serious heat. Thanks for sharing.
They are big for sure and there is 3 of them on each side of the loco Wade. Appreciate very much your taking the time to write in and to check out the resistor grid show my friend.
You never have two days alike. You are wearing your hard work in the rain. The company is very blessed to have a hard worker you are. Thanks for sharing Maintenance video.
Thank you so much for the really kind words Beverly. I do get a lot of variety here and that is fine with me, it makes for an interesting experience. Very much appreciate your taking the time to visit with us and check out the video my friend.
I'm very glad you enjoyed it Mike. Thanks for the nice comment. May you also have a good weekend. Very much appreciate your taking the time to visit with us and check out the video my friend.
Loved the video! Slight clarification/expansion of what you said. As you said, when dynamic brakes are active the traction motors act as electrical generators. The current from them is sent over wires to the dynamic brakes which are large electrical resistors. These convert the electric current into heat. The energy in the locomotive's motion is converted by the traction motors into the electrical current; this creates "drag" and slows the train's motion. This is why dynamics are less effective at low speed, there's less energy (in the form of motion) available for the traction motors to harvest and sent to the resistors.
Really pleased to hear you enjoyed Alex. Thanks for the very good expansion on how the dynamics work! You are totally right in that. Very much appreciate your taking the time to visit with us and check out the video my friend.
That’s pretty interesting. I’ve never seen the traction belt? Like that. You learn something new everyday. I don’t fault your co-workers for not wanting to be in the video. People get fired for simple stuff these days and it’s not worth it. Thanks for making me smile!
yes, & I would not be thrilled to have tape rolling while I'm doing something big, tricky & dangerous like that. Sometimes you just don't need the slightest distraction.
You are certainly welcome David, glad you enjoyed the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
You are quite welcome Dan, so pleased to hear you are enjoying all the videos. Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and can't see inside that. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you so much Dave, really pleased to hear you enjoyed this one. The actual grids are not something most folks ever get to see. They just see the screening on the outside of the loco, so was glad I could share that with you. Very grateful for your taking the time to visit with us and check out the video my friend.
I'm sure it did get warm Jason. The last grid that went bad was after dark and the operator saw flames shoot out from the grids! That had to be a cool sight. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you so much Mike for the really nice comment. You are welcome and it was my pleasure. Very much appreciate your taking the time to visit with us and check out the video my friend.
You are quite welcome Derrick, so glad to hear you enjoyed. Very much appreciate your taking the time to visit with us and check out the video my friend.
You are certainly welcome Alan, glad you enjoyed the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
Always providing me with more knowledge! As a kid, I had a wonderful electric model train layout and would often fantasize about running the locomotive or being part of the operation. Your channel never fails to satisfy the desire that many of us had to work on the railroad.
Golly Jeff what a very nice comment. I got my first Lionel set in the early 1960's from Santa who the next year brought me a Santa Fe HO scale set so I understand about your fantasizing. Having that HO set taught me how to rerail cars....LOL I am very fortunate to be able to work here on the RR. Really pleased to hear you are enjoying the videos. Very much appreciate your taking the time to visit with us and check out the video my friend.
I'm guessing many heat cycles, and coal dust getting in the grid, creating hot spots, finally took its toll. Thanks for another informative video giving a glimpse into the make up of a locomotive Dave! Have a nice weekend my friend! 🚂🚃🚃🚃🚃🚃🚃💯👍🇺🇸
Yes, many cycles and I'd bet some tiny cracks formed. That made a 'high resistance' spot and the energy ends up concentrated there, overheating it and burning / melting the metal.
You are right about that Jim, a lot of use plus the coal dust sure doesn't help matters. All the coal was cleaned out before the new grids were put in. But it's impossible to keep the coal dust out with our operation. Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and can't see inside that. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thanks so much James for the nice comment. I will try my best to stay safe believe me. Very much appreciate your taking the time to visit with us and check out the video my friend.
I'm really pleased to hear that V1 VR. Glad you enjoyed the show. Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and can't see inside that. Very much appreciate your taking the time to visit with us and check out the video my friend.
Glad I could share something new with you Gary. Most folks never get to see the actual grids, all they see is the screening on the outside of the loco. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you for the very nice comment Eddy. So pleased to hear you enjoyed. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thanks for giving us another look inside. While I learned years ago HOW the dynamics work I had never seen one of the resistors and frankly hadn't thought about them burning out. That unit you showed us did look a little crispy, any idea about how long it had been in use?
I have no idea how long those grids have been in use Robert, but we seldom have to change them here. Coal dust getting in there sure doesn't help matters. All the coal dust was cleaned from the area before we put the grids in tho. Most folks never get to actually see the grids, all they see is the screening outside the loco. Very much appreciate your taking the time to visit with us and check out the video my friend.
@@ccrx6700Those things must be tough or you guys don't stress them as much as a Class One road would (NSs long, steep grades come to mind.) I'll bet the Engineers will notice a difference in performance like you would after you've had your truck brakes or transmission worked on. It's always a pleasure to check your postings.
Thank you Ian for the very nice comment. Everyone does there best around here to get the job done and that's great to have co workers like that. Our contract loco mechanics who did this job are superb, the best we've ever had. Very much appreciate your taking the time to visit with us and check out the video my friend.
Always wondered what those resistors looked like! They got hot! Amazing how much kinetic energy can be converted to heat in such a small unit. Those are some big bus bars!
Really pleased to hear you enjoyed the show modelenginerding. The last one that went bad was after dark and the operator saw flames shoot out from the grid! Bet that was a cool sight to see after dark. :-) Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and can't see inside that. Very much appreciate your taking the time to visit with us and check out the video my friend.
Your welcome Kevin, so pleased to hear you enjoyed the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
Yes they were John. Most folks never get to see the actual grids, all they see is the screening on the outside so was glad I was able to share a part of the loco no one usually gets to see. Very much appreciate your taking the time to visit with us and check out the video my friend.
Really glad to hear you enjoyed Tas. Thanks so much for the nice comment. Very much appreciate your taking the time to visit with us and check out the video my friend.
I hadn't noticed that Dave. Always good to buy local if you can. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thanks Dave love the Banter of the crew fixing those Toasters...glad to see America is still manufacturing stuff unlike here we make nothing any more kinda bad because we have all the raw resources but it dosnt seem to happen easier to sell them to someone else then buy them back less quality and more expensive...sorry for my rant got carried away...love your videos very enjoyable railroad stuff regards Doc from Down Under in Australia
Very grateful to hear you are enjoying the videos Doc. It really pleases me to hear you say that. yes it is good to still find stuff made in America and not made in China or Taiwan for these loco parts. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Hope you are doing well Alaina, been awhile since I've heard from you, good to see you again. These dynamic brake resister grids are not something very many folks ever get to see, all the see is the screening on the outside of the loco so was pleased to be able to share this with you. Very grateful my friend for your taking the time to check out the video.
That's what Conrail called them Poowg, toasters. Really pleased to hear your enjoyed the video, thanks so much for saying so, it does mean a lot to me. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Your quite welcome Charles, pleased to hear you enjoyed the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
You are always welcome Lawrie, so very pleased to hear you enjoyed this one. Most folks never get to see the actual grids, all they see is the screening on the outside so was glad I was able to share a part of the loco no one usually gets to see. Very much appreciate your taking the time to visit with us and check out the video my friend.
Hey, thanks for the educatio on the dynamic braking system , I love the fact that you’re having fun while you’re doing it. It’s great we need it out there.🚂🚂a Great Example God bless you!
Thank you Michael for the really nice comment. You are also quite welcome, so glad to hear you enjoyed. Very much appreciate your taking the time to visit with us and check out the video my friend.
Dave, we're always happy with the inside scoop that we get watching your production. Thanks for taking us along. God bless and have a wonderful weekend. 👍👍
Thank you Bradley for the very nice comment, pleased to hear you enjoyed this one. May you also have a great weekend. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you Darkknight for the nice comment. Glad you enjoyed. The mechanical parts of it have had a lot of good maintenance done to it since our new owners here took over, much needed and even tho the loco doesn't look real nice, it is running very well for the most part, which is most important. Very much appreciate your taking the time to visit with us and check out the video my friend.
Dave, you are close in your explanation of dynamic braking. True, when the motors are set-up in dynamic mode, they turn into generators. The resistance to or through the wheels/motors generates a lot of excess power which has to go someplace. Therefore the dynamic brake resister packs come into play. The unusable power from the wheel sets are directed into the resister packs, which then converts it into heat. A set up blowers dissipate heat into the surrounding air. This the simple wording on how it works, but overall, more is involved in this operation. Love your videos. Reminds me of my days/years in the engineer's seat!
Thank you innskin for the great comment. You are right. Really pleased to hear you are enjoying the videos! Very much appreciate your taking the time to visit with us and check out the video my friend.
You are quite welcome. Most folks never get to see the grids, they only see the outside screening and not whats underneath. Very much appreciate your taking the time to visit with us and check out the video my friend.
Not very many folks ever get to see the grids zalmaflash, they are behind the screening and that is what everyone sees. Glad I could share something new with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Remember Alex there are 3 of those grids on each side of the loco, one for each of the traction motors, so the smaller size is apparently adequate enough for them to work. Thanks so much for watching my friend.
@@ccrx6700 Ah, that makes a lot more sense. I thought all the traction motors on each truck were wired in parallel or something. Having one for each motor makes things much simpler (and more robust). BTW, I did the math and together they're generating nearly 1.7 MW of heat at maximum braking!
Very pleased that you enjoyed it Dennis. Not something most folks ever get to see is the grids. All they see is the screening on the outside of the loco. Appreciate very much the nice comment and for your watching the video my friend.
Very pleased to hear you enjoyed the show Mary. There is a lot to learn about trains and it's great that you are so interested in them. Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and can't see inside that. Very much appreciate your taking the time to visit with us and check out the video my friend.
You are certainly welcome 1208bug. Glad you enjoyed this one. Very much appreciate your taking the time to visit with us and check out the video my friend.
You are certainly welcome James, glad you liked the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
Hey Dave! As you know when the engine is going down hill and coasting the operator stops applying power to the DC drive Motor but because the rotors are still turning with voltage still applied to the fields, the motor turns into a generator! The operator can engage the DB or Dynamic Braking and That connects the DB resistors in parallel with motors or generator now and put a load on the motor/generator which will slow the engine down. I looked up the DB resistor and the rating is .86 ohms at 700 amps, the is over 400kw! That’s is a lot of power!! Thanks for the drive down memory lane! 35 + years ago I use to build DC drives system for coal mines, paper and steel mills.
I was going to clarify Dave's statement about how the resistive load on the generators (motors) causes them to slow down (i.e. braking), but you did a good job of explaining! That's a big resistor!! Did Dave mention my many resistive loads were used?
@@alexhajnal107 I was sort of thinking the same, one on the other side too. Maybe more, but in pairs (left, right). Wonder if it's one for each traction motor?
I love the description of Dynamic Braking. It's sort of correct from looking at things, but it's not how it truly works. Yes, the traction motors are used as generators, when dynamic braking (or regenerative braking)is used. The difference is the power circuit is removed (switched/disconnected by relays most likely), and connected to the massive resistor they just replaced. Energy from the rolling train is turned into electricity by the traction motors (with magnetic etc,), then the resistor bank resists the electricity being feed into them, requiring more 'energy' to be used to turn the traction motors, slowing down the train. The resistor bank is turning the electricity into to heat, that then needs to be removed to stop the resistor from melting. Each use of the Dynamic Brakes heats and oxidise the resistors, making the resistors less able to dissipate the heat. Thus the resistors have a life span, like even thing else on the SD38-2. Now regenerative braking uses the same idea and in newer trains and cars the electricity is stored in batteries. So it works like this Energy from the rolling train is turned into electricity by the traction motors (with magnetic etc,), then the batteries stores the electricity being feed into them, requiring more 'energy' to be used to turn the traction motors. This stored energy (in the form of electricity) can be later use to power the traction motors. I know I most likely have wording wrong, as I learnt this at Uni 30 years ago.
Excellent description of how it works OzyWizard, you are correct. Thank you so much for sharing your knowledge with us. Very much appreciate your taking the time to visit with us and check out the video my friend.
I do know that the last time one went bad a few months ago the operator said he saw fire shoot out from one of them Wayne! Glad you enjoyed and you are certainly welcome. Very much appreciate your taking the time to visit with us and check out the video my friend.
Your quite welcome Robin. Yes it is expensive but these locos do a ton of work also. Very much appreciate your taking the time to visit with us and check out the video my friend.
Oh wow! With my smithing knowledge, I know to burn metal like that you need a really hot fire, like 1500-2k degrees (lots of experience with burning steel in a coal forge, unfortunately 😅) dynamic braking really must be smokin' hot! Loved the look at the old vs. new heat dispensers, loved the purr of the diesel engines too! Appreciate the rare peek into engine maintenance! Thank you😊
Thank you Jennifer for the really nice comment. Last grid that went bad was at night and the operator said he saw fire shoot out from that grid! That's hot. Very much appreciate your taking the time to visit with us and check out the video my friend.
That's pretty interesting to hear adaptolife. I'm not sure where these were made at, but believe it was somewhere in the US. Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco, so was glad I was able to share this with everyone. Very much appreciate your taking the time to check out the video and write in my friend.
Great documentation once again Dave and it was so nice coming back out to visit last week. Right when I seen your face I knew what you must have been doing without you even say anything. I used to get that way when spiking around mud spots along the RR. Have a wonderul Friday.(Steve)
Thank you Steve for the very nice comment. Glad you enjoyed the show, it was a good day for sure we had. Very much appreciate your taking the time to visit with us and check out the video my friend.
Very pleased to hear you enjoyed this one texaswonderer. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Very pleased to hear you enjoyed the show David. Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and can't see inside that. Very much appreciate your taking the time to visit with us and check out the video my friend.
Very grateful to hear you enjoyed this one Bigmack. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Really do appreciate your taking the time to visit with us and check out the video my friend.
Thank you very much Brian, so pleased to hear you enjoyed this one. We don't often replace those grids thank goodness. Was glad I could share this, most folks never get to see what the actual grids look like, they only see the screening on the outside. So very grateful for your taking the time to visit with us and check out the video my friend.
Thank you so much Neal for the really nice comment. So pleased to hear you are enjoying the shows. Very much appreciate your taking the time to visit with us and check out the video my friend.
A wonderful entertainment video... let's not forget about the "EDUCATION" value. Your new owners are truly going all out for the company👍💪🚂❗ Looking at the 2 locos, the one getting the new Dynamic Brake Grids sure could use a paint job. is this in "Her" future❓
No paint job in the near future Captain Tom, it does get steam cleaned once in awhile tho. Glad you enjoyed watching this one. Not something very many folks ever get to see, all they see is the screening on the outside. So was glad I could share that with you. Very grateful my friend for your taking the time to visit with us and check out the video.
Thank you very much JG for the nice comment, am very grateful to hear you enjoyed this one. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Big toaster Doug. I was told Conrail used to call these grids toasters. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you so much for saying so Kathie. Really pleased to hear you enjoyed this one. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you Richard, really pleased to hear you enjoyed this one. I will try my best to keep good content coming your way. It's a lot of fun to make these. Very much appreciate your taking the time to visit with us and check out the video my friend.
Your quite welcome akhtarkh. Pleased to hear you enjoyed this one. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Hi Dave, Nice, it is interesting to see the workings of a locomotive. Yes, those resistors do the same job the bakes on a vehicle. Need them for going downhill. The plates are stainless steel, so they last as long as the coal dust lets them. We used some similar ones on rail dumpers that roll the cars over to empty them when delivering coal to the power stations or lime to the cement plants, huge amount of energy recovered during the roll back with an empty car as the mass is all on the side where the wheel trucks are. Also, the first time those get to do their job from new there's a huge cloud of smoke as dust and other stuff on the plates burns off when they heat up for the first time. Kind regards, Duncan
Thank you for sharing that Duncan. You are right, coal dust on them is hard on those plates. Appreciate very much your taking the time to visit with us and may you have a very good day my friend.
Thanks. The Mosebach company in Pittsburgh made them, also has offices in Greensburg, Johnstown, Altoona & others in coal country, couldn't get the price for that part number. If the locomotive had a bank of battery's to drive the wheels, the Dynamic Brake energy could charge'em back up instead of wasting it by heating up those big resistance wire/ribbon toasters. Don't know if coal is an electrical conductor, but with some blocking the airflow it sure wouldn't like it. Must be undersized to need airflow else it melts!
Anthracite coal is more than 80% carbon, which is a good conductor of electricity. So besides blocking the airflow thru the grid, the build-up of coal dust is likely to short out sections also.
Thanks for sharing that Alro, I didn't know that info. Interesting. When the current is fed to charge batteries or an electric line for electric trains, that is called regenerative braking. Coal in the grids is not a good thing, but we can't help it getting in there, all the coal dust was cleaned from the area before we put then new grids in. Very much appreciate your taking the time to visit with us and check out the video my friend.
Yes it is, I do doubt that a color selection was available tho stradplayer. It just happened to come that way. Very much appreciate your taking the time to visit with us and check out the video my friend.
You are certainly welcome Tony. Very pleased to hear you enjoyed this one. Very much appreciate your taking the time to visit with us and check out the video my friend.
You are certainly welcome Charlie. Glad you enjoyed the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you, for another interesting video. The burned out parts looked original and maybe the manufacturer would cover the replacement on warranty a claim 😂. We need you out here in Boston, looking into the mess on the MBTA Greenline. Situation is track width, that after a replacement project was completed it was found to be knowingly narrow. You take proper care of coal haulers and peoples lives are at stake here, oh my. Incompetence abounds in the glorious state of Taxachusetts. 😊. Cheers to you till we meet again.
I've heard it called Taxachusetts before, graduated with a girl who now lives there EJ and the last time I was talking to her that's what she said. Glad you enjoyed this video. Hard to believe that during a track replacement the gage was left narrow, that's just about as bad as wide gage. Hard on train wheels is narrow gage plus track fasteners. Easy to have wheel climb on curves also. I have no idea how long those grids had been in there, but it is not very often that we replace them. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you noneshere, pleased to hear you enjoyed the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
Coal dust is not good for the grids for sure Glenn. But we just can't help it getting in there with what we do here. They are never cleaned as a routine maintenance thing, but at least the coal dust was cleaned out before the new grids were put back in. May you have a good week also. Very much appreciate your taking the time to visit with us and check out the video my friend.
Really glad to hear that Terry, glad you found out something new. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you Mrfingerlakes, I'm very grateful for having you say that, it does mean a lot of me to hear it from you. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
So glad to hear you enjoyed Daniel. Most folks never get to see the grids, they only see the outside screening and not whats underneath. Very much appreciate your taking the time to visit with us and check out the video my friend.
Several years ago I was able to tour the Knor brake facility in Westminster, MD with other electricians in the county association about a yr after it opened
Yes they certainly were, coal dust in them is hard on those grids, but we can't help the dust getting in there. Coal was all cleaned out before we put the new grids in tho. Glad you found out something new. Most folks never get to actually see what the grids look like they are hiding behind the screening. Very much appreciate your taking the time to visit with us and check out the video my friend.
Most people never get to see the resister grids Charles, they are hiding behind the screening and can't see what they look like. The grids create resistance to the electric current which slows the traction motors, now generators down, creates a dragging effect. Glad you enjoyed. Very much appreciate your taking the time to visit with us and check out the video my friend.
There is no need to apologize about the soot on your face. At least you are making some contributions to America. I remember that the resistors underneath the [electric] New York City railcars or subway cars have been formally called "rheostats," in the Road Car Inspector manual. The dynamic brakes work as a combination of electric brake and pneumatic (airbrakes). Long ago, I was told that when the controller is switched off, the traction motors rotate in the opposite direction to cause a "slow-up" of the train, and a slight amount of airbrake is added during dynamic braking. The electric brake slows up the train and sends braking impulses to the other railcars, trainline. I have always wanted to learn how a locomotive works, and I am willing to learn more.💙
That is very interesting to find out about the air brakes working with the dynamics on those Captain Keyboard, I did not know that. We have the option to use independent brakes on the loco while in dynamics but they are not applied normally as part of the dynamic braking process. Thanks so much for sharing that with me my friend!
@@ccrx6700 Well, you think on high, while I speak on "low." I believe that freight trains are more powerful and advanced than many electrified passenger trains. Thank you for typing to me. Bright Rails and Happy Railroading!👍🚂
Your welcome Dale, so pleased to hear you are enjoying the videos and you are finding out some new things. Very much appreciate your taking the time to visit with us and check out the video my friend.
They didn't _want_ to fail, but eventually they just couldn't resist.
You are right Stubby, the resisters just couldn't resist....LOL Last
one that went bad was after dark and the operator saw flames shoot
out from the screening that covers the grids. That had to be a cool
sight to see! Very much appreciate your taking the time to visit with us and check out the video my friend.
In all of your videos I've seen and I've been watching over a year now, nothing is more dynamic than you, your attitude, your love for the railroad and the Cumberland mine and your special humor, dynamic should be your middle name. I love your spirit and your everything you do to support the railroad, you are a unique personality and I absolutely love you! Thank you for everything you do and God bless you.❤
Amen!
Such a happy guy to
300+ millions of years ago when today's coal was forests of vascular cryptogams (vascular = channels carrying sap and water; cryptogam = seedless -- but producing spores), maybe Dave was embodied as a dinosaur roaming the forest? That might explain his cheerful and motivated attitude in this embodiment...
Wow Donnie what a very kind thing to say, I'm blushing.....I'm very pleased to hear that you are having a good time with us. Your
comment really has meant a lot to me tonight. Your certainly
welcome and may you also have God's blessing on your life. I
am a lucky man. Very much appreciate your taking the time
to visit with us and check out the video my friend.
LOL.... I prefer to believe in a former life I worked for the Pennsylvania
RR tho....:-) But who knows maybe I was a Tyrannosaurus Rex at
one time......
Just like your Traction Motor Replacement video, you're showing me things I never thought I'd get a chance to see - AND with expert commentary! Love this stuff! Thanks, Dave.😊👍
Thank you Patrick for the very kind words. Glad you enjoyed the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
Well Dave, those are some mighty large toasters! Many thanks for showing us the inner workings of your motive power in this and other videos. Most people cannot understand why your followers find railroading in general and your videos in particular so fascinating, but we do! Many thanks. Ted
That's what Conrail called them Ted, toasters. Your welcome for showing this. And thank you for the kind words. Most folks never get to see the actual grids, all they see is the screening on the outside so was glad I was able to share a part of the loco no one usually gets to see. Very much appreciate your taking the time to visit with us and check out the video my friend.
Being just a simple track guy, I like seeing the inner workings of the locomotives 👍
Yes it is pretty neat to see what all goes on inside these locos,
an interesting diversion from track work. Very much appreciate
your taking the time to visit with us and check out the video my friend.
Very cool, Dave! I've never seen a resistor unit for dynamic brakes before! It's less complex than I had imagined. It's basically just a fin stack heat sink. Very cool, no pun intended! Looks like that one got hot enough to melt the solder out of it! Hope the new ones work out on old #1. #3098 sure is looking good!
i think it shorted out from an accumulation of coal dust. if this happens too often, better filters should help.
@@philhoward4466 I agree with you, but, it should be regular maintenance like using compressed air and a blow gun to blow out coal dust periodically. It should not take eons to do so, when the engine is idling and the current is OFF you could do that. Just saying........
What's used for resistance besides tungsten, like light bulb& space heater stuff? Way hotter melting point then solder for sure.
@@alro2434the solder could be made out of anything. Might even be braised with bronze or something like radiator cores used to be. I used "solder" as somewhat a generic term. Not really referring to the lead/tin mixture that we normally associate with the term. Although I would certainly like to know the materials used.
They look a lot like the big 'starting resistors' we had for DC propulsion motors aboard a ship I served on. Surprisingly, they don't have very high resistance (ours were just a bit under one ohm). BUT, they have a very high wattage rating. For starting the motors, they would have upwards of 400 kW for a few seconds. These resistors obviously have to handle a lot of heat for a lot longer.
I doubt that what you see melted there is conventional 'solder'. If those plates crack or corrode they develop 'hot spots' and will melt the iron itself.
That grid shorted out pretty darn good. I hope it had a great big ground relay alarm bell ringing when the engineer put it in dynamics. If not, that should probably be checked out also.
Have a great rest of your day Dave.
Looks like an open circuit when it melts away.
I don't know if it gave an alarm or not Ralfie, no one said. The last
grid that went bad was after dark and the operator saw flames
shoot out thru the screening, that had to be a cool sight to see!
May you also have a great day. Very much appreciate your
taking the time to visit with us and check out the video my friend.
@@ccrx6700
I’ve seen them melt down also, it looks like lava falling on the walkway!
@@ralfie8801 wow 👍😊
Check for "bird-caged" traction motors...
The man is out spiking track in the pouring rain… and he apologizes for the dirt on his face… that’s called class. Thanks, Dave!
Thank you Rick for the really kind words. It does mean a lot to me
to hear you say that. Really thoughtful of you to say that. Very much appreciate your taking the time to visit with us and check out the video my friend.
Well they say variety is the spice of life and you sure get plenty of variety Dave! Seems you're always on hand when needed and I have no doubt you love every minute of it...well most of the time 🙂 Keep those trains rolling!
Thank you Richard for the very kind words. Yes I do get involved
in a whole lot of different stuff around here, but so does
everyone else, it does make life interesting. Very much appreciate
your taking the time to visit with us and check out the video my friend.
Dave i have to say i have never seen a person so happy to work, as my dad said find something you love to do and you will never have to work! Clearly you have found that!! No matter how shitty a day could be i laugh every time i watch your vids!! You’re like a jollly kid out there on the rails ! That’s railroading!
Thank you Kyle for the very kind words. I do have my days when I'm
not so pleasant tho.... :-) But I'm glad you are enjoying. Very much appreciate your taking the time to visit with us and check out the video my friend.
One thing I have noticed about your operation is you have a very good team of people to work with. They seem like they can darn near fix anything. They really seem like they care, and that’s always a pleasure.
Thank you Jim for the kind words. Yes we have some pretty good
folks here who try their best. The grids were put in by our contract
mechanics and the guys we have now are superior! Very much appreciate your taking the time to visit with us and check out the video my friend.
That’s a beautiful new dynamic brake heat dissipator. I actually thought it was much bigger considering all the weight it has to deal with when braking. That lil thing is a marvel.
There are 3 of those grids on each side of the loco, one grid for
each traction motor Bassotronics, so they apparently are
adequate. Coal dust getting in there is not a good thing and
all the coal dust was cleaned out before we put the new grids in.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Very dynamic
LOL Yep Arkay you are right about that! Very much appreciate
your taking the time to visit with us and check out the video my friend.
You are the best railroader I know, Dave. Keep it up!!!
Thank you Lester for the very kind words. Very much appreciate
your taking the time to visit with us and check out the video my friend.
Dave I always learn something new watching your videos.
Really pleased to hear that Jason. So glad to hear you enjoyed. Most folks never get to see the grids, they only see the outside screening and not whats underneath. Very much appreciate your taking the time to visit with us and check out the video my friend.
@@ccrx6700 your so right about that most people if they don't work in the mechanical department they don't know what they look like. I for one did not know what they looked like and I been an engineer for a good number of years. Keep up the good work my friend and can't wait for the next video.
@jasonoliver5388 👍😊 thank you Jason
Now that was most interesting Dave. As always. Thanks for coming up with interesting content video after video.
Thank you darnolide for the nice comment, so pleased to hear
you enjoyed it. Very much appreciate your taking the time to visit with us and check out the video my friend.
Wow another new piece of equipment I would never expect to see. Have a great weekend my friend.
Really pleased to hear you enjoyed this one Lewis, not something
most folks ever get to see, most just see the screen on the outside
of the loco and never see what's underneath it. May you also have
a great weekend. Very much appreciate your taking the time to visit with us and check out the video my friend.
Dave I'm not 100% sure on this, but I think these resistor banks are what supply the LOAD on the traction motors, creating the drag for braking. You are dumping a lot of amps from the motors into these resistors, making a lot of heat just like a toaster on steroids. I was a metalographer at ATI and analyzed some of the metal used for these ribbons. Can't for the life of me remember the grade of steel. This LOAD stuff is just like when you strike an arc on a gas powered welder, the arc LOAD bogs down the gas engine. The generator is loading down. braking the gas engine, the same way the loaded traction motors brake the engine.
You are right Richard, these are resisters and do exactly what you
are saying, plus they dissipate the heat created, a pretty neat concept
and how they work. Most folks never get to see the actual grids,
all they see is the screening on the outside so was glad I was able
to share a part of the loco no one usually gets to see. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thanks Dave for your reply. Got to say that your channel is probably my favorite. No drama and no stress on me. Good job and thanks Dave!@@ccrx6700
Wow.. I’ve seen some large resistors in my time. But never one that big. That thing must be able to handle some serious power and dissipate some serious heat. Thanks for sharing.
They are big for sure and there is 3 of them on each side of the loco
Wade. Appreciate very much your taking the time to write in and to check out the resistor grid show my friend.
You never have two days alike. You are wearing your hard work in the rain. The company is very blessed to have a hard worker you are. Thanks for sharing Maintenance video.
Thank you so much for the really kind words Beverly. I do get a
lot of variety here and that is fine with me, it makes for an interesting
experience. Very much appreciate your taking the time to visit
with us and check out the video my friend.
Another informative video... thanks Dave. Hope that you and the wife have a great weekend!
I'm very glad you enjoyed it Mike. Thanks for the nice comment.
May you also have a good weekend. Very much appreciate your taking the time to visit with us and check out the video my friend.
Loved the video! Slight clarification/expansion of what you said. As you said, when dynamic brakes are active the traction motors act as electrical generators. The current from them is sent over wires to the dynamic brakes which are large electrical resistors. These convert the electric current into heat. The energy in the locomotive's motion is converted by the traction motors into the electrical current; this creates "drag" and slows the train's motion. This is why dynamics are less effective at low speed, there's less energy (in the form of motion) available for the traction motors to harvest and sent to the resistors.
Really pleased to hear you enjoyed Alex. Thanks for the very good
expansion on how the dynamics work! You are totally right in that. Very much appreciate your taking the time to visit with us and check out the video my friend.
WOW WOW WOW,,IDK THEY RAN RESISTORS,WOW THAT BIG..THANK YOU DAVE..
apparently a lot of power turned into heat in there.
They are pretty big aren't they Ralph! Conrail used to call them toasters :-)
L0L@@ccrx6700
That’s pretty interesting. I’ve never seen the traction belt? Like that. You learn something new everyday. I don’t fault your co-workers for not wanting to be in the video. People get fired for simple stuff these days and it’s not worth it. Thanks for making me smile!
yes, & I would not be thrilled to have tape rolling while I'm doing something big, tricky & dangerous like that. Sometimes you just don't need the slightest distraction.
@@ajknaup3530Perhaps go hide in the office then.
You are certainly welcome David, glad you enjoyed the show.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Thanks for the video. I learn a little more about railroading, everytime. I watch
You are quite welcome Dan, so pleased to hear you are enjoying all the videos. Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and
can't see inside that. Very much appreciate your taking the time
to visit with us and check out the video my friend.
Fascinating video Dave, I thoroughly enjoyed it!
Thank you so much Dave, really pleased to hear you enjoyed this one.
The actual grids are not something most folks ever get to see. They
just see the screening on the outside of the loco, so was glad I
could share that with you. Very grateful for your taking the time to
visit with us and check out the video my friend.
Looks like something got a bit warm!!!!! Glad yall got it switched out and back working. Very important component for sure
I'm sure it did get warm Jason. The last grid that went bad was
after dark and the operator saw flames shoot out from the grids!
That had to be a cool sight. Very much appreciate your taking the time to visit with us and check out the video my friend.
Very interesting and informative thank you for sharing and have some safe and blessed railroading
Thank you so much Mike for the really nice comment. You are welcome and it was my pleasure. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you for sharing Great Video.
You are quite welcome Derrick, so glad to hear you enjoyed.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Great content, Dave! As always, thank you.
You are certainly welcome Alan, glad you enjoyed the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
Always providing me with more knowledge! As a kid, I had a wonderful electric model train layout and would often fantasize about running the locomotive or being part of the operation. Your channel never fails to satisfy the desire that many of us had to work on the railroad.
Golly Jeff what a very nice comment. I got my first Lionel set in
the early 1960's from Santa who the next year brought me a Santa Fe
HO scale set so I understand about your fantasizing. Having that
HO set taught me how to rerail cars....LOL I am very fortunate to
be able to work here on the RR. Really pleased to hear you are
enjoying the videos. Very much appreciate your taking the time to visit with us and check out the video my friend.
I'm guessing many heat cycles, and coal dust getting in the grid, creating hot spots, finally took its toll. Thanks for another informative video giving a glimpse into the make up of a locomotive Dave! Have a nice weekend my friend!
🚂🚃🚃🚃🚃🚃🚃💯👍🇺🇸
Yes, many cycles and I'd bet some tiny cracks formed. That made a 'high resistance' spot and the energy ends up concentrated there, overheating it and burning / melting the metal.
Looks like it
@@mikefochtman7164snowball effect
You are right about that Jim, a lot of use plus the coal dust
sure doesn't help matters. All the coal was cleaned out before
the new grids were put in. But it's impossible to keep the coal
dust out with our operation. Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and can't see inside that. Very much appreciate your taking the time to visit with us and check out the video my friend.
Looking like a working man! Stay safe Dave!
Thanks so much James for the nice comment. I will try my best
to stay safe believe me. Very much appreciate your taking the time to visit with us and check out the video my friend.
We rail fans appreciate this video...
I'm really pleased to hear that V1 VR. Glad you enjoyed the show.
Most folks never get to see what the grids actually look like,
all they see is the screening on the outside of the loco body and
can't see inside that. Very much appreciate your taking the time
to visit with us and check out the video my friend.
Always wondered how the heat was dissipated from the reverse voltage/amperage! Thanks Dave!
Glad I could share something new with you Gary. Most folks never
get to see the actual grids, all they see is the screening on the
outside of the loco. Very much appreciate your taking the time to visit with us and check out the video my friend.
Great vid Dave & great info ... Those SD 40's are so beautiful & my favorite ... Thx
Thank you for the very nice comment Eddy. So pleased to hear
you enjoyed. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thanks for giving us another look inside. While I learned years ago HOW the dynamics work I had never seen one of the resistors and frankly hadn't thought about them burning out. That unit you showed us did look a little crispy, any idea about how long it had been in use?
I have no idea how long those grids have been in use Robert, but
we seldom have to change them here. Coal dust getting in there
sure doesn't help matters. All the coal dust was cleaned from the
area before we put the grids in tho. Most folks never get to actually
see the grids, all they see is the screening outside the loco. Very much appreciate your taking the time to visit with us and check out the video my friend.
@@ccrx6700Those things must be tough or you guys don't stress them as much as a Class One road would (NSs long, steep grades come to mind.) I'll bet the Engineers will notice a difference in performance like you would after you've had your truck brakes or transmission worked on. It's always a pleasure to check your postings.
@@robertf3479 👍😊
Proper railway you have there Dave with everyone mucking in to get the job done
Thank you Ian for the very nice comment. Everyone does there best
around here to get the job done and that's great to have co workers
like that. Our contract loco mechanics who did this job are superb,
the best we've ever had. Very much appreciate your taking the time to visit with us and check out the video my friend.
Always wondered what those resistors looked like! They got hot! Amazing how much kinetic energy can be converted to heat in such a small unit. Those are some big bus bars!
Really pleased to hear you enjoyed the show modelenginerding.
The last one that went bad was after dark and the operator saw
flames shoot out from the grid! Bet that was a cool sight to see
after dark. :-) Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and
can't see inside that. Very much appreciate your taking the time
to visit with us and check out the video my friend.
@@ccrx6700 We appreciate your insight. Hoping my sons will have a mentor like you when they enter the workplace.
@@modelenginerding6996 👍😎 thank you
Very interesting video.
Thanks for posting.
Your welcome Kevin, so pleased to hear you enjoyed the show.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Those grids were really destroyed! I have never seen these units before now so thanks for sharing this.
Yes they were John. Most folks never get to see the actual grids,
all they see is the screening on the outside so was glad I was able
to share a part of the loco no one usually gets to see. Very much appreciate your taking the time to visit with us and check out the video my friend.
That is one sweet locomotive! Glad to see it still is used as a work hoarse! Love that sound. EMD645 16! Nice video! Thanks!
Really glad to hear you enjoyed Tas. Thanks so much for the nice
comment. Very much appreciate your taking the time to visit with us and check out the video my friend.
Very excited to see the Grids are from Pittsburgh, Pa!
I hadn't noticed that Dave. Always good to buy local if you can.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Thanks Dave love the Banter of the crew fixing those Toasters...glad to see America is still manufacturing stuff unlike here we make nothing any more kinda bad because we have all the raw resources but it dosnt seem to happen easier to sell them to someone else then buy them back less quality and more expensive...sorry for my rant got carried away...love your videos very enjoyable railroad stuff regards Doc from Down Under in Australia
Very grateful to hear you are enjoying the videos Doc. It really pleases
me to hear you say that. yes it is good to still find stuff made in
America and not made in China or Taiwan for these loco parts.
Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Nice to watch your videos again Dave.
Hope you are doing well Alaina, been awhile since I've heard from
you, good to see you again. These dynamic brake resister grids
are not something very many folks ever get to see, all the see is
the screening on the outside of the loco so was pleased to be
able to share this with you. Very grateful my friend for your
taking the time to check out the video.
Big toaster. Great video, thanks Dave!
That's what Conrail called them Poowg, toasters. Really pleased
to hear your enjoyed the video, thanks so much for saying so,
it does mean a lot to me. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Very cool, thanks for sharing.
Your quite welcome Charles, pleased to hear you enjoyed the show.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Another fantastic vid Dave thank you .
You are always welcome Lawrie, so very pleased to hear you enjoyed
this one. Most folks never get to see the actual grids, all they see is the screening on the outside so was glad I was able to share a part of the loco no one usually gets to see. Very much appreciate your taking the time to visit with us and check out the video my friend.
HELLO FROM TEXAS as always!
Good to have you join in with us again JTG. Very much appreciate your taking the time to visit with us and check out the video my friend.
Hey, thanks for the educatio on the dynamic braking system , I love the fact that you’re having fun while you’re doing it. It’s great we need it out there.🚂🚂a Great Example God bless you!
Thank you Michael for the really nice comment. You are also quite
welcome, so glad to hear you enjoyed. Very much appreciate your taking the time to visit with us and check out the video my friend.
Dave, we're always happy with the inside scoop that we get watching your production. Thanks for taking us along. God bless and have a wonderful weekend. 👍👍
Thank you Bradley for the very nice comment, pleased to hear
you enjoyed this one. May you also have a great weekend. Very much appreciate your taking the time to visit with us and check out the video my friend.
great job as always, need to give that EMD SD SD38-2 some love
Thank you Darkknight for the nice comment. Glad you enjoyed.
The mechanical parts of it have had a lot of good maintenance
done to it since our new owners here took over, much needed and
even tho the loco doesn't look real nice, it is running very well for
the most part, which is most important. Very much appreciate your taking the time to visit with us and check out the video my friend.
Dave, you are close in your explanation of dynamic braking.
True, when the motors are set-up in dynamic mode, they turn into generators. The resistance to or through the wheels/motors generates a lot of excess power which has to go someplace.
Therefore the dynamic brake resister packs come into play. The unusable power from the wheel sets are directed into the resister packs, which then converts it into heat. A set up blowers dissipate heat into the surrounding air.
This the simple wording on how it works, but overall, more is involved in this operation.
Love your videos. Reminds me of my days/years in the engineer's seat!
Thank you innskin for the great comment. You are right. Really pleased to hear you are enjoying the videos! Very much appreciate your taking the time to visit with us and check out the video my friend.
Thankyou Dave 🎉
You are quite welcome. Most folks never get to see the
grids, they only see the outside screening and not whats underneath.
Very much appreciate your taking the time to visit with us and check out the video my friend.
I know what dynamic braking is but it was nice to see the heat sinks. Bigger than I expected. Thanks Dave.
I actually expected them to be much larger. I bet they run very hot!
Not very many folks ever get to see the grids zalmaflash, they
are behind the screening and that is what everyone sees. Glad
I could share something new with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Remember Alex there are 3 of those grids on each side of the loco,
one for each of the traction motors, so the smaller size is apparently
adequate enough for them to work. Thanks so much for watching
my friend.
@@ccrx6700 Ah, that makes a lot more sense. I thought all the traction motors on each truck were wired in parallel or something. Having one for each motor makes things much simpler (and more robust). BTW, I did the math and together they're generating nearly 1.7 MW of heat at maximum braking!
@@alexhajnal107 👍😊 thank you Alex
Great Video Dave, Thanks for sharing
Thank you Marty for the very kind words. Very much appreciate
your taking the time to visit with us and check out the video my friend.
Cool video Dave. Thanks for giving us an inside look at all things that goes on in your Railroading. That looked like a crispy critter! 🤣
Very pleased that you enjoyed it Dennis. Not something most folks
ever get to see is the grids. All they see is the screening on the
outside of the loco. Appreciate very much the nice comment and
for your watching the video my friend.
Enjoyed it, thanks Dave
Glad to hear you enjoyed the show Tom. Very much appreciate your taking the time to visit with us and check out the video my friend.
That was interesting. I like learning about the technical side of things. And trains are my favorite!
Very pleased to hear you enjoyed the show Mary. There is a lot to
learn about trains and it's great that you are so interested in them.
Most folks never get to see what the grids actually look like,
all they see is the screening on the outside of the loco body and
can't see inside that. Very much appreciate your taking the time
to visit with us and check out the video my friend.
Thanks Dave, always interesting!
You are certainly welcome 1208bug. Glad you enjoyed this one.
Very much appreciate your taking the time to visit with us and check out the video my friend.
I never knew how that worked now I do .Thank you.
You are certainly welcome James, glad you liked the show. Very much appreciate your taking the time to visit with us and check out the video my friend.
Hey Dave! As you know when the engine is going down hill and coasting the operator stops applying power to the DC drive Motor but because the rotors are still turning with voltage still applied to the fields, the motor turns into a generator!
The operator can engage the DB or Dynamic Braking and That connects the DB resistors in parallel with motors or generator now and put a load on the motor/generator which will slow the engine down.
I looked up the DB resistor and the rating is .86 ohms at 700 amps, the is over 400kw! That’s is a lot of power!!
Thanks for the drive down memory lane! 35 + years ago I use to build DC drives system for coal mines, paper and steel mills.
I was going to clarify Dave's statement about how the resistive load on the generators (motors) causes them to slow down (i.e. braking), but you did a good job of explaining!
That's a big resistor!! Did Dave mention my many resistive loads were used?
The traction motor run at a nominal 600 VDC.
@@Mark-hb5zf Seems like two loads, one one each side of the fan.
@@alexhajnal107 I was sort of thinking the same, one on the other side too. Maybe more, but in pairs (left, right). Wonder if it's one for each traction motor?
@@Mark-hb5zf Dunno. Would be interesting to see a block diagram and a wiring diagram for one of these locos.
I love the description of Dynamic Braking. It's sort of correct from looking at things, but it's not how it truly works.
Yes, the traction motors are used as generators, when dynamic braking (or regenerative braking)is used.
The difference is the power circuit is removed (switched/disconnected by relays most likely), and connected to the massive resistor they just replaced.
Energy from the rolling train is turned into electricity by the traction motors (with magnetic etc,), then the resistor bank resists the electricity being feed into them, requiring more 'energy' to be used to turn the traction motors, slowing down the train.
The resistor bank is turning the electricity into to heat, that then needs to be removed to stop the resistor from melting.
Each use of the Dynamic Brakes heats and oxidise the resistors, making the resistors less able to dissipate the heat. Thus the resistors have a life span, like even thing else on the SD38-2.
Now regenerative braking uses the same idea and in newer trains and cars the electricity is stored in batteries. So it works like this
Energy from the rolling train is turned into electricity by the traction motors (with magnetic etc,), then the batteries stores the electricity being feed into them, requiring more 'energy' to be used to turn the traction motors. This stored energy (in the form of electricity) can be later use to power the traction motors.
I know I most likely have wording wrong, as I learnt this at Uni 30 years ago.
Excellent description of how it works OzyWizard, you are correct.
Thank you so much for sharing your knowledge with us. Very much appreciate your taking the time to visit with us and check out the video my friend.
Bet those grids put on a light show if they were loaded at night 😊. Thanks for more content you won’t see any other place!!!
Wayne
I do know that the last time one went bad a few months ago the
operator said he saw fire shoot out from one of them Wayne! Glad you enjoyed and you are certainly welcome. Very much appreciate your taking the time to visit with us and check out the video my friend.
Dave thanks for the great lnfo 👍🏻😎 . Yes it’s very expensive to take care of the locomotives. 👍🏻 be safe . Robin out .
Your quite welcome Robin. Yes it is expensive but these locos do
a ton of work also. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you Dave interesting
You are certainly welcome Kevin. Glad you enjoyed. Very much appreciate your taking the time to visit with us and check out the video my friend.
Hey, it's darling Dave again. Top notch man with the best video's.
Thank you Johnny for the very kind words. Very much appreciate
your taking the time to visit with us and check out the video my friend.
Oh wow! With my smithing knowledge, I know to burn metal like that you need a really hot fire, like 1500-2k degrees (lots of experience with burning steel in a coal forge, unfortunately 😅) dynamic braking really must be smokin' hot! Loved the look at the old vs. new heat dispensers, loved the purr of the diesel engines too! Appreciate the rare peek into engine maintenance! Thank you😊
Thank you Jennifer for the really nice comment. Last grid that went
bad was at night and the operator said he saw fire shoot out from
that grid! That's hot. Very much appreciate your taking the time to visit with us and check out the video my friend.
In the 70's I worked for Post-Glover, in Erlanger Kentucky. They were known for their grid resistors.
That's pretty interesting to hear adaptolife. I'm not sure where these
were made at, but believe it was somewhere in the US. Most folks
never get to see what the grids actually look like, all they see is
the screening on the outside of the loco, so was glad I was able
to share this with everyone. Very much appreciate your taking the
time to check out the video and write in my friend.
Great documentation once again Dave and it was so nice coming back out to visit last week. Right when I seen your face I knew what you must have been doing without you even say anything. I used to get that way when spiking around mud spots along the RR. Have a wonderul Friday.(Steve)
Thank you Steve for the very nice comment. Glad you enjoyed
the show, it was a good day for sure we had. Very much appreciate your taking the time to visit with us and check out the video my friend.
Your very welcome Dave.@@ccrx6700
Sure was a good video. Have a good weekend
Very pleased to hear you enjoyed this one texaswonderer. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Always wondered about this thanks for sharing Dave that's very interesting
Very pleased to hear you enjoyed the show David. Most folks never get to see what the grids actually look like, all they see is the screening on the outside of the loco body and can't see inside that. Very much appreciate your taking the time to visit with us and check out the video my friend.
Very educational Dave
Very grateful to hear you enjoyed this one Bigmack. Most folks never get to see what the grids actually look like, all they see is the outside
screening, so was pleased to be able to share this part of a loco
with you. Really do appreciate your taking the time to visit with us and check out the video my friend.
@@ccrx6700 your absolutely welcome my friend,that's the best train Utube channel I really appreciate.
Great video Dave.
Thank you very much Brian, so pleased to hear you enjoyed
this one. We don't often replace those grids thank goodness. Was
glad I could share this, most folks never get to see what the actual
grids look like, they only see the screening on the outside. So very grateful for your taking the time to visit with us and check out the video my friend.
good stuff , thanks for all the great videos
Thank you so much Neal for the really nice comment. So pleased
to hear you are enjoying the shows. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thanks Dave 😊
You are quite welcome Frank. Very much appreciate your taking the time to visit with us and check out the video my friend.
thank you for the explanation stay safe
You are very welcome David. Glad you enjoyed. Very much appreciate your taking the time to visit with us and check out the video my friend.
A wonderful entertainment video... let's not forget about the "EDUCATION" value. Your new owners are truly going all out for the company👍💪🚂❗ Looking at the 2 locos, the one getting the new Dynamic Brake Grids sure could use a paint job. is this in "Her" future❓
No paint job in the near future Captain Tom, it does get steam
cleaned once in awhile tho. Glad you enjoyed watching this one.
Not something very many folks ever get to see, all they see is the
screening on the outside. So was glad I could share that with you.
Very grateful my friend for your taking the time to visit with us
and check out the video.
Great Video Dave 👍
Thank you very much JG for the nice comment, am very grateful
to hear you enjoyed this one. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
What great insight on EMD dynamic brakes. A huge version of a Farmall starter/generator crossed with a huge toaster, lol Awesome as always👷♂️🚂🇨🇦🇺🇲🙋
Big toaster Doug. I was told Conrail used to call these grids toasters.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Another great video.
Thank you so much for saying so Kathie. Really pleased to hear
you enjoyed this one. Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
great video Keep them coming !!
Thank you Richard, really pleased to hear you enjoyed this one.
I will try my best to keep good content coming your way. It's a lot
of fun to make these. Very much appreciate your taking the time
to visit with us and check out the video my friend.
Thanks for showing the dynamic braking resistor stack. Always wondered how the heat from electricity generated during dynamic braking is dissipated.
Your quite welcome akhtarkh. Pleased to hear you enjoyed this one.
Most folks never get to see what the grids actually look like, all they see is the outside screening, so was pleased to be able to share this part of a loco with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Hi Dave,
Nice, it is interesting to see the workings of a locomotive.
Yes, those resistors do the same job the bakes on a vehicle.
Need them for going downhill.
The plates are stainless steel, so they last as long as the coal dust lets them.
We used some similar ones on rail dumpers that roll the cars over to empty them when delivering coal to the power stations or lime to the cement plants, huge amount of energy recovered during the roll back with an empty car as the mass is all on the side where the wheel trucks are.
Also, the first time those get to do their job from new there's a huge cloud of smoke as dust and other stuff on the plates burns off when they heat up for the first time.
Kind regards,
Duncan
Thank you for sharing that Duncan. You are right, coal dust on them
is hard on those plates. Appreciate very much your taking the time to visit with us and may you have a very good day my friend.
Cool intro Dave glad your channel is coming along great
Thank you Corey for the kind words, glad you liked it.
@@ccrx6700 your welcome
Thanks. The Mosebach company in Pittsburgh made them, also has offices in Greensburg, Johnstown, Altoona & others in coal country, couldn't get the price for that part number. If the locomotive had a bank of battery's to drive the wheels, the Dynamic Brake energy could charge'em back up instead of wasting it by heating up those big resistance wire/ribbon toasters. Don't know if coal is an electrical conductor, but with some blocking the airflow it sure wouldn't like it. Must be undersized to need airflow else it melts!
Anthracite coal is more than 80% carbon, which is a good conductor of electricity.
So besides blocking the airflow thru the grid, the build-up of coal dust is likely to short out sections also.
Thanks for sharing that Alro, I didn't know that info. Interesting.
When the current is fed to charge batteries or an electric line
for electric trains, that is called regenerative braking. Coal in the
grids is not a good thing, but we can't help it getting in there,
all the coal dust was cleaned from the area before we put then
new grids in. Very much appreciate your taking the time to visit with us and check out the video my friend.
Interesting that you can order those in the right color.
Yes it is, I do doubt that a color selection was available tho stradplayer. It just happened to come that way. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thanks Dave for sharing with us these loco 🚂maintenance insights. Cheers!
You are certainly welcome Tony. Very pleased to hear you enjoyed
this one. Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you
You are certainly welcome Charlie. Glad you enjoyed the show.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Thank you, for another interesting video. The burned out parts looked original and maybe the manufacturer would cover the replacement on warranty a claim 😂. We need you out here in Boston, looking into the mess on the MBTA Greenline. Situation is track width, that after a replacement project was completed it was found to be knowingly narrow. You take proper care of coal haulers and peoples lives are at stake here, oh my. Incompetence abounds in the glorious state of Taxachusetts. 😊. Cheers to you till we meet again.
I've heard it called Taxachusetts before, graduated with a girl who
now lives there EJ and the last time I was talking to her that's what
she said. Glad you enjoyed this video. Hard to believe that during
a track replacement the gage was left narrow, that's just about
as bad as wide gage. Hard on train wheels is narrow gage plus
track fasteners. Easy to have wheel climb on curves also. I have
no idea how long those grids had been in there, but it is not very
often that we replace them. Very much appreciate your taking
the time to visit with us and check out the video my friend.
👍🏻 Good Content .
Thank you noneshere, pleased to hear you enjoyed the show.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Guess the coal dust and general grime build up caused the overheating due to lack of airflow - thanks for the video Dave - have a good weekend.
Coal dust is not good for the grids for sure Glenn. But we just can't
help it getting in there with what we do here. They are never cleaned
as a routine maintenance thing, but at least the coal dust was
cleaned out before the new grids were put back in. May you
have a good week also. Very much appreciate your taking the time to visit with us and check out the video my friend.
I've wondered for years about dynamic brakes. You've answered a lot of questions! 👍
Really glad to hear that Terry, glad you found out something new.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Love your videos
Thank you Mrfingerlakes, I'm very grateful for having you say that,
it does mean a lot of me to hear it from you. Most folks never get
to see what the grids actually look like, all they see is the outside
screening, so was pleased to be able to share this part of a loco
with you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Very interesting stuff technically important
So glad to hear you enjoyed Daniel. Most folks never get to see the
grids, they only see the outside screening and not whats underneath.
Very much appreciate your taking the time to visit with us and check out the video my friend.
Several years ago I was able to tour the Knor brake facility in Westminster, MD with other electricians in the county association about a yr after it opened
I bet that was a fun tour David. Good for you. Very much appreciate your taking the time to visit with us and check out the video my friend.
Wow, those were definitely worn out, big difference to the new ones.. Great share Dave, I definitely learned something today..
Yes they certainly were, coal dust in them is hard on those grids,
but we can't help the dust getting in there. Coal was all cleaned out
before we put the new grids in tho. Glad you found out something new. Most folks never get to actually see what the grids look like
they are hiding behind the screening. Very much appreciate your taking the time to visit with us and check out the video my friend.
I've heard of dynamic brakes for a long time but this is the first time I have seen what they look like. Another interesting video.
Most people never get to see the resister grids Charles, they
are hiding behind the screening and can't see what they look like.
The grids create resistance to the electric current which slows
the traction motors, now generators down, creates a dragging
effect. Glad you enjoyed. Very much appreciate your taking the time to visit with us and check out the video my friend.
There is no need to apologize about the soot on your face. At least you are making some contributions to America. I remember that the resistors underneath the [electric] New York City railcars or subway cars have been formally called "rheostats," in the Road Car Inspector manual. The dynamic brakes work as a combination of electric brake and pneumatic (airbrakes). Long ago, I was told that when the controller is switched off, the traction motors rotate in the opposite direction to cause a "slow-up" of the train, and a slight amount of airbrake is added during dynamic braking. The electric brake slows up the train and sends braking impulses to the other railcars, trainline. I have always wanted to learn how a locomotive works, and I am willing to learn more.💙
That is very interesting to find out about the air brakes working with
the dynamics on those Captain Keyboard, I did not know that. We
have the option to use independent brakes on the loco while in
dynamics but they are not applied normally as part of the dynamic
braking process. Thanks so much for sharing that with me my friend!
@@ccrx6700 Well, you think on high, while I speak on "low." I believe that freight trains are more powerful and advanced than many electrified passenger trains. Thank you for typing to me. Bright Rails and Happy Railroading!👍🚂
Thanks Dave!, really enjoy the videos. I've learned so much watching..
Your welcome Dale, so pleased to hear you are enjoying the videos
and you are finding out some new things. Very much appreciate
your taking the time to visit with us and check out the video my friend.