The $2 bills are still in circulation here, just not common. I pick up a bundle of them (100 pieces, or $200 worth) ever so often when I go to the bank. I like paying for burgers and stuff like that with them at the drive thru. Kids dont really know what to do with them. I also like giving them out to children, like when they are being polite at the grocery store, or if they hold a door for a lady...you know stuff like that. Several years ago, actually about 20 or so, I was framing houses. In the winter work was really slow, and by spring time a man would do just about anything to make money. There was an old (like Methulsula's cat old) yankee name of Mr Twitty up in Phelps county Missouri that hired me to plant about 20 acres of tulip popular trees. Mr. Twitty was a real estate guy, very funny and kind hearted. It seemed to me that he had more money than Croesus. I think he may have pulled the cork a little too much, but Im likely wrong about that. He also pooted a LOT but never let on like he noticed it. The weather was terrible, it rained every day, and there was mud up to my neck the whole time. I didnt really let it bother me too much, I just planted trees because I was near to being hungry. When I got done planting all those sticks, Mr Twitty invited me into his house and pulled open a drawer in the kitchen that was just about full of $2 bills. He cracked some joke about how Id better not try to come rob him, or something like that. He paid me with them, and told me that I would always remember him when I saw one. He was right. Ive always wanted to be the crazy old man who does stuff like that, and here I am. Jay, I hope you think of me or at least Mr Twitty when ever you see a $2 bill. Clif
I did not believe such a thing existed. I thought it was one of those Canadian things that you guys like to make fun of us about. I kind of always liked that. Anyways, you sent ten, not five, and they are a special part of my collection. Thanks! Funny thing: the weirdest people are the ones we remember the most, eh?
I watched your "Compressor Stall" video yesterday, and now when watching you rotate the compressor and talk about the little wings, it all fell into place. I think I now finally Understand how the compressor works and how the air is moved. The compressor is basically thousands of little planes going through the air with a very steep AoA, pushing the air beneath them. That was my lightbulb. Thank you!
WOW!!! What a great informative video once again! Thanks so much for making it for us! I can’t believe all the work that must go into the video production and not to mention the time, care, and work that goes into repairing and maintaining these beautiful engines! Thanks so much!
Hi Jay. The "Don't Tread on Me" flag is used by the U.S. Navy as the Union Jack for the oldest ship in the fleet. Both the ships I had were flying it while I was on board. 79'-85'. Enjoy your videos.
I work for a company that manufacturers these engine components and we call the blades that have no pattern in them "sticks". The parts we make start out as a ceramic core which will later be cast in investment so the core needs to be as close to perfect as humanly possible so the part will require little to no machining. Great videos!
I know you dont like when people speculate on different ways to clean stuff, BUT! I cant help but wonder about dry ice blasting all those intricate components, in my experience parts come out super clean with a smooth finish (not like a grit blasting finish).
Loved to see that you're up an running again. Have been waiting for vids from you forever. Had -22°C here in Norway yesterday, thankfully just -18°C now lol
Very spiffy looking engine now...great work on the blades....I have some experience on cleaning T64 blades (not as crusty as your j47 mind you) does chew up you hand...they bite too..thank you for sharing...stay warm..
JayZ, when I was a Combustion Turbine Technician at Florida Power (now Duke Energy) we used to introduce pecan shell fines into the compressor of our running engine. The shells were ground fine they would polish the compressor blades and burn up in the combustion chamber without damaging the engines. We would use about 50 lbs total over about a 15 minute period. We performed this on our Westinghouse and GE Industrial Combustion Turbines. This would help restore our compressor efficiency. Do they ever clean aircraft jet engine compressors this way?
I recall that, many years ago, R-R used ground cherry stones (I'm a Brit: you might call them pits) for compressor cleaning of both aero engines and their industrial equivalents. I'm trying to recall the brand name under which the stuff was marketed, but, at the moment, I can't. I think I've told the story before on this channel, but, as a young designer at R-R IMD, I recall hearing about an Industrial Avon that was to be cleaned using the stuff. With the engine at idle, an operative went into the intake plenum with a bucketful of the stuff, with the intention of throwing the grounds into the intake. Unfortunately, he let go of the bucket. The good news was that the plastic bucket didn't upset the engine very much, but the metal handle did.
Jay thank you for sharing your wold with us other gear heads. I learn something new watching your vids . As a southern boy that talks funny using words like y’all and mom’nem, I rarely hear you say my fave Canadian word “eh” never sounds the same from anyone else. As always good stuff Jay!
Your videos makes me want to *make* a small jet engine. I mean all you need is a lathe, a mill and knowledge of how to use them - neither of which i have, so that takes care of itself.
You'll also need a 3D printer that uses refractory metal "ink", a high speed balance machine, and most of all, the design of what you want to produce. That will be 80% or more of the cost of the project, and will also require much more expensive equipment.
@@AgentJayZ I dont have those either. Anyways, i was more thinking of a hack jet engine of the type that doesn't neccessarily blow up in your face. 25ish cm diam. Fortunately, as stated above, I have none of the things ;)
When I was in the USAF back in the 1970s and 1980s we called it a "Ford" wrench. I'm not sure why, maybe because with that and a couple of screw drivers you could keep the old Model "A" Fords running, just a guess.
The original model T tool kit had a wrench of that style that had "Ford" cast into the handle. Those are the real "Ford wrenches". But any wrench of that style is commonly called a Ford wrench.
That’s referred to as a ford wrench in the US as many others have noted. They were included in the toolkit in Ford automobiles for years and the ford tractors. The tractor wrenches had a numbered scale on them as they were to be used as your fuel quantity gauge..
hello sir, in merry old England we would have called a " monkey wrench " a few year's back " a Stilson spanner " but now we just call it an adjustable spanner or the locking type " mole grips " but I have one that does both, a very useful tool as for flags the shared type the correct is normally in the top left quarter I knew what a Stilson was when starting out in car mechanic's when the experienced we also still used imperial measurements, Mech's would try to send me to the parts shop for a left hand screwdriver or a long weight, good day, friday lunch at the pub, not ok now I guess. I really loved the Suck Squeeze Bang Blow days occasionally I get a sniff of remembrance it's lovely when I visit a workshop, Epilepsy has spoiled all my fun I was good at it, shame thank you for sharing your exploit's, I am fascinated with the Turbo-Jet types. Mic Stone
Thanks for the video JayZ. Not too many of us old J47 guys left around. As regards the American $2.00 bill, it goes in and out of print, as the situation requires. The most notable reasons in the past was to show how much currency came into community as a result of military bases built. The Soldiers were paid in two dollars bills. Just a little trivia from the J47 days. LOL
Great to hear from you! We need more people who were there sharing their memories of what things were like in those days. I only ask you to not leave out the Agent in my channel name. I suspect that you sir, like I was, might be unaware of a very wealthy popular musician and businessman who goes by that name. I would not want to draw his attention for anything appearing like copyright infringement. Thanks !
@@AgentJayZ I will certainly not make that mistake again AgentJayZ. And no, I never heard of him, but I bet he wouldn't know a J47 from mice in the tailpipe.
The P-38 was my favorite airplane before I started flight simulators. It is not a fighter but an intercepter which means it is not menuverable but fast. It outgunned the Zero. The concept was not to get into a turning game but make passes. I am interested in the Centrifugal engine. I found one short video of one you had in the yard. I can't seem to find any more of it. Please help.
That is a Ford wrench or sometimes called a spud wrench by plumbers. Great relic device but I still use mine when I need the parallel jaws that are larger than a crescent.
I wonder: such an engine with that heavy mass rotating thousands of times per second; how does the gyroscopic effect created can affect the maneuverability of the jet?
Missed you bud. How's the Jets. You look bored again. Got any exciting plans like vacation? I'd try the ocean key. It's about to blow up for spring break.
Hi my master of turbines. First many many thx for the quality of your content. I learn each time a lot. I thought you could be interested to see the following quick video on NASA cooled turbine blade casting... in case you have not seen it yet. Best
First time I've ever commented on a RUclips. Great channel and a Canadian too. Your comment on the B 38 wasn't very specific about being just a turbo it was a turbo supercharged engine and they were counter rotating. I think it was the only one like that in World War II.
Yes. Turbo-supercharged was the way they described it then. We call it turbocharged now. The V-1710s in the P-38 were not equipped with a supercharger that was fed by a turbocharger. They were supercharged by a turbine-driven supercharger. later to be called a turbocharger. That turbo-supercharger was in short supply, and was not fitted to the V-1710 engine in the P-40, which is one big reason that plane was not as great as it could have been.
Thanks for the update. A real great plane though. It had a controversial history with it being sold to the British but without superchargers/Turbo and counter rotating propellers. I think they even sold them back to the states later.
Have you ever tried dry ice cleaning? It works on printing presses I'm sure it would work for this app. it's like bead blasting but with no glass beads to clean up.
@@AgentJayZ Do you have access to dry ice? I used to make the nozzles for a company that sells small portable dry ice cleaning units. CryoGenesis James Becker 216-696-8797 Cleveland, OH
12:20 looks like there is a small piece of scotch brite pad resting at the base of one of the stators? Is it possible for something like that to do damage upon start up?
Everything will be blown out and wiped clean before getting ready to test. Such an article would be very unlikely to cause damage on startup, but anything is possible..
The Gadsden flag (one of my favorites as an American) came about in 1775 during the American revolution. It was a rallying point and reminder to stand against government tyranny. The Gadsden has become even more meaningful to many in recent decades as countless modern gun control laws (unconstitutional 2nd amendment infringements) have been enacted in the US. Fly it with pride JZ!
Have you tried reading the DVD in a computer disk drive? They are usually region-less and should work. I know that hardly helps with wanting to watch it in the livingroom and all but... It should at least work!
@@AgentJayZ That's odd, maybe it's different in north american markets. Good luck either way! Even an old crusty laptop with a drive might be worth trying if you have any.
Ball and roller bearings of high quality. Like regular bearings, but of very close tolerances. Check out my video called twin shaft turbine engine bearings.
Too small, maybe a dental polishing tool for elephants. Another problem: any scratches left by polishing should be along the long axis of each blade/vane. Across the axis is bad, and the residual micro-scratches left by a rotary tool would be less than ideal.
@@AgentJayZ What about an appropriately fine grit flapper wheel in a Dremel or Proxxon tool? If the tool is held orthogonal to the rotation axis of the turbine then the scratches will be in the direction of airflow, which I assume is the preferred direction if there are to be any scratches at all. Or perhaps there's a gentler bit for such a tool which would remove dirt but not leave problematic scratches? It seems like hand cleaning 2000+ faces in 10 six hour sessions could drive a person over the edge. :) I know virtually nothing about real-world mechanics (I'm an IT system engineer by trade), but your videos entertain me immensely. Thank you for making so many of them!
Your first assumption is incorrect. I stopped reading at that point. When a guy who does something shows you how it's done, it's probably best to listen and learn, as opposed to tell him how much smarter and better your way is..... Just sayin'
Sir Double AgentJZed, 2 questions 1) in one shot of the upper casing you had flags in the stator vanes, are they certified for use as a compressor blade cleaner (ah, American Humor) 2) you mentioned your compressor stall video. You went into wonderful great detail as to why turbine compressor sections have variable guide vanes to reduce the angle of attack on the compressor blades while the gas generator was starting, or at low power settings. Question is, on the High Bypass monsters of today, the fans do not have inlet vanes, nor are they variable pitch, as they are designed to work at 3 to 5 hundred knot indicated airspeed, how is it that the fan does not stall at high power settings as found at the beginning of takeoff? ( I think I won the award for the longest run on sentence ever)
Stalling of the blading in a multi-stage compressor is a progressive and cumulative effect. Both the aerofoils and the annulus contraction are designed for efficient high power operation. This means that, at low power and speed, the annulus height reduction should be less than it actually is, and, with fixed aerofoil geometry, the axial velocity would progressively increase, with increasingly positive angles of incidence in successive stages. Variable stators (or bleed valves) counter this effect, as does a VIGV row at the front of a multi-stage compressor where it can be made to work without successive rows of variables.
@@grahamj9101 Hey Gram, great to hear from you. Thank you for responding. This all makes sense in the compressor section, but I was wondering about just the fan on a high bypass engine. Like the GE90 or Trent1000. The fan is ~3 meters in diameter and does not have any ability to have its angle of incidence change. The Compressor section uses active guide vanes to change the direction of the air flow into the blades, that part I get. But at high thrust setting while the engine is stationary, do the fan blades of the bypass fan ever stall? Thanks and I hope you are not getting hit too hard by the weather.
@@todddembsky8321 I was a mechanical designer with experience on compressors, combustors and turbines. For a more detailed answer than I can give, you really need a an aerodynamicist with experience of intake design. Yes, an airliner with a pair of big high bypass turbofan engines will cruise at around 550kt (say, Mn = 0.85), but the intake in front of the engine is designed to diffuse the flow to around Mn = 0.5 or less. Now when the pilot opens up the engines at the start of his take-off roll, the fans induce a high velocity at the engine intake faces, but what that velocity is, I can't give you an exact figure. However, I would expect it to be a high proportion of the velocity at the intake face at cruise. That would tend to give a positive incidence onto the fan blade leading edge and a separation bubble might well occur on the 'suction' surface of the blades. Nevertheless, if the fan can be designed to operate safely with this occurring transiently, then no manufacturer will go to the trouble, expense and complication of designing and incorporating a row of huge fan VIGVs, with a considerable weight penalty - and a performance penalty at cruise.
12 stage hp compressor with hundreds of individual blades. I would prefer a 12 blisk discs in a nice compact unit. Blisk disc definitely cuts back on total number of parts.
@@AgentJayZI work maintenance on cnc at ge aviation. We make rotating parts for the latest engines. We also do the few older types. The new stuff is awesome to watch getting made. It takes days to do one part in some cases. Big bucks are the norm. This business was never cheap. The technology involved is just amazing. Some of those parts could be displayed as work of art. I really enjoy looking at that disk hung up on the wall in your shop. If you ever run across a propulsor hub out of the GE90-115B let me know. I would like to make one into a glass coffee table stand at my house. It weighs 600lbs of pure unobtanium and they won't let me have one from the scrap heap.
@AmanKumar It will of course take the fun out of building it yourself but you could just buy one. This is a 230 N engine: amtjets.com/OlympusHPuniversity.php www.amtjets.com/pdf/Olympus-HP-in-University-config-feb-2019.pdf Costs about 6000 Euro They have smaller and bigger engines depending on your needs.
Everything else being equal? I doubt it. Total weight? Polar moment of inertia? Total power? The only variable you will allow to be different is Total number of engines? I do not think that is possible, and I don't think you define " everything else being equal" the same way I do. IMHO, your proposal is impossible. Gotta go... won't be back. Cheers!
Because they’re engineered NOT to interfere with each other... the variable intake guide vanes and compressor stators are fixed in place on the front and rear compressor stator casings... and the compressor blades are fixed in place on their discs...
I am fresh graduate , I would like to work as a gas turbine engineer , could you teĺl me the names of companies which work in this field .... what ever the country where is
One important step in finding a good job is coming up with a list of companies that you might want to apply to. That's part of the job of finding a job. Hoping someone else is going to do that for you... is nod a good indicator of success.
@@AgentJayZ Is not a good indicator of success !! One important step in finding a good job is coming up with a list of companies that you might to apply to ! ----------------- I don't understand your point of view ! Any way ... I know GE , Pratt and Whitney RR and all theses high companies... But for fresh graduate these companies will not accept me ... I would like to work for small companies to get experience which will accept me as a fresh . Hoping that you are going to help me !
They’re pretty cool, eh? Used to collect them, when I was a kid. I’m looking forward to a comparison of the US and the Canadian $2 bills. I’m glad that viewer got them to you.
Hi AgentJay Z , I am a great fan of yours and have been following your channel for over 4 years of my intensive bachelors degree study her in MOSCOW AVIATION INSTITUTE in Russia .... I'm actually from Nigeria ... speaking of the truth your videos are just like my live practical session and it has kept me just so outstanding in my areas of study here in my university while studying in the "Power Plants and Engines of flying Vehicles' Faculty" Great thanks to you for helping me with your videos to understand my Career better .... I've so dreamt of this. I actually write to ask for any ideas of job opportunities in your country where I could apply and start up work after my Graduation by June / July this year... although I wish to go for a master degree after study.. but I can't unfortunately due to no financial support to help me continue .. I apologize that I am writing about this here if you aren't comfortable with it. I'm so sorry ... but I hope you would have it in your heart to understand me... and help me out with a good reply .... thank you so much for your understanding and once again I'm so sorry. Oscar.
The blades look like they are fixed rigid rather than being flexible and having a wobble. In a previous video you said this would be bad as vibration would cause fatigue. Is there a reason for this being ok on this engine?
I will answer your question, but I am saddened that you have used the word turbine, when you meant turbine engine. Also you have not specified which type of turbine engine, nor have you defined what type of power, so I will go with the easiest. The easiest is the net usable output power of a power turbine being driven by an industrial gas generator. There will usually be a torque meter installed on the output shaft of the PT. You can multiply the torque in ft-lbs by the rpm of the shaft, divide by 5250, and you get an answer in horsepower...
@@AgentJayZ You're right. I am sorry for this uncertainty, I did not think far enough. I am 17 years old and this topic is new for me. I mean the total power of a turbojet engine. Power is force times velocity but in the test-cell the engine does not move. Moreover it is very difficult to messure the mass flow that goes through the engine. That causes my confusion.
@@morrisfroschl7947 With turbojets it is not very useful to think in terms of power because these engines don't generate mechanical work, instead creating a jet. They generate a thrust that is largely constant with speed (but not with altitude) and therefore the propulsive power is increasing (almost) linearly with speed - so talking about power is of no use. Propeller driven aircraft (whether a piston or a turboprop) are the opposite - they generate a nearly constant power with speed, so the thrust is decreasing inversely to speed - therefore in these cases we talk about power and not thrust. Like you said, on a test stand the power is 0 since it is standing still, but that is not to say that the engine generates no power - excluding elevation effects it is generating the same power as it does at speed, the difference is that the propulsive efficiency is 0 at stand still so all of that power is wasted. Propulsive efficiency increases with speed, which is why it is commonly said that turbojets generate more power the faster they go, but it is more accurate to say that more of the power is "useful" the faster they go and less is wasted.
AgentJayZ ~ You have taken mentoring to a whole new level and I greatly appreciate seeing an A&P mechanic doing this . A very great man and friend mentored me in my youth and this kindness has shaped the way I approach the exchange of knowledge and information throughout my life . (He was snatched up by a tiny country for a huge amount lol)
Well with your irrational Metric Measurements and Celcius nonsense, I guess you might as well go with currency that is based on Prime Numbers. P.S. I love the beast of a P47. Yes, the P38 was cool but the Mosquito was one awsome aircraft.
Great work. Looks new. I have learned so much watching your videos. They are the only thing that keep me from getting bored running on a treadmill (New Years resolution). I’m an Undergrad aerospace engineering major who was/is OBSESSED with the jet turbine process. The “jet fuel hoax” people are idiots by the way and they should NOT be using your material. Compressed air???? Morons. Anyway still trying to figure out how to contribute and get an S&S shirt!!!! Let me know
Greetings from lovely snowy Estonia! Its funny, it was just this morning that I checked your channel in case Id missed a vid and lo and behold YT sends me a message that you just posted! Quick question: Are blades always hand cleaned or would you ever use "power" tools, e.g. rotary brush or similar? Also did your work scope include checking all the blades for damage, or would you have picked that up when cleaning? Thanks.
More commonly, compressor blades are cleaned after disassembly of the rotor. They can be media blasted at low pressure, or they can be put in a vibratory media agitator. The use of pencil grinders or disc sanders, etc, is not advisable, because it is so easy to damage the blades with power tools. In our case, we inspected each blade visually and by touch both before and after cleaning. No damaged blades were found.
Dont tread on me flag is the flag of the U.S. Militia as written in the U.S. Constitution. I see others have made reference that the flag is the 2nd Ammendment flag. This is not the case, although, as a militia, you believe in the 2nd Ammendment to the Constitution and you see its importance.
Not sure if I've already asked this but have you seen the report about a number of ex RCAF Sabres being sold privately? ruclips.net/video/S8sxOG-hP_4/видео.html Also the link on your about page to the complete list of vids is faulty. I was very surprised to see it is an Ausie domain.
The $2 bills are still in circulation here, just not common. I pick up a bundle of them (100 pieces, or $200 worth) ever so often when I go to the bank. I like paying for burgers and stuff like that with them at the drive thru. Kids dont really know what to do with them. I also like giving them out to children, like when they are being polite at the grocery store, or if they hold a door for a lady...you know stuff like that.
Several years ago, actually about 20 or so, I was framing houses. In the winter work was really slow, and by spring time a man would do just about anything to make money. There was an old (like Methulsula's cat old) yankee name of Mr Twitty up in Phelps county Missouri that hired me to plant about 20 acres of tulip popular trees. Mr. Twitty was a real estate guy, very funny and kind hearted. It seemed to me that he had more money than Croesus. I think he may have pulled the cork a little too much, but Im likely wrong about that. He also pooted a LOT but never let on like he noticed it.
The weather was terrible, it rained every day, and there was mud up to my neck the whole time. I didnt really let it bother me too much, I just planted trees because I was near to being hungry. When I got done planting all those sticks, Mr Twitty invited me into his house and pulled open a drawer in the kitchen that was just about full of $2 bills. He cracked some joke about how Id better not try to come rob him, or something like that. He paid me with them, and told me that I would always remember him when I saw one. He was right.
Ive always wanted to be the crazy old man who does stuff like that, and here I am. Jay, I hope you think of me or at least Mr Twitty when ever you see a $2 bill.
Clif
I did not believe such a thing existed. I thought it was one of those Canadian things that you guys like to make fun of us about. I kind of always liked that.
Anyways, you sent ten, not five, and they are a special part of my collection. Thanks!
Funny thing: the weirdest people are the ones we remember the most, eh?
I watched your "Compressor Stall" video yesterday, and now when watching you rotate the compressor and talk about the little wings, it all fell into place. I think I now finally Understand how the compressor works and how the air is moved. The compressor is basically thousands of little planes going through the air with a very steep AoA, pushing the air beneath them. That was my lightbulb. Thank you!
WOW!!! What a great informative video once again! Thanks so much for making it for us! I can’t believe all the work that must go into the video production and not to mention the time, care, and work that goes into repairing and maintaining these beautiful engines! Thanks so much!
Hi Jay. The "Don't Tread on Me" flag is used by the U.S. Navy as the Union Jack for the oldest ship in the fleet. Both the ships I had were flying it while I was on board. 79'-85'. Enjoy your videos.
Very impressed with the build Jay. You have amazing patience. Stay warm up there!
Actually thanks to youtube i can watch you in the past.
I work for a company that manufacturers these engine components and we call the blades that have no pattern in them "sticks". The parts we make start out as a ceramic core which will later be cast in investment so the core needs to be as close to perfect as humanly possible so the part will require little to no machining. Great videos!
Thank you for your videos, I like how you explain everything you do. I am a military jet fan and it is interesting what makes them go!
Ford Wrench worked J 79 -15 -17 and J 57 USAF 69-72, still have a p38 can opener on my key chain
I know you dont like when people speculate on different ways to clean stuff, BUT! I cant help but wonder about dry ice blasting all those intricate components, in my experience parts come out super clean with a smooth finish (not like a grit blasting finish).
Loved to see that you're up an running again. Have been waiting for vids from you forever. Had -22°C here in Norway yesterday, thankfully just -18°C now lol
Very spiffy looking engine now...great work on the blades....I have some experience on cleaning T64 blades (not as crusty as your j47 mind you) does chew up you hand...they bite too..thank you for sharing...stay warm..
JayZ, when I was a Combustion Turbine Technician at Florida Power (now Duke Energy) we used to introduce pecan shell fines into the compressor of our running engine. The shells were ground fine they would polish the compressor blades and burn up in the combustion chamber without damaging the engines. We would use about 50 lbs total over about a 15 minute period. We performed this on our Westinghouse and GE Industrial Combustion Turbines. This would help restore our compressor efficiency. Do they ever clean aircraft jet engine compressors this way?
I recall that, many years ago, R-R used ground cherry stones (I'm a Brit: you might call them pits) for compressor cleaning of both aero engines and their industrial equivalents. I'm trying to recall the brand name under which the stuff was marketed, but, at the moment, I can't.
I think I've told the story before on this channel, but, as a young designer at R-R IMD, I recall hearing about an Industrial Avon that was to be cleaned using the stuff. With the engine at idle, an operative went into the intake plenum with a bucketful of the stuff, with the intention of throwing the grounds into the intake. Unfortunately, he let go of the bucket. The good news was that the plastic bucket didn't upset the engine very much, but the metal handle did.
Dude knows his flags
Thanks. That nicely balances out a recent comment from someone who called me a flag moron...
Jay thank you for sharing your wold with us other gear heads. I learn something new watching your vids . As a southern boy that talks funny using words like y’all and mom’nem, I rarely hear you say my fave Canadian word “eh” never sounds the same from anyone else. As always good stuff Jay!
I'll try to add a few more here and there...
Thank you so much I am big fan of your channel from 3 years thank you again from shearing your experience and you helped me .
Your videos makes me want to *make* a small jet engine. I mean all you need is a lathe, a mill and knowledge of how to use them - neither of which i have, so that takes care of itself.
You'll also need a 3D printer that uses refractory metal "ink", a high speed balance machine, and most of all, the design of what you want to produce. That will be 80% or more of the cost of the project, and will also require much more expensive equipment.
@@AgentJayZ I dont have those either. Anyways, i was more thinking of a hack jet engine of the type that doesn't neccessarily blow up in your face. 25ish cm diam. Fortunately, as stated above, I have none of the things ;)
WONDERFUL INFORMATIVE STUFF AS ALWAYS... SUMMER HERE IN AUSSIE 40 plus CELSIUS AND NOT NICE. ❤️ your work
When I was in the USAF back in the 1970s and 1980s we called it a "Ford" wrench. I'm not sure why, maybe because with that and a couple of screw drivers you could keep the old Model "A" Fords running, just a guess.
,,, ditto .
The original model T tool kit had a wrench of that style that had "Ford" cast into the handle. Those are the real "Ford wrenches". But any wrench of that style is commonly called a Ford wrench.
We still print the $2 bill...just never see them in circulation. You can get sheets of uncut 2s, 1s, 5s and so on.
That’s referred to as a ford wrench in the US as many others have noted. They were included in the toolkit in Ford automobiles for years and the ford tractors. The tractor wrenches had a numbered scale on them as they were to be used as your fuel quantity gauge..
hello sir, in merry old England we would have called a " monkey wrench " a few year's back
" a Stilson spanner " but now we just call it an adjustable spanner or the locking type
" mole grips " but I have one that does both, a very useful tool
as for flags the shared type the correct is normally in the top left quarter
I knew what a Stilson was when starting out in car mechanic's when the experienced we also still used imperial measurements, Mech's would try to send me to the parts shop for a left hand screwdriver or a long weight, good day, friday lunch at the pub, not ok now I guess.
I really loved the Suck Squeeze Bang Blow days occasionally I get a sniff of remembrance
it's lovely when I visit a workshop, Epilepsy has spoiled all my fun I was good at it, shame
thank you for sharing your exploit's, I am fascinated with the Turbo-Jet types. Mic Stone
Thanks for the video JayZ. Not too many of us old J47 guys left around. As regards the American $2.00 bill, it goes in and out of print, as the situation requires. The most notable reasons in the past was to show how much currency came into community as a result of military bases built. The Soldiers were paid in two dollars bills. Just a little trivia from the J47 days. LOL
Great to hear from you! We need more people who were there sharing their memories of what things were like in those days.
I only ask you to not leave out the Agent in my channel name.
I suspect that you sir, like I was, might be unaware of a very wealthy popular musician and businessman who goes by that name.
I would not want to draw his attention for anything appearing like copyright infringement.
Thanks !
@@AgentJayZ I will certainly not make that mistake again AgentJayZ. And no, I never heard of him, but I bet he wouldn't know a J47 from mice in the tailpipe.
The P-38 was my favorite airplane before I started flight simulators. It is not a fighter but an intercepter which means it is not menuverable but fast. It outgunned the Zero. The concept was not to get into a turning game but make passes. I am interested in the Centrifugal engine. I found one short video of one you had in the yard. I can't seem to find any more of it. Please help.
@ AgentJayZ I bet you wish you got paid by the blade... Good to see you back again!
Yeah I was thinking the same. Let's do some math. $2/blade times............oh wow
Great to see you back again :)
That is a Ford wrench or sometimes called a spud wrench by plumbers. Great relic device but I still use mine when I need the parallel jaws that are larger than a crescent.
The U.S.A.F calls it a Ford wrench. At least when I was in 20 years ago.
I wonder: such an engine with that heavy mass rotating thousands of times per second; how does the gyroscopic effect created can affect the maneuverability of the jet?
Cool.
Great video once again.
"When will then be now?!"
"SOOON!"
Happy New Year :)
I think the P38 was also the fastest air to ground attack aircraft of WWII
You really have to love gas turbines to polish all of those blades lol! Love your vids !
P-47, the best WWII airplane indeed, Im 10 months in working on a 1/16 scale balsa P47 model
its called a Ford wrench used on larger hard to get at hoses.. enjoy from NS
There is also a can opener known as a " P-51" . It's about 50% larger.
A P-38 needed 38 twist to open a regular can. Was the larger 51 for bigger, heavier cans?
hi there, it's 2022 and time travel is not yet possible I regret to inform you, I'll try to check in when that does happen tho
Jet City & AgentJayZ - not just a jet engine workshop and technician, but a cultural institution :-)
Missed you bud. How's the Jets. You look bored again. Got any exciting plans like vacation? I'd try the ocean key. It's about to blow up for spring break.
Hi my master of turbines. First many many thx for the quality of your content. I learn each time a lot. I thought you could be interested to see the following quick video on NASA cooled turbine blade casting... in case you have not seen it yet. Best
First time I've ever commented on a RUclips. Great channel and a Canadian too.
Your comment on the B 38 wasn't very specific about being just a turbo it was a turbo supercharged engine and they were counter rotating. I think it was the only one like that in World War II.
Yes. Turbo-supercharged was the way they described it then. We call it turbocharged now.
The V-1710s in the P-38 were not equipped with a supercharger that was fed by a turbocharger.
They were supercharged by a turbine-driven supercharger. later to be called a turbocharger.
That turbo-supercharger was in short supply, and was not fitted to the V-1710 engine in the P-40, which is one big reason that plane was not as great as it could have been.
Thanks for the update. A real great plane though. It had a controversial history with it being sold to the British but without superchargers/Turbo and counter rotating propellers. I think they even sold them back to the states later.
2:50 Yeay, Sweden! :-)
Beautiful! When a blade starts to fracture, does it become stronger?! It's counter-intuitive I know, but...
Love the Gadsden Flag!
Have you ever tried dry ice cleaning? It works on printing presses I'm sure it would work for this app. it's like bead blasting but with no glass beads to clean up.
It's great. Not available in this town.
@@AgentJayZ Do you have access to dry ice? I used to make the nozzles for a company that sells small portable dry ice cleaning units.
CryoGenesis James Becker 216-696-8797 Cleveland, OH
9:25 it certainly looks beautiful! is that an 11 stage compressor?
Try VLC Player for that DVD
12:20 looks like there is a small piece of scotch brite pad resting at the base of one of the stators? Is it possible for something like that to do damage upon start up?
Everything will be blown out and wiped clean before getting ready to test. Such an article would be very unlikely to cause damage on startup, but anything is possible..
thank you. for your pleasant video.
The Gadsden flag (one of my favorites as an American) came about in 1775 during the American revolution. It was a rallying point and reminder to stand against government tyranny. The Gadsden has become even more meaningful to many in recent decades as countless modern gun control laws (unconstitutional 2nd amendment infringements) have been enacted in the US. Fly it with pride JZ!
The best plane of WWII, A Hawker Tempest MK V, with a 24 Cyl flat H, 2,200-3,500 HP Napier Sabre engine.
Mmmmm... Sleeve valves....
AgentJayZ yep, the only part of the engine you want to stay dirty as the carbon deposits help seal the sleeves
Have you tried reading the DVD in a computer disk drive? They are usually region-less and should work. I know that hardly helps with wanting to watch it in the livingroom and all but... It should at least work!
The DVD drive in my latest computer will not recognize it. Will try an older one.
@@AgentJayZ That's odd, maybe it's different in north american markets. Good luck either way! Even an old crusty laptop with a drive might be worth trying if you have any.
You can try a free program called dvdfab. It removes region codes and other restrictions so you can play any DVD/Blu ray on a computer.
What kind of bearings are used on the turbine shafts. It seems that with just a tiny bit of wind that bizjet blades start turning ...
Ball and roller bearings of high quality. Like regular bearings, but of very close tolerances. Check out my video called twin shaft turbine engine bearings.
Cleaning the compressor blades sounds like apprentice work.
My guess is that an apprentice does not touch a J47; but might be seen looking over the shoulder of 'The Master'.
Good work
The "Whittle the Jet Pioneer" movie is on RUclips.
We are all traveling through time now.
Would a dental polishing tool be allowed if it worked better or would you be stuck using your fingers because the manual says so?
Too small, maybe a dental polishing tool for elephants.
Another problem: any scratches left by polishing should be along the long axis of each blade/vane. Across the axis is bad, and the residual micro-scratches left by a rotary tool would be less than ideal.
@@AgentJayZ What about an appropriately fine grit flapper wheel in a Dremel or Proxxon tool? If the tool is held orthogonal to the rotation axis of the turbine then the scratches will be in the direction of airflow, which I assume is the preferred direction if there are to be any scratches at all.
Or perhaps there's a gentler bit for such a tool which would remove dirt but not leave problematic scratches?
It seems like hand cleaning 2000+ faces in 10 six hour sessions could drive a person over the edge. :)
I know virtually nothing about real-world mechanics (I'm an IT system engineer by trade), but your videos entertain me immensely. Thank you for making so many of them!
Your first assumption is incorrect. I stopped reading at that point.
When a guy who does something shows you how it's done, it's probably best to listen and learn, as opposed to tell him how much smarter and better your way is.....
Just sayin'
@@AgentJayZ Thankyou for your replies. Interesting how sometimes there's just no better tool than a human hand. Good video.
I have one of those wrenches!
Sir Double AgentJZed, 2 questions 1) in one shot of the upper casing you had flags in the stator vanes, are they certified for use as a compressor blade cleaner (ah, American Humor) 2) you mentioned your compressor stall video. You went into wonderful great detail as to why turbine compressor sections have variable guide vanes to reduce the angle of attack on the compressor blades while the gas generator was starting, or at low power settings. Question is, on the High Bypass monsters of today, the fans do not have inlet vanes, nor are they variable pitch, as they are designed to work at 3 to 5 hundred knot indicated airspeed, how is it that the fan does not stall at high power settings as found at the beginning of takeoff? ( I think I won the award for the longest run on sentence ever)
Stalling of the blading in a multi-stage compressor is a progressive and cumulative effect. Both the aerofoils and the annulus contraction are designed for efficient high power operation. This means that, at low power and speed, the annulus height reduction should be less than it actually is, and, with fixed aerofoil geometry, the axial velocity would progressively increase, with increasingly positive angles of incidence in successive stages. Variable stators (or bleed valves) counter this effect, as does a VIGV row at the front of a multi-stage compressor where it can be made to work without successive rows of variables.
@@grahamj9101 Hey Gram, great to hear from you. Thank you for responding. This all makes sense in the compressor section, but I was wondering about just the fan on a high bypass engine. Like the GE90 or Trent1000. The fan is ~3 meters in diameter and does not have any ability to have its angle of incidence change. The Compressor section uses active guide vanes to change the direction of the air flow into the blades, that part I get. But at high thrust setting while the engine is stationary, do the fan blades of the bypass fan ever stall? Thanks and I hope you are not getting hit too hard by the weather.
@@todddembsky8321 I was a mechanical designer with experience on compressors, combustors and turbines. For a more detailed answer than I can give, you really need a an aerodynamicist with experience of intake design. Yes, an airliner with a pair of big high bypass turbofan engines will cruise at around 550kt (say, Mn = 0.85), but the intake in front of the engine is designed to diffuse the flow to around Mn = 0.5 or less.
Now when the pilot opens up the engines at the start of his take-off roll, the fans induce a high velocity at the engine intake faces, but what that velocity is, I can't give you an exact figure. However, I would expect it to be a high proportion of the velocity at the intake face at cruise. That would tend to give a positive incidence onto the fan blade leading edge and a separation bubble might well occur on the 'suction' surface of the blades.
Nevertheless, if the fan can be designed to operate safely with this occurring transiently, then no manufacturer will go to the trouble, expense and complication of designing and incorporating a row of huge fan VIGVs, with a considerable weight penalty - and a performance penalty at cruise.
One of the biggest problems we'll have to solve with time travel is verb tense...
What is the typical tip clearance on those compressor blades?
Shown in the video.
Can dry ice blasting be used to clean the blades? Would be much quicker than scotch brite and no residual other than what is removed from the blades.
I t is very effective. I'm looking into the possibility of obtaining the equipment.
@@AgentJayZ 👨💻👍
12 stage hp compressor with hundreds of individual blades. I would prefer a 12 blisk discs in a nice compact unit. Blisk disc definitely cuts back on total number of parts.
Sure does. But massively increases the price of a minor repair. One blade, or one blisk?
@@AgentJayZI work maintenance on cnc at ge aviation. We make rotating parts for the latest engines. We also do the few older types. The new stuff is awesome to watch getting made. It takes days to do one part in some cases. Big bucks are the norm. This business was never cheap. The technology involved is just amazing. Some of those parts could be displayed as work of art. I really enjoy looking at that disk hung up on the wall in your shop. If you ever run across a propulsor hub out of the GE90-115B let me know. I would like to make one into a glass coffee table stand at my house. It weighs 600lbs of pure unobtanium and they won't let me have one from the scrap heap.
Could you use a rotary tool to clean the blades or would that be to harsh?
Sir ,Is it possible to make mini jet engine producing 25 kg of thrust if it is possible then please elaborate it sir
Anything is possible.
I do not design engines.
@@AgentJayZ I will try to make one
@AmanKumar It will of course take the fun out of building it yourself but you could just buy one. This is a 230 N engine: amtjets.com/OlympusHPuniversity.php www.amtjets.com/pdf/Olympus-HP-in-University-config-feb-2019.pdf
Costs about 6000 Euro
They have smaller and bigger engines depending on your needs.
You need a Dimmt and Gonzales flag all up in there ..
Compressor blade cans,o yes I'm in heaven 😀
I have read , everything else being equal , a single engine prop plane is more maneuverable than an equivalent twin engine fighter .
Wyr
God bless
Everything else being equal? I doubt it. Total weight? Polar moment of inertia? Total power?
The only variable you will allow to be different is Total number of engines?
I do not think that is possible, and I don't think you define " everything else being equal" the same way I do.
IMHO, your proposal is impossible.
Gotta go... won't be back. Cheers!
i wonder how they can assembly van to top cover and keep them in place so not interfere with blade rotation? thank you
Jet engines are kind of known for being well-made...
Because they’re engineered NOT to interfere with each other... the variable intake guide vanes and compressor stators are fixed in place on the front and rear compressor stator casings... and the compressor blades are fixed in place on their discs...
Are those yellow and blue fittings and hoses new installed (replaced), they look like new, do thew have a limited lifetime on the engine?
yes, and yes. Parker Stratoflex.
15:17 You planned that..
Hey Jay, would it be possible to dry ice blast those compressor blades instead of hand cleaning?
I've done that on a gas turbine for a power company. But that thing was ah.. quite a bit larger
I did find this. www.coldjet.com/media-2014/en/pdf/case-studies/cs_rolls_royce_aerospace.pdf
stupid question but cleaning the blades by ice blasting is not possible ?
That would work, I think.
I am fresh graduate , I would like to work as a gas turbine engineer , could you teĺl me the names of companies which work in this field .... what ever the country where is
One important step in finding a good job is coming up with a list of companies that you might want to apply to.
That's part of the job of finding a job.
Hoping someone else is going to do that for you... is nod a good indicator of success.
@@AgentJayZ
Is not a good indicator of success !!
One important step in finding a good job is coming up with a list of companies that you might to apply to !
-----------------
I don't understand your point of view !
Any way ... I know GE , Pratt and Whitney
RR and all theses high companies...
But for fresh graduate these companies will not accept me ... I would like to work for small companies to get experience which will accept me as a fresh .
Hoping that you are going to help me !
Still not gettin' it... this is really not looking good for you, sir.
We still print $2 bills in the US
Yes, I was just sent some by a friendly american. I never knew there were US 2 dollar bills.
They’re pretty cool, eh? Used to collect them, when I was a kid. I’m looking forward to a comparison of the US and the Canadian $2 bills. I’m glad that viewer got them to you.
Hi AgentJay Z , I am a great fan of yours and have been following your channel for over 4 years of my intensive bachelors degree study her in MOSCOW AVIATION INSTITUTE in Russia .... I'm actually from Nigeria ... speaking of the truth your videos are just like my live practical session and it has kept me just so outstanding in my areas of study here in my university while studying in the "Power Plants and Engines of flying Vehicles' Faculty" Great thanks to you for helping me with your videos to understand my Career better .... I've so dreamt of this. I actually write to ask for any ideas of job opportunities in your country where I could apply and start up work after my Graduation by June / July this year... although I wish to go for a master degree after study.. but I can't unfortunately due to no financial support to help me continue .. I apologize that I am writing about this here if you aren't comfortable with it. I'm so sorry ... but I hope you would have it in your heart to understand me... and help me out with a good reply .... thank you so much for your understanding and once again I'm so sorry. Oscar.
The blades look like they are fixed rigid rather than being flexible and having a wobble. In a previous video you said this would be bad as vibration would cause fatigue. Is there a reason for this being ok on this engine?
This is a very old engine design. The blades are indeed staked into position on the rotor. The way it was done in 1947...
My Estonian wife wants to know if AgentJayZ is really rick Moranis?
Take off, eh?
Honey, I shrunk my Spaceballs...
How is the power of a turbine messured/calculated?
I will answer your question, but I am saddened that you have used the word turbine, when you meant turbine engine.
Also you have not specified which type of turbine engine, nor have you defined what type of power, so I will go with the easiest.
The easiest is the net usable output power of a power turbine being driven by an industrial gas generator.
There will usually be a torque meter installed on the output shaft of the PT. You can multiply the torque in ft-lbs by the rpm of the shaft, divide by 5250, and you get an answer in horsepower...
@@AgentJayZ You're right. I am sorry for this uncertainty, I did not think far enough. I am 17 years old and this topic is new for me. I mean the total power of a turbojet engine.
Power is force times velocity but in the test-cell the engine does not move. Moreover it is very difficult to messure the mass flow that goes through the engine. That causes my confusion.
@@morrisfroschl7947 With turbojets it is not very useful to think in terms of power because these engines don't generate mechanical work, instead creating a jet. They generate a thrust that is largely constant with speed (but not with altitude) and therefore the propulsive power is increasing (almost) linearly with speed - so talking about power is of no use. Propeller driven aircraft (whether a piston or a turboprop) are the opposite - they generate a nearly constant power with speed, so the thrust is decreasing inversely to speed - therefore in these cases we talk about power and not thrust.
Like you said, on a test stand the power is 0 since it is standing still, but that is not to say that the engine generates no power - excluding elevation effects it is generating the same power as it does at speed, the difference is that the propulsive efficiency is 0 at stand still so all of that power is wasted. Propulsive efficiency increases with speed, which is why it is commonly said that turbojets generate more power the faster they go, but it is more accurate to say that more of the power is "useful" the faster they go and less is wasted.
@@ASJC27 Wow, thanks for your answer
AgentJayZ ~ You have taken mentoring to a whole new level and I greatly appreciate seeing an A&P mechanic doing this . A very great man and friend mentored me in my youth and this kindness has shaped the way I approach the exchange of knowledge and information throughout my life . (He was snatched up by a tiny country for a huge amount lol)
Well with your irrational Metric Measurements and Celcius nonsense, I guess you might as well go with currency that is based on Prime Numbers.
P.S. I love the beast of a P47. Yes, the P38 was cool but the Mosquito was one awsome aircraft.
another slang name of the p-38 can opener was John Wayne.
Great work. Looks new. I have learned so much watching your videos. They are the only thing that keep me from getting bored running on a treadmill (New Years resolution). I’m an Undergrad aerospace engineering major who was/is OBSESSED with the jet turbine process. The “jet fuel hoax” people are idiots by the way and they should NOT be using your material. Compressed air???? Morons. Anyway still trying to figure out how to contribute and get an S&S shirt!!!! Let me know
They are now selling them online at ssturbine.com
I love ya. But its nowhere on the website
The site is under revamp surgery... won't be long.
merch@ssturbine.com is a way to get in touch with marketing until the new website is functional...
It was issued in the
🤔🤔💯
There’s a soft buzzing sound in some parts of the video when there’s silence, good otherwise
It's my wireless mic. I've recently tried an adjustment... we'll see if it helps.
Greetings from lovely snowy Estonia! Its funny, it was just this morning that I checked your channel in case Id missed a vid and lo and behold YT sends me a message that you just posted! Quick question: Are blades always hand cleaned or would you ever use "power" tools, e.g. rotary brush or similar? Also did your work scope include checking all the blades for damage, or would you have picked that up when cleaning? Thanks.
More commonly, compressor blades are cleaned after disassembly of the rotor. They can be media blasted at low pressure, or they can be put in a vibratory media agitator.
The use of pencil grinders or disc sanders, etc, is not advisable, because it is so easy to damage the blades with power tools.
In our case, we inspected each blade visually and by touch both before and after cleaning. No damaged blades were found.
OK, I'm okay with you repeatedly saying OhKay.
More.
The most useful bill could be 1.99
Great video. hey check out *Greg's Airplanes and Automobiles* channel for great in depth discussions on the Thunderbolt and other WW2 aircraft.
Here's a site with instructions on how to unlock regions on your DVD: www.videohelp.com/dvdhacks
Dont tread on me flag is the flag of the U.S. Militia as written in the U.S. Constitution. I see others have made reference that the flag is the 2nd Ammendment flag. This is not the case, although, as a militia, you believe in the 2nd Ammendment to the Constitution and you see its importance.
Ok
Not sure if I've already asked this but have you seen the report about a number of ex RCAF Sabres being sold privately? ruclips.net/video/S8sxOG-hP_4/видео.html Also the link on your about page to the complete list of vids is faulty. I was very surprised to see it is an Ausie domain.
it is a pipe wrench
No teeth, no rocking cam action... no pipe wrench.
@@AgentJayZ i tryed lol thanx agentjayz
Jz
If you send me your mailing address, I would like to send you our flag: Puerto Rico
1776 when the USA became a country.
Give or take a couple of years
Don't tread on me is for the US 2nd amendment rights
joseph forcucci No. it’s technically the first flag of the United States, before we had the Besty Ross flag. It’s called a Gadsden Flag.
2nd amendment is overdo of a rewrite! Its outdated!!!!