The Top Ten Most Powerful Steam Locomotives in the World (ordered by hp)
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- Опубликовано: 19 окт 2024
- The Top Ten Most Powerful Steam Locomotives in the World (ordered by hp)
10-Southern Pacific class GS-4
09-Norfolk & Western Y6 class
08-Southern Pacific class AC-12
07-DM&IR M-4 Yellowstone
06-Union Pacific Big Boy
05-Pennsylvania Railroad class T1
04-New York Central Niagara
03-Pennsylvania Railroad class S1
02-C&O & VGN Allegheny
01-Pennsylvania Railroad class Q2
source:
Wikipedia
List of largest locomotives
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This should be called “top 10 least research done on a video with trains ffs”
NSB Productions. If you are going to criticize, then the challenge is to come up with something better. Lets see your Top 10 World's Most Powerful Steam Locomotives. Oh and don't forget your sources too thanks.
@@Blackscorpion1963 He is right though. Tractive effort is what really matters when discussing how "powerful" a locomotive is. for example. The S1. It did produce more HP than a big boy, BUT its weight distribution was awful. Making the Locomotive weak for its size on the tracks. This means that while the S1 could generate more horsepower, but the Big Boy could pull almost twice as much. It's even on Wikipedia, where it's stated that the S1 had around 76,000 lbs of tractive effort, compared to the Big Boy's ca 135,000 lbs.
en.wikipedia.org/wiki/Union_Pacific_Big_Boy. en.wikipedia.org/wiki/Pennsylvania_Railroad_class_S1.
It's the other way around for the Yellowstone. It had less horsepower than the Big Boy but actually had more tractive effort. It actually had around 140,000 lbs of tractive effort, compared to the big boy's around 135,000.
A locomotive can have way more horsepower than another one but still not be able to pull as much weight.
@@closetman7757 thank you for the info learned a lot!
@@Blackscorpion1963 He's very much right actually
And yeah lol that's the most unresearched video I've ever seen
id like to point out that the 4014 horsepower was greatly increased after its restoration. it now has just as much if not possibly more than the allegheny
Got proof? The Big Boy HP output was never tested after the conversion to oil. The oil firing is causing uneven heating in the firebox, so it very well may be producing less HP than it did with coal.
@@markantony3875 exactly they didn't test it out and now they retired it. But I'm sure after it gets restored sometime in the future they will test it's hp.
Also it's impossible oil can add 1200hp+ so it can be higher than the Alleghenies
@@abeda1636 Doing an oil burner conversion on a steam engine designed for coal generally does not provide the same heating capacity. The original firebox and combustion chamber was designed for the flame properties on how coal burns. Oil does not produce the same type of flame. Oil burning boilers need a very distinctly shaped combustion area to be efficient for heat transfer. All they did on the 4014 was to add an oil burner in the firebox. Nothing else was redesigned to enhance the conversion to oil. Horsepower may be the same (at best) but more than likely less than the 4014 was getting from coal.
I've heard that the estimations for Big Boys horsepower was very underestimated. Some independent experts say around 8,500 to 10,000 Peak horsepower with a full head of steam and under the perfect conditions. It's very hard to accurately estimate horsepower from Steam Engines. And Tractive effort is what really matters.
I agree
Sorry but the hp Is only 6.290 just because Is the biggest dosent minds it the strongest
[redacted]
Correct. I think the Big Boy had the most traction pull of any locomotive made, Steam or Diesel. It could pull 5 miles of coal cars on an upgrade. It took 5 diesels to take over its load when they retired the Big Boy.
@@pissedoff7243 this is completely wrong
Imagine if the PRR had made a 4-8-8-4.
Micah McGraw oh god...
Prr q2 is the closest you'll see
10,000hp
Many people dont realize they prr q2 weren't articulated either. So imagine doubling the size . Curves would be a problem though with such a massive boiler on the articulated frame.
@@jordanalexander615 Why PRR didn't make any Mallet? If most of its duplex were articulated it would avoid many problems
It’s funny how that used steams logo...
This should be done by tractive effort, not horsepower. Tractive effort is what you need to start trains with, horsepower doesnt really matter as much unless you want go fast. I mean, n&w 611 & santa fe 2926 are way more powerful engines tractive effort wise than 4449. Some of the engines on this list wouldn't ever operate above 50, if that, so horsepower is irrelevant.
You are mistaken. Horsepower is needed on grades in order to keep the consist moving according to timetable. If you keep applying the same horsepower to the trailing tonnage on a grade, you will slow drastically, maybe even stall. In order to maintain track speed, your boiler must be capable of supplying 3.2 times the previous horsepower that was applied on level ground. That is why diesels were introduced; they are so much more economical, and units that can be brought on line can supply the required additional horsepower, but no additional paid jobs are needed to man them.
You are correct regarding potential power output from the boiler, but it's the "where the rubber hits the road" that counts. All the power in the world doesn't necessarily account for slippage or weight on wheels. Steam engine wheel diameter as well as valve timing on the cylinders are like gears in a transmission.
And it's moot anyway--railroad locomotives have ALWAYS used tractive effort, not horsepower, since boiler output (pressure and flow) is finite and changes with time and load. You can't change history or experience. It's an industry standard.
Airplane jet engines are also rated in thrust (pounds), not horsepower, though they obviously provide both.
It's about torque
@@cherylwelsh5735 not entirely. All the torque in the world is wasted if it makes the tires spin, and steel tires on locomotives do that with alacrity. It is adhesion; the adhesion must be just that much higher than the tractive effort applied via the piston rod to the main rod and main crank. Once the reverse is true, all that torque is misapplied...and wasted. And spinning does no good to the stay bolts, butt joints and welds, and to the fire if it arises from a coal bed because it causes rapid thermal cycling.
I know the Yellowston has better tractive effort then big boy
Really?the southern pacific class ac-12 has 56,000 hp and it's placed number 8?Hahahahahhahah!!!I know it's a mistake it has 5600 hp.
I thought so, I was just sitting there thinking does this really say 56,000 hp, then why is it 8th.
56000 horsepower is what you see in cars which break the sound barrier
Depends on whether you measure horse power or tractive effort.
Horse power does not mean a thing on a steam engine, (tractive effort)
Wasn't NYC's 'Super' Hudson around 6600/6700hp?
I had heard that the Niagara"s boiler pressure had to be restricted to 265 lbs. as they would bend side rods.
The PRR T1 steam locomotives are my first favorite duplex and streamlined steam locomotive. It is a beautiful steam locomotive. They were built for mail and passenger trains. There is going to be a new T1 being built, it's being by the T1 trust, it's going to be number 5550.
This train isn't that fast or powerful, but you could've at least just included the Polar Express, I mean, it's such a good and majestic train.
Some of the wheel arrangements on some of the engines surprised me... I never thought 4-4-4-4's existed.
If it's not ordered in HP, big boy is the strongest.
Shut up u know nothing about trains.
@@TheWeavingBagel ur dumb
@@Absolut531kmh nope the virgian triplex (2-8-8-8-4) is much more powerful than the bigboy
@@TheWeavingBagel how long does it pull?
@@TheWeavingBagel and wtf is a virgin triplex? There's no such thing. Don't make things up urself and care about ur family instead.
Big boy is the largest and most powerful steam locomotive ever built and in existence.
The Y6B with its small drivers could handle the most tonnage of this lot, but was a compound articulated which meant better efficacy at speed, but less super heated steam sent directly to the front drivers. Running in simple articulated mode, the steam kicked up to 315 psi, a traction booster placed in the rear truck, and some added ballast in the frame, the unofficial Y6"C" class would have started a heavier train than any of these by far. The N&W A class could have easily been on this list on a different day and could have produced more horse power than the Y class and perhaps others on this list. The DM&IR 2-8+8-4 was probably the biggest overall. Notice that the most powerful locomotives had "lagged" fireboxes which meant that the grate area was completely behind the drivers and placed lower/deeper with a slope. A level shallow firebox is a big disadvantage the Big Boy has to some of these others that its fans never seem to take note of. There is more robust combustion in a lagged firebox with the same given grate area. For that reason, the mention of some of the PRR locomotives may well have merit. The PRR did not like articulates, perhaps with good reason, but it is a wonder how some of these non-articulated beasts ever went around curves without doing a lot of damage. One should also realize that the dynamometer cars back in the day could be off by as much as 1000 horse power. They were not very accurate which makes this whole argument more fun. The Allegany had perhaps the most grate area and heating surface area. It was an obscene rail bender with much praise about its power and its actual weight a dirty secret kept by Lima for obvious reasons. The Allegany was also found to be better at fast freight just prior to its retirement than on coal drags, its intended application. Its drivers were too large to be a good mountain slugger. I would not argue that the PRR Q-2, a 2-4=6-4 ridged frame beast, did not have some big power. However, that 7987 horse power was indicated in a static test and not with a dynamometer car and that "treadmill" was probably just as flawed.
The GS-5s were more efficient than the GS-4s, so im going to take a guess and say not much research was put into this.
Connor Taylor Not much.
Connor Taylor
Sunbeam 90
Bruh 😂 what research he just copies each loco's hp then just ranks them
YAA LES GO BIG BOY
Thumbnail is incredible 😁😁😁
bigboy has roughly 7000HP not 6290
wrong
Yea they low balled BigBoy!
You do get that there were still y6b’s which made just as much power as big boys while 2156 is just a y6a
The Y6a's were rebuilt to have the same specs as the Y6b's, so they were performance wise the same locomotives.
Wow, they made the Steam logo into a real thing.
you should specify if you are using restored/under restoration locomotives or any. Historically the SP GS class northerns wouldn't even rank on the top 20 most powerful.
Nice list but if were about tractive effort I would put the 2 10 10 2 Virginian at the top 176000lb tractive effort only mallet to exceed the jawn Henry steam turbine and triplexs at pulling power
Thanks for sharing and watching
true
Yeah, and it had a top speed of 12 mph because its boiler couldn't put out any more steam.
True, with comparatively small drivers and being fairly slow.
There was no mention of Norfolk & Western J Class 4-8-4 number 611 which is more powerful than Southern Pacific GS-4 Lima built 4-8-4 number 4449. Both of those steam locomotives and Southern Pacific cab forward AC12 number 4294 which The steam version of the diesel locomotive that took its place.
Honestly I don’t really agree on this
Not researched well at all, sorry man
So you're ignoring the Belgian Quadroplex that pulls at 1225.7 KILOnewtons nearby TWICE as powerful as the Big Boy... 🤔
I would like a longer version of this vid which gives more technical details. Judging by the comments, I'm surprised this vid didn't get more dislikes. Little effort was put into it.
Will someone tell this guy that big boy 4014 literally pushed a freight train with its own passenger train having more than 115 freight cars
How about less wipes and more photographs that you can SEE?
The number 1601 sits in Henry Ford Museum in Dearborn, Michigan, though it was smaller (by only about 3 feet), the Allegheny Steam Locomotives WERE More powerful, designed to conquer the Allegheny Mountains, it is truly awesome to have photos of that in person
I'd put in BigBoy any Day! Allegany was a disappointment. U Der performed.
true
Wow so powerful
And union pacific big boy is the worlds strongest steam locomotive because even though it doesn’t have the most horsepower it has the strongest pistons and heaviest weight load of all steam engines Therefore making it the worlds strongest steam locomotive
Wrong. There were a number of steam locomotives that had more pull that the Big Boy.
he is just a meat rider for bigboy@@markantony3875
Somebody forgot to mention 611
They apparently done zero fact-checking. And 0 proofreading
No way a 4 8 4 Niagra is 6700hp. Allegany, Big Boy, Yellowstone, E1 top 4 in my book. He never mentioned the E1
Considering the Niagra ranked number 1 in over all efficiency world wide I'd believe it
@@thelostcat24 Except it wasn't.
This could have been SO much better! You've managed to make 10 interesting locomotives boring accompanied by AWFUL pictures.
Wow I thought the Allegheny class was the strongest class of locomotive. But it turns out the PRR Built the strongest locomotive. (In America)
Wrong. This list is mixing up calculated Indicated HP (calculated at the cylinders) PRR S1 vs Drawbar HP measured in actual running at the back of the tender C&O Allegheny. The S1 indicated HP was calculated will not moving at the Altoona PA test plant, while the Allegheny's HP was measured from drawbar pull while moving pulling a test train. Indicated HP does not take into account the HP needed to move the locomotive and tender, rolling resistance from the wheels on the rail, machinery losses, or aerodynamic losses. Drawbar HP takes all these into account. The Allegheny was much more powerful than the S1.
Bruh that guy is just copying the amount of hp in each loco and then just ranks them from sites that he reads then he just pastes them. also hp doesn't indicate the power of a loco it's tractive effort and we never got real sources that could tell us the real tractive effort of each loco.
your cab forward HP is wrong. SP records I've seen list as 6000.
Why is big boy at number six .
Because u stupid big boy fans think that it's best anything also u aren't railfans
U know nothing about trains u big boy fans
* looks at video for "strongest" *
*wonders why triplex isn't on there somewhere * "B O I"
While the thing is. Why is everything done in horse power? I believe locomotives use tractive effort instead of horse power.
They use both, however reactive effort is what is mainly used to measure the locomotives “power”
yeah the triplexes have the best tractive effort.
This should be done by tractive effort, not hp
Commentor1 just because it has that power does not mean that it is put towards the track
No i just want to share fun facts about the trains that ran all over the world. This comment was purely coincidencedentle
Commentor1 because, if it has a million horse power and very little tractive effort, the wheels would just slip
Tractive effort was always taken into account over hp. There's a reason most steam locomotives have a posted tractive effort but their power output in hp is usually not listed. And he's missing a lot of powerful locomotives that still have more power than an SP GS locomotive.
YUP!! N&W Y6 had 170,000 LBS TE at 6 mph.
why no Erie triplex?
They weren't high horsepower. Plus they were mostly an experiment that proved to be a failure. The boiler couldnt produce the steam for high speeds. So they were regulated to pusher service
Triplexes had ridiculous amounts of TE with 6 high pressure cylinders, but your right about the firebox not producing enought steam. If they had made the firebox waaaaaaaaaaaaaay bigger and maybe split the cylinder between high and low pressure, maybe it could've worked
Cuz this is ranked by hp not power and Erie triplex didn't have the enough hp to enter that video
Although I think it had more tractive effort Than a big boy
big boy: *you dare challenge me?*
Yes, because it was overrated.
Oh yea
Lol, why are they using Valve/Steam's logo in the info cards? Somebody just googled the word steam and thought, "Eyyy guess I'll use this graphic." XD
You're telling me that out of all of the biggest and most powerful steam locomotives ever constructed by man, including the 4884, is that the "AC 12 B" is the most powerful loco man has ever constructed and made 56,000 hp? WOW! Don't believe you. Check your stats before posting.
Bailey Quick. It happens.
I always thought the 9F locomotive was the second strongest and Big Boy the 1st
The size of the train doesn't matter, its the way steam pressure is built up and released that counts. But I am suprised that neither the 9f nor the P2 were on this list. Its almost as if the video creator only focused on american locomotives instead of following the title and getting locomotives from around the world.
No british engine would be on this list. Ever. Maybe the u1 class, but that's it
The Union Pacific 4-8-8-4 Big Boys transmit 6290 Horsepower at 41 MPH so it may be stronger than it is,and you got the facts for the Southern Pacific 4-8-8-2 AC12 Cab-Forward Wrong,it can transmit 6000 Horsepower. But I do not know how much HP the Pennsylvania Railroad 4-4-4-4 T1 has as it has more than 6000 Horsepower.
The T1 was 4600 to 5000 DBHP when measured the same way as the Big Boy. This list is BS. They are mixing up calculated cylinder HP to measured drawbar HP. It is an apples to oranges comparison.
Oh these are all American steam locomotives (surprising no one)
Does anyone know what the most powerful steam locomotive in the world is and how much horsepower it produces?
forget horsepower (tractive effort)
The C&O 2-6-6-6 Allegheny had the most horsepower at the drawbar. They had a confirmed 6,700 HP continuous drawbar HP reading at 45 mph. They are often cited as 7,498 HP at 45 mph, but that is just an outlier on the scatterplot of its drawbar pull and not reality. It was just a momentary reading as the locomotive was coming out of a sag in the track that resulted in coupler play between the locomotive and drawbar measurement car.
@@jamesvance8456 Steam locomotive tractive effort is a measure of static pull at 0 mph. Tractive effort is not a measure of power.
@@markantony3875 Oh, Really
@@jamesvance8456 Yes really. Tractive effort is static pull. Power always has a unit of time. For example, the starting tractive effort of the Big Boy is listed as 135,000 lbs. That is its starting static pulling ability. If the train has more that 135,000 pounds of total rolling resistance, the Big Boy will not be able to move it. Tractive effort is related to horsepower (at the rail) by the formula: HP= (Tractive Effort x Speed) / 375. Speed is where the unit of time comes in, such as mile per hour. The Big Boys maximum power ~ 6,200 HP (with a clean boiler) happened at 38 mph. If your work the formula to solve for TE, you will find the Big Boy was producing 61, 184 lbs. tractive effort (6,200 HP x 375 / 38 MPH). If the train had more than 61,184 lbs. of total resistance (rolling resistance + air resistance) at 38 mph, the Big Boy would not be able to maintain 38 mph. It would slow down until its pulling ability and the total resistance balanced out.
A few things to take from this: (1) A steams locomotive's listed starting tractive effort is not a measure of power while moving. (2) A steam locomotive's performance is very sensitive to how clean the boiler is. In typical operating condition, the UP considered the Big Boy to be a 5,800 HP (at the rail) locomotive.
This list is BS. They are mixing up calculated cylinder HP for some locomotives with measured drawbar HP on other locomotives. Apples to oranges comparisons.
I have to disagree. Pennsy had a CC locomotive. An 0-8-8-0 that was so powerful it ripped cars to shreds. It ended up in pusher service. It was scrapped before it was tested for HP and TE. The T1 had footing issues. It was very hard to start a train but at speed it could pull.
Going by HP is not very accurate. Some ratings are for slow speed while others were gathered at high speed using a dynomometer car. Not all dyno cars were very accurate.
The Union Pacific big boy 4014 is my favorite steam locomotive and ac6000cw is my favorite diesel locomotive.
Wow 😳 very informative
N&W 1218 is not a Y6 class, its an A class.
I painted a picture of this 4ftx36 in oils.Not for sale.
I have never seen these numbers anywhere else. Only measured drawbar horsepower should be used. Theoretical cylinder horsepower based on theoretical top speed is ludicrous. Measured top speed - world record - for any steam loco in the world is only 125 MPH.
What about the frisco 2-10-0 they were built to pull heavy freight trains like #1630 pulled 135 coal hoppers
Who gets mixed up with niagra and FEF-3? ✋me
C&O M1 steam turbine generated 6000hp
The h8 c&o had slightly more power than the Q2 but the dynometer car probably wasn't calibrated right at the time of the testing. So this isn't accurate than
0:17 it has duel tenders
yeah its an extra water tank for long distance use
what about the beyer garratt 6029?
Class Q2 have more horsepower than the ACS-64 and SD90MAC or AC6000CW!!!!
But not the "tractive effort"
this should be by tractive power, in that case the yellowstone would win
Nice video. But I suggest you replace the NYC Niagara with the more powerful NYC Mohawk, which holds the record for the most miles traveled between shop visits and is considered the best steam locomotive ever produced. The Big Boy has the most tractive effort which is HP combined with weight to produce the true pulling power of a loco. The Norfolk Western 4-6-6-4s and UP Challengers should rank 2nd and 3rd after Big Boy. The PRs T-1 was a one off experimental loco and was never a success. Note, some German locos equaled the NYC Mohawks.
Thanks for your ideas
no comparison between Big Boy and Y6B
The Allegheny was built specifically to beat the N&W and to be able to start from a dead stop with a full load at the steepest gradient, .57%. Allegheny was 6700 to 6900 HP with an instantaneous HP of 7498 at 46 mph.
@@michaelconfoy2862 true!
This is a very, very flawed "Top Ten" list.
Should have been named Top Ten Most Powerful AMERICAN Steam Engines. There are lots of British steam engines with great power that should have been on this list.
Fallout Brony They may be powerful but not more so than the North American articulated locomotives. Most of them spent their days hauling mile long coal and ore drags at low speeds up steep grades. They can’t compete.
I'm not denying that but still the power and traction of some of our locomotives deserves a mention. BR Stand Class 9F, LMS Princess Coronation Class and the highly reliable LMS 8F Class to name a few.
Also PRR I1sa, don't forget that Britain is tiny island nation compared to the US with hills and mountains and no long flat open lands for miles upon miles of flat ground. We couldn't have your great big monsters so we built our engines so they could work on our winding tracks.
um, no. No. No. No. Seriously What have you been drinking?. British steam HPs in service topped out well well below 3000. If you are talking power per ton of engine weight you are closer but even then you need to look to M. Chapelon in France for actual world beating performance.
@@prri1sa318 very true -put them on the "Blue Ridge" with a 100 cars of coal and see what they will do.
@@jamesvance8456 They''ll roll back towards Richmond.
what music is this
Didn't most powerful steam locomotive go to the Y6B's?
Ginger Drizz Yep
yes
No. The Y6b was only around 5,000 HP at the drawbar. It did produce more starting tractive effort (pull) than the Big Boy. However, the Y6b had a smaller boiler, so it lost power quickly as speed increased.
The Chinese qj isn’t on this list?
Number 8 engine HP is wrong
From what I know, all the other steam locomotives in this list can't pull a 5 and a 1/2 mile long train like the Big Boy. So I disagree with this list.
Big Boy can pull this (on level track)
@@jamesvance8456 Prove it. You can't. There is an equation called the Davis Formula that show the power needed to pull a 5 mile long train. Put in the empty weight of 5 miles of railcars. The Big Boy can't do it. Even if you loaded up the head end with enough Big Boys (or any other locomotive) you still couldn't do it because the drawbars would pull out on the cars.
OMG...their ARE engines stronger than big boy... :0 and one of em isnt even ARTICULATED!?!?!? my life is a lie
There are only two with a Higher TE. Allegany is all hype.
still more powerful by a thousand hp @@floydrandol2731
what the fuck dude big boy is hella strong and you put it at #6. WTF.
It's number 6 in hp
But 4 th in power
'Top Ten Most Powerful Steam Engines In The World (America)
Because u stupid all the top 10 are Americans
We have the strongest top 10 engines so..
this guy clearly doesent know what hes talking about
Sponsored by steam?
im very supprized that the challenger and the big 2-10-2 and up aren't on there
The most powerful loco ever built in the UK was the NSWGR AD60 class Beyer-Garratt and even it doesn't get a look in. British locos are fast on flat ground, but not overly powerful.
01:48 ahh yes.My favorite train called big boy
lol, i think dm&ir yellowstone is mine favorite!, but the tender of it look like the big
boy's tender, right?
At 1:13 56000hp 😂😂😂
You did a mistake you put one more zero
This list is so messed up and the people who wrote it are so clueless, they could have said 560,000 hp and they would have thought it was correct.
I thought big boys put out about 5 to 7000 hp
6500 max hp
Isn't the Yellowstone is the most powerful locomotive?
No
Bruh steam engines aren’t measured in horsepower for power
HP is a measure of power. So what are they measured in?
@@markantony3875 tractive effort. Which is how much a locomotive can pull from a dead stop. Some engines have less horse power but can out pull a engine with more. Tractive effort is a combination of power, suspension and weight distribution Horse powers means nothing to railways really.
@@Heisler146 I asked you a loaded question to see what your response was. Tractive effort is NOT a measure of power. It is a measure of static pull only. Power always has a unit of time involved. Tractive effort has no unit of time involved. For example, you will see a locomotive listed with a starting tractive effort of say 180,000 lbs. That is not power, because there is no time unit involved with pounds. However, Power can be related to tractive effort by the formula HP at the rail =(Tractive effort x Speed)/375. By using the formula you will see a locomotive producing 3000 HP (at the rail) at 10 mph will be producing 112.500 lbs of TE (i.e. pull). A locomotive producing 4500 Hp at the rail at 10 mph will be producing 168,750 of TE. The later being impossible for any locomotive short of a new AC drive high adhesion unit. Horsepower and adhesion mean EVERYTHING to the operation of a railway, because horsepower is what gives you the pulling ability to move tonnage at speed. This is as true today as it was in the steam era.
@@markantony3875 “I asked you a loaded question” okay Ben Shapiro.
@@Heisler146 It worked.
Comparisons for any type of parameters is obviously the choice of the presenter. And the presenter of this yet another 'top 10' video in no way, shape
or form made any statement that downplayed the importance of tractive effort. Indeed, the presenter never mentioned tractive effort at all. And there's good reason not to do so. The list of these locomotives with such differences in design and function would make comparisons by tractive effort a meaningless exercise. Almost like comparing an airplane with a submarine. 2-8-8-4 steamers are engineered and designed to have more tractive effort than a 4-8-4 steamers, regardless of the amount of power of those locomotives.
Besides expressing power at the treads of the wheels, tractive effort includes a combination of variables such as weight on drivers, size of drivers, factor of adhesion, the latter of which is effected by the number of driving wheels. They amount to dealing with frictional forces and mechanical advantage. But power is more elemental. It is what it is. A Big Boy was designed to operate with 300 psi boiler pressure. If one was fired up to only 170 psi it might have the tractive effort to move its large train but perhaps no faster than walking speed. And ironically, it may have less wheel slip due to not having the power to overcome the frictional forces such as to create wheel slipping. But to get a 5k ton train up to 45 mph on level track requires power. A Niagara pulling a 1000 ton train at 60 mph and then needing to get its speed up to 75 mph requires power. The limitations there are not about tractive effort but about the maximum power curve output.
Which is the best
Big boy
@@lhenkhantus2588 shut up the y6b is the strongest
Funny, they're ALL AMERICAN. What about the LMS Lizzies? They have a TRACTIVE EFFORT of 40,286 lbf.
So do the Princess Royals, but that's not very powerful in terms of steam locomotives
40 ,000, won't pull a kitty car
These machines over 100k dude
Lol 😂😂😂😂😂 XD they all are Americans because they all can pull more than 100,000lbs lol
Some of this list seems out of order a bit because the UP turbine was the strongest engine in America at 7,800 hp I believe.
Power wrong that cant be that power southern pacific 4294
They low balled BigBoy and Allegany is way over rated and under performed. Ed King Sumed it up.
I see they are all American the Greeley a4 liners should be there
A4s weren't that powerful
I love the lner a- series yet I can admit that ,next to a big boy ,it looks like a lbsc terrier or l&y pug
I like big boy
No one cares about Ur choice
No joke please disregard this video its highly inaccurate. Do some research, dont spread false hp ratings please. Some are accurate but some are ridiculous claims. Such as the northern being more powerful than the large articulated ones, come on now
the northern has more hp than articulated ones. YOU should do some reasearch. however the articulated ones have a greater tractive effort so they can pull more. hp is generally connected to top speed.
@@TheWeavingBagel maybe the smaller articulateds but not the big boy , the Allegheny, or the later generation challengers. They all had 6000 and up according to everyone source I've found. The Niagra were the most powerful 4-8-4s 6600 horsepower but definitely not called a northern.
How is BigBoy not on first place. Its the worlds largest and most powerful steamlocomotive with 7000hp
Man the big boy only has 6.290hp just because its the bigest dosent mind its the strongest.
@@isaacnuri8389 its not even the biggest. N&W TE-1 Hawn henry was about around 150 feet long while the Big Boy is about 120
It is because the Big Boy is not the largest nor most powerful steam locomotive ever built. The C&O H8s were heavier, the Jawn Henry was much longer, as was the C&O M1 and the PRR S1's; the H8s and PRR Q2's had more horsepower (so did the S1), and in terms of tractive effort the Big Boy is 16th on the list. BTW, the Big boy comes in at 6300 HP, not 7000.
The one distinction the Big Boy IS at the top of list for? It was the biggest and heaviest locomotive built at the Alco plant in Schenectady, NY. The story is that an Alco worker chalked the words Big Boy on the smokebox door of the first engine built, and the moniker stuck.
When UP 4014 goes back into service shortly, it will be the largest and most powerful SURVIVING steam locomotive. All the others are either in museums, on display or were scrapped long ago.
not true, largest but not most powerful
@@isaacnuri8389 true
Southern Pacific 4-8-8-2 AC-12 #4294 is WRONG. There is NO WAY a steam locomotive could produce that much HP, unless it is really big.
It did produce that much hp
Have heard around 6,800 documented.
🚂
Big Boys are the largest in the world
Heaviest, but not largest
C&O's "Allegheny" 2-6-6-6???
@@Caje-zf8md by pulling power
Lol 😂 who cares about size it's about power.
Wow southern Florida I learned many of u and also it isn't even the biggest
The niagara is my favorite
This is fake
No lNER STEAM engines
"Strength" and "LNER" do not combine in the same sentence 😂
Baltic 144 Productions sorry
Fake
You should have named this video "The Top Ten Most Powerful Steam Locomotives in the USA", not in the world ^^
The big boy from America is the most powerful steam train in the world
@@sc1338 It is the most powerful OPERATIONAL steam locomotive in the world