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Golden Croc
IWrocker
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Comments by "Golden Croc" (@GoldenCroc) on "American Reacts to Why European Trucks Have So Much MORE Power Than American Trucks" video.
True, but any Newtonmeter number in isolation doesnt matter, as opposed to a power number.
8
@XtreeM_FaiL Thats a common thinking, but though it is kind of correct it some circumstances, it is a bit to narrow, and that leads to misunderstandings that perpetuate the myth that torque as an isolated number matters for propelling vehicles. It does not. Better would be to say that Torque is a factor if power in rotating IC engines. That different viewpoint makes a difference. Its for example very possible to make lots of power with almost no torque, its also very possible to make lots of torque with very little power. Only one of the two matters when it comes to propelling anything, and that is of course power. Some notable examples would be a jet powered car, a maglev train, a cordless drill, and a fuel powered RC car engine, all extreme examples in the torque/power equation that hopefully serves to illustrate my point quite well?
7
@martinohnenamen6147 I think you misunderstood my post, I am not strictly talking about Metric vs imperial units at all. It was a bit of non sequitur answer, I admit. I was talking about the myth that still lives on that torque numbers in isolation matters for vehicle propulsion, when its only the power numbers that does. Cheers.
4
@UltraCasualPenguin Its a sideeffect of longevity, fuel consumption and power targets, i.e to get the consumption they wanted at the necessary power level, they had to go with a BIG engine. And big engines give a lot of torque, by pure physics. Often the high torque is even an unwanted sideffect, and is limited in software, like in many cars.
4
@bentchristiansen8795 See my previous post, there seems to be the same misunderstanding going on here. cheers.
3
@UltraCasualPenguin Indeed, the thermal efficiency of very large diesels are often above 50%, giving very good fuel consumption for the specific power usage. Just as I said above. Engine spec sheets often quote gram fuel used per kwh power output at different rpms in a graph, perhaps you can do the math of the engine you mention and compare it to a typical modern car engine and then a 1960s 50cc petrol two stroke. Could be fun and you might find the numbers illuminating. My guess would be 35% and 20% thermal efficiency at best rpm.
3
Yep, not the best video. Also, torque figures doesnt matter, thats an old misunderstanding. Power is what does.
3
0:53, thats actually a myth, definitively if going by the wording. "Torque" never matters in any vehicle, only (horse)power does. What people actually almost always mean when they say "Torque" is really "low rpm power". Not the best info source video, sorry, since he kept talking about how "Torque" is what matters.
2
It Didnt seem to get a single "stat" right?
1
@leoevs441 OP is quite right, torque figures having any direct influence is an old myth.
1
@misterflibble9799 I see what you are getting at but its just power all the way.
1
Actually, only horsepower matters, since time always is a factor. But I see what you were getting at.
1
@vHindenburg Indeed. Lots of people misunderstand the physics behind what propels vehicles. Its understandable, its not that intuitive.
1
@vHindenburg The example with locomotives is possible I guess, but again they misunderstand what power is, and also disregard gearing. A steam lovomotive can give power from literally 0 rpm because of how the engine works. Those 5000 vs 7500hp figures are presumably the max power ones, which may not applicable in the "can pull more" example... So yeah. You are quite right.
1
@mikldude9376 Funny thing is that the answer is actually yes, it would do just fine. "Torque" is a simply a factor of power as made by rotating IC engines, and over time people have gotten a correlation as a causation, just as with many other things. "Torque" as per the definition of the word, is a "byproduct" in this context. Nothing unusual about that, happens to lots of things, and in this case its in reality power and power alone that matters. What most people really mean when they say "torque" though is "low rpm power" so their thinking is reasonably correct, even if they use the wrong word.
1
NA vs FI, not the best comparison really. Its all about equal these days.
1