I don't see why this thread continued past the first reply with the "coefficient" theory. To simplify this even more, lets say you have a box that you are pushing and there is friction coefficient of k. If you push it with x newtons, then you will lose kx of the force you applied due to friction. If you push it again with x+25 newtons, you will lose k(x+25) of the pushing force. There is a coefficient similar to this friction coefficient in your drivetrain. You could think of x as your drivetrain loss in the case at hand. I know this disregards Jason's post on different RPMs, but i was just trying to simplify this as much as possible.
the conversion from energy into useful work is non-linearly efficient, just like drag doesn't linearly increase either
no real life application is perfectly linear, but my simple example was meant to be just that, simple.
enjoyrth wrote: no real life application is perfectly linear, but my simple example was meant to be just that, simple.
and since you missed it I did mention reducing it to a percentage is adequate, but each car's number will be a little different, it wouldn't be unreasonable to assume >12% for a 2wd and >18% for 4wd and just leave it at that
simple thouht a tranmmison send your horsepower through gears that change ratio's. i have no clue but im guessing at say 50 your wheels are turning at alot more than say 2500rpm so in the conversion to a higher rpm you lose power. if you had a transverse motor and the flywheel was geared direct to the axle with some sort of clutch involed i wonder the differance between flywheel horsepower and wheel horsepower. just a random logical with no proof thouth.
I agree with the above discussion but mass has a play here. I couldn't even begin to qualify how much compared to friction but I would think it would be quite significant overall.
One other thought that hasn't been mentioned. Absorption loss. IE- play/flex in connecting parts. ( rubber mounting items that connect to drive-train components) The absorption of power into mounting parts, shouldn't be overlooked.
Just tossing it out there. :wink:
Just stand back and throw money.
Performance costs money.
Reliable performance costs more.
I agree with the above discussion but mass has a play here. I couldn't even begin to qualify how much compared to friction but I would think it would be quite significant overall.
One other thought that hasn't been mentioned. Absorption loss. IE- play/flex in connecting parts. ( rubber mounting items that connect to drive-train components) The absorption of power into mounting parts, shouldn't be overlooked.
Just tossing it out there. :wink:
that would be relatively limited and would not change significantly with rpm or torque
so therefore why do yo lose horepower through a trans and a diff? Exactly why stated because those gear are some what heavy and you need to spin them that horsepower so you have used you horesepower. therfore you have less to accelerate/spin your wheels/tires. seems a perfectly logical thought. the give/play in your motor mounts,trans mount, diff mout specifficly the rubber parts would i think cause you to lose power for a second maybe slightly more until they reach the end of there play. for example a full throttle 2 gear downshift would cause the driveline to shift in its mount. therefore robing horsepower durning that movement.
rc10ps85 wrote: so therefore why do yo lose horepower through a trans and a diff? Exactly why stated because those gear are some what heavy and you need to spin them that horsepower so you have used you horesepower. therfore you have less to accelerate/spin your wheels/tires. seems a perfectly logical thought. the give/play in your motor mounts,trans mount, diff mout specifficly the rubber parts would i think cause you to lose power for a second maybe slightly more until they reach the end of there play. for example a full throttle 2 gear downshift would cause the driveline to shift in its mount. therefore robing horsepower durning that movement.
if that was to me you misunderstood, I agree with all that, it was the loading of the chassis and bushings that's not important
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