Quote:
Originally Posted by pnwdan
I don't necessarily agree with this in terms of drivetrain. If the same engine is modified to create more power and it remains coupled to the same drive train, this would not apply.
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You are thinking of inertial losses, not frictional.
Consider what is actually happening in the system, at a moment frozen in time. The power may as well be torque (since power at a given moment equates to torque). More than that, torque is effectively a rotating force. What this means is that the drivetrain components are transmitting force from one part to the next. Follow so far?
Alright, so that force transmission happens because of friction. And friction is proportional to the forces applied. Its a touch more complicated that that, as it involves calculating the normal forces at the tangent angles between gears and such. But the end result is that as you increase power, you increase the friction within the system.