Rod Sheridan
New member
I have no idea, how discussions like this get started and how they morph into something totally different.
This was the original question:
And the answer is: Yes! As long as the engine revs at 6,000 rpm, it turns out the rated horsepower of 90HP. No matter what gear you are in, you would measure 90 hp ( times efficiency, of course) at the rear wheel. The torque is different in different gears, yes, but so is the speed of the rear wheel in different gears, means the horsepower is the same - again under the assumption that the losses would be the same in different gears.
No it doesn't.
The engine only produces enough power to match the load, plus drivetrain losses.
If load is low (flat ground, full speed in low gear), the engine power output is low.
If the load is high, (High speed vehicle, high load due to aerodynamic and frictional load) then engine power output is high.
Regards, Rod.