LOL I thought you were on my side Cyd. Point by point.
Torque is a force, a rotational force, it can be static, a coil spring in a watch has torque even when its not doing anything. It has no frictional losses I have been talking about the basic torque generated by the engine at the flywheel, a fundamental characteristic of the engine.
Torque only makes power when it moves If say an engine makes 100 units of torque at the flywheel, in a car that may produce 100 units at the back wheel in first gear 70 units in second 50 units in third, So to say you increase an engines torque by changing gear is not true you are changing the torque at the wheels. the engine torque is the same and in fact power could be the same throughout Power is force X Distance X time, torque is only the force bit. You cant have power without torque.but it also needs to move.
On a rolling road, usually done at max throttle, torque climbs at first as the engines volumetric efficiency increases ( it fills the cylinders better ) then eventualy falls because at higher revs there is less time to fill the cylinders so they fire at less than max charge. Power can keep increasing due to the higher revs ( increasing the X distance part ) more than compensate for the reduction in torque. Power to eventuallly falls as the increasing lack of charge in the cylhindes takes it tolle. The printout shows two curves but remember each curve is measured in different units.and scale.
Electric motors have different caracteristics, torque is max from rest and decreases as it gets faster but power is roughly constant. No need to build up revs to get torque. And yes they can have max torque and no power, Its just using a lot of juce to produce a force thats going nowhere.
Its not t*** really. In fact Im not sure what you mean by t***
Edited by Stanb Sevento on 25/04/2017 at 18:08
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