On 29/03/2016 21:04, Vir Campestris wrote:


This clearly shows you get more force by choosing peak power in a low
gear over peak torque in a higher one.


That's a no-brainer, anyway. Just as you can express engine power in
terms of engine speed (times) engine torque (divided by) a suitable
constant, you can also express propulsive power as road speed (times)
thrust at the contact patch (divided by) a different constant - but they
should equate to the same thing apart from transmission losses. So when
the engine is developing its peak power, you'll get peak thrust at the
wheels.

Having said that, it's not particularly useful unless you've got an
infinitely variable transmission because fixed gearing will only allow
max power to be applied at the road at a few discrete speeds - not over
the whole speed range.
--
Cheers,
Roger
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