Power To Weight

[mature gent]

Hi I have a mental block,what is the formula for calculating power to weight, assuming the weight and rwhp is known.

Cheers

Steve

[NZM.031]

well if you have a car that is 1500kg... and it has 400hp...

you divide 1500 by 400 and the result is how many kg's per hp..

so in this case..

1500kg/400hp = 3.75kg/1hp

you can do it the other way though and divide 400/1500 and the result is just opposite.. its how many hp/kg so it would be 0.26hp/kg..

it works out the same.

[Birds]

f you're calculating power to weight for purposes of meeting laws or regulations then you will most likely need to calculate flywheel power vs unladen vehicle weight from factory. RWHP is roughly equal to flywheel KW however.

For P plater laws, for example, if you want to work out HP/KW per tonne you need to divide power into vehicle weight (e.g. 150KW / 1200KG) and multiply by 1000. You will arrive at 125KW/tonne, the old P plater power limit for Victoria.