Torque = Hp x 5252 / Rpm (5252 is a constant) - still a valid formula ?

[79-TA]

OK! Figured out how to attach the curve!

I clearly don’t understand this, hence my OP and I do appreciate you guys trying to explain it. I know this formula is tried and true and has been since the invention of the horse.

But then I see a curve like the attached and hopefully you can see why I ask the question. The HP curve rises as the torque curve remains flat.

Thanks for posting the chart. The 5252.113 unit conversion is specific to ft-lbf and horsepower.

For Newton-meters and kilowatts, the formula would be as follows:



KW = Tq (Nm) * RPM / 9549.3