Drew,


My HP calculator; the PropPower from Pé Reivers, is a MS Excel spread-sheet.

The formula it uses to fill the thrust field is HP x 6...

This is not right.
Output has no direct relationship with force, which is only a component of it (the other is speed).

...Or we would not need to have helicopters...

A pylon racing prop, extracting the same amount of HP, at outrageous RPM, would replace the rotor...