Stupid hp to thrust question

Mark wrote:
Does a prop turning at 2300 rpm on a 150hp motor produce more thrust than a
prop spinning 2300 rpm on a 100 hp motor ?




Assuming the same prop on both engines, then no.

A spinning prop produces thrust by throwing air backwards. Based upon
pitch, diameter and airfoil design, a given prop can throw a given
amount of air at a given RPM. It takes a specific amount of power for
the prop to do that.

If the 150hp motor is at full throttle, then the 100hp motor won't be
able to turn the prop at 2300. If the 100hp can turn at 2300, then a
150hp engine will be under-propped with that propeller and will easily
redline (either that or the 150hp engine isn't producing 100hp).

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