Mark Schoening
Well-Known Member
I notice some engine conversions claim more "thrust" with their engines.
I always thought that with a given prop, a true 100 hp engine, of any type, would only swing that prop a certain max rpm.
Allowing for a given exact same HP engine, say, 100 hp either direct drive or with a reduction unit, swinging the same prop at 2700 rpm, would the "thrust" would be the same.
Am I missing the torque factor, or ?......seems the conversion wars are caught up in this "Thrust" thing.
Example: Assuming a true 150 Hp lyc swings a prop 2700 rpm, will a true 150 hp whiz-bang auto conversion with a reduction box also swing the same prop 2700 rpm and fly the same speeds? Take off be the same? Assuming same gross weight, same airframe.
I always thought that with a given prop, a true 100 hp engine, of any type, would only swing that prop a certain max rpm.
Allowing for a given exact same HP engine, say, 100 hp either direct drive or with a reduction unit, swinging the same prop at 2700 rpm, would the "thrust" would be the same.
Am I missing the torque factor, or ?......seems the conversion wars are caught up in this "Thrust" thing.
Example: Assuming a true 150 Hp lyc swings a prop 2700 rpm, will a true 150 hp whiz-bang auto conversion with a reduction box also swing the same prop 2700 rpm and fly the same speeds? Take off be the same? Assuming same gross weight, same airframe.