ORIGINAL: DarZeelon
Spinning a 9x7 APC prop at 25,000 RPM would, according to the PropPower
calculator, require 4.26 HP.
Can you please name the high performance .91 engines that you were
referring to, which can actually make this HP AND be capable of
spinning at this RPM?
My OS .91 D/F engine could do that easily.
FBD.
