Theylist a 22x40 prop for that engine. When run at 8500 rpm theabsorbed power is 33 hp, tip speed about 0.8 mach (noisy!), and theplane should be capable of 500+ kmh (300+ mph) WOW!
ORIGINAL: Kweasel
I bet that 32 inch prop spinning 8500 makes a lot of racket.