Originally Posted by särpet

Itest run today rebuild .45 Fox,engine is my father,he learn fly rc planes with this engine early -80.
Many crash and hard landings.
Same engine was used to power my first warbird royal/marutaka f4u corsair early -90 it crashed couple of time too.
New bearings and piston ring.
Jxf 11x6 prop 10%nitro 20% castor,irvine carb and in cowl muffler 12150rpm. Idont know is it good or bad numbers?
Idont found original muffler.