ORIGINAL: joeshmoe_44883
I' ve got plans and am getting supplies to build a plane called the vertigo. it uses an os 46 vxdf spinning a 9x6 prop in a shroud. the desinger of the plane is in here somewhere, i've never heard of anyone breaking props with it so who knows...
Have a look at the hub on a 9" diameter APC sport prop, now realize you will need to drill it out to 3/8" in order to use a "short shaft adapter" since the engine's shaft wont reach through the prop.
After you have drilled that large hole in that small hub, it doesn't leave enough meat to keep it together. Could be deadly.
Pylon prop hubs are bigger and will hold up, but the tip are thin and tend to fly off at high speed especially after a hard turn. Only the most aggressive pylon prop will hold the engine back, something like a 8.8X 9.5 or 8.8 X9.25. A carbon prop like the 7.4x8.1C is a better choice turning it over 25,000 rpm, APC discontinued a better carbon prop a year ago so this is what's left.
Could a 9X6 sport prop hold up? Sure but not at this engine's full potential.