True about the 3 blade and you and I were on the same page as I had thought about that too.
The only ones i know of right offhand would be the Master Airscrew and I was thinking the 15x7...but I just looked at their website and I also see a 16x8 as well as a 16x10 ! hummmmmm
Graupner used to have some great wide blade 3 legged ones but I dont think we can get those anymore? Whats your thoughts on the master sizes, a 15 or 16? I dont know if this little 20cc would be able to handle the 16's or not?