RE: GP J-3 Cub, 40 size, Anyone???
It's a great plane, very good kit. I have flown mine for 4 or 5 years with a Saito .56 and feel it is the right amount of power for this plane . Prety sure i'm using an MAS 12x6 prop. Spent the few extra $$s and covered it in worldtex. When i feel like a nice relaxing flying session it fills the bill. Good luck with yours.