RE: Best Prop for easy takeoff from grass
I agree. Big, light weight, tires should help (at least 3" diameter light foam), They may look kind of funny, but should help.
And generally you'll want larger diameter/ smaller pitch prop to shorten the take off roll. But it may well depend on the engine. Buy the 9X6 and the 10X4 at least, then try the 10X4 first.
Dennis-