Originally Posted by
GallopingGhostler
They will turn bigger props, but I found a caveat to that. You may have to go to wood props, as the plastic ones have too much inertia. My Enya .09-III TV was difficult to adjust the needle valve with an APC 7x4 prop. I went to wood, and it was a completely different animal. It put out quite a bit of thrust on older Top Flite wood 7x6, IMO give the sport plain bearing Schneurles a run for their money.
Sounds like you changed two things at the same time there...?
An APC 7x4 is a little too light load for the Enya 09, in my experience. Try an APC 7x5 or 7x6 for a better comparison to your wood prop.
The 8x3 might be good for the engine but you'll have to find a plane where a pitch of only 3" will be useful too.