RE: Enough engine for 17lb P-47?
I built the Ziroli 70" span P-47 and it flew just fine with a OS 1.60 at 17 pounds. You're airplane has a bit more area due to the longer span and should fly even better. Post some pics, maybe somebody here can identify it. I know Brian Taylor has a 76" span P-47 plan, could be that one.
Chad Veich