RE: Balsa USA Citabria Pro
Hey guys I forgot to mention the thrust angle issue with the C-Pro. Mine was built by someone else and I picked it up at one of the local club auctions. The plane had been through a few hands, I turned out to be the fith owner, and was never finished or flown. Needless to say I didn't have any say in the building of the plane so all I did was recover it and stuff in the gear and engine.
The initial flight was pretty exciting since the plane wanted to climb lkie crazy and turns were all goofy needing a LOT of rudder. I was puzzled and took the plane home and put my Robart incidence meter on it and lo and behold....
The plane has 3 degrees of UP thrust with the horizontal stab set propped up to get zero! I had shimmed in 2 degrees of right thrust when I mounted the engine. A quick check of the firewall with a carpenters square showed that it was perpendicular to the fuse sides and top. The plans show that the firewall is basically square to the front of the plane so I thought I was ok. Apparently the horizontal stab was off on mine but like I said I didn't build the plane.
Before flying thse planes do yourselves a favor and at least prop up the tail and check the engine for up or down thrust. Trust me on this, you DON'T want any up thrust with this plane!
Hope this can be of some help.