Hey racers,
A friend of mine has an old viper Q500. It has full length ailerons, T tail and the engine mounts upright , yet the crank is no where near the thrust line center of the fuse. My question is whats the CG?
I started at 3.38". I have since remover 1 1/4 oz from the tail ( a little at a time). It flew like crap at first, flew like crap when I took off 1/2 oz and still flies like crap with the rest off.
When he got it, it had almost 2 ozs at the tail. My maiden was a total handfull and definately tail heavey, hence a removal process of that dead weight. I have 4 flights on it, and it still porpuses, so Im still taking throw rates down, but its next to nothing no (maybe 1/8" at most)
The ailerons act like there is slop (cant trim) but the hinges and controls are tight?
Any ideas here?

For what its worth, Ive flown lots of quickys and other race type planes. Never have I had one this bad.