RE: balsa usa phaeton 90
When you built yours, did the plans have you sheet the aft end of the fuse all the way back to the tail? I bought mine 80% built at a swapmeet and the fuse was totally sheeted. I bought the plans from busa and noticed it doesnt look like they call for full sheeting. At 14lbs mine lumbers along but is still very menuverable with 4 ailerons. My next one will definately be open frame on the aft end of the fuse.
Engine setup is 0-0 on mine.
Edwin