My dad is having trouble with his 1/4 scale Patty Wagstaff Extra 300S ARF and he put a Fuji 50 cc gas engine in her and its ignition system, he used digital servoes(dont know what kind) and regulars for the rest of the plane and a Eclipse 7 for the radio. Now when we range check it, it gets about 230ft. without flutters with the engine off, and not even 50ft. with the engine started and only the rudder goes nuts, but when the engine revs up or bogs down the rudder starts to flutter, and a recent post on RCU had the same problems with his gasser and someone said that Hi-Tech isnt a good radio to go with on an gas engine, so we gutted another plane and put a JR 223 on it and it seemed to get worse with the engine started and all of the sufaces go nuts, we've tried everying bypass crap, replace recievers, change mufflers/run it with no muffler. So if anyone has any info on this problem please post it, it would be apprieciated




Edited title to garner more wisdom...