I've been having a lot of fun slamming my Tiger II around the sky since I built it a few months ago, and a few times on full-throttle somewhat downhill runs I have heard what sounded like an engine/prop warble. Well today, on yet another windy flying day, it happened again and I could visibly see the ailerons vibrating in the setting sun. Off the throttle, and I landed right away.

There is some play on the torque rods of course, but the Futaba 3001 servo is solid. Glue joints and hinges are fine, and the wing is built to the stock plan with good epoxy bonds on the aileron support tubes/associated parts. Looking at the linkages, the torque rods seem a bit long in my opinion, and I am wondering what else could be contributing to my problem. Would appreciate any suggestions folks would have to resolve the flutter, as it WILL cause failure ultimately if I don't fix it.

I am using an OS .35 AX on it so it is not over-powered. Have had a lot of models but this is my first experience with flutter besides witnessing a fellow flyer's P-38 with aileron flutter just before I was dodging pieces of it rolling by me! Don't want that to happen to my sweet Tiger II.