Made the maiden flight on my new GP Super Stearman today and experienced some unexpected aileron flutter. Powewred by Zenoah G26, Zinger 16x8 prop.
After setting the trims and getting the first flight jitters calmed down, I decided to try some simple manuvers. Gained some altitude to try a big loop. A shallow dive followed by a quick pull-up. Throttle was at about 1/2 power. I was more concerned with keeping the wings level through the loop than throttle setting. Applied full power to get the Stearman over the top and on the backside was greeted with very violent flutter. At first, I thought the top wing was coming off! I quickly throttled back and levelled off. The Stearman returned to normal smooth flight. I promptly lined up for final approach and made a beautiful "float it in" landing.
Inspected linkages and hinges. Could find no slop or any other problems. Could just overspeeding on the down-side of a loop cause such violent flutter?
Anyone else experience this? I'm thinking I may need stronger servos on the ailerons. I'm running servos on the lower only with the rods connected to the upper ailerons. Great flying plane!

John