RE: GP Dr1
Yeah. Some tips. Use a .91 sized four stroke. Take out about half the right thrust out, and a little more down thrust. Center the engine half way between the position shown in the instructions and the center. Adjust the wheel wing to level with the wing or maybe 3 degrees down. And most important don't use the CA hinges on the rudder! Flys great, take off is easy, landings a bit tricky with a crosswind. Elevator is sensitive at speed. Makes surprisingly small turns and loops.