Hey folks,

I've been trimming my 50cc Extra 260 for IMAC and I'm trying to get things setup as described in Peter Goldsmith's article. While the plane is currently setup so that it flies straight and level hands off both inverted and upright, on uplines, it tends to pitch to the belly (power on) and on downlines it pulls out on its own (power off). Chopping the power from cruise does not result in a noticable dive or climb...the plane just keeps going. Other quirks include a strong pitch to the belly during knife-edge flight.

I assume that downthrust is built-in? Has anyone pulled out some of that downthrust? This could be a CG issue, but the inverted 45* upline test shows no climb or descent and the plane stays on track during the 45* power-off downline test. It's tough to get the aircraft to stall...if you creep up on the stall, you can hold about 15* up elevator and it will just float slowly down.


Other details: 16.5 lbs, DA50, 23x8 Xoar prop

Ideas?