GP 1/3 Pitts
Harris,
I can assure you not only are our models test flown, they are test flown heavily, repeatedly, and with a large range of power plants.
Please advise what engine are you running in the aircraft?
This is the ONLY engine size we recommend based upon that testing:
Engine: 1.6-2.7 (26-45cc) 2-stroke
OR 2.5 cu in (41cc) gasoline/oil mix
OR FT300 (OSMG1250) 4-stroke