Hi Guys,

I have a alpha 40 rtf, after the first few flight i notice the engine will lag when at about half throttle. it doesent do it at the first of the flight, just about when the plane gets to half tank. the engine doesnt actually quit just sounds like its going to, i dont give it a chance i just bring it in.
was wondering if its ust a tuning issue. no changes have been made to the settings from stock. any ideas would be much appreciated.

Thanks<br type="_moz" />