that sure would explain for a lot.

Horizon hobby sold that plane with that engine as a combo.

on the 1st flight, the tach on engine read 6500 rpm swinging a 23 x 8 prop right before flight. that plane rocketed out and the aileron servos were stripped.

on my second flight,

i had made the engine rich, since it is still breaking in, which i had not done for 1st flight.

i got 5500 rpm on tach right before flight,
so that would explain why it flew better. top speed was 90 mph on 2nd flight.

i did not use the forerunner on the 1st flight, so don't know what speed it was going.

HH has discontinued the plane, either them or H9.