ORIGINAL: jimmyjames213
theirs your problem, that prop is wayyyy to big for that engine, try a 12x4 and that plane will slow down much better and have more power
Agreed... especially on an SF engine on that Mustang...
The PTS engines is more powerful than the SF/SX and so is an AX...
On this plane you do need the extra power...
The plane normally comes with a special 10x4.5x3 prop with the PTS engine.
The plane WILL fly slowly and well with that combo but the engine is producing a good deal of thrust below 50% settings.