This is an ARF that was kitted by Pilot in the 70's and 80's. I had one powered by an early 4 stroke motor. The name escapes me at the moment. It would only run if the plane was straight and level. Pull the nose up or put it down, it would quit. I replaced it with an OS.40FSR and had a great time. Vibration on this plane is a killer as the hard plastic parts crack. On of the finest flying planes I had, the equal of the good flying "Stiks". I think it was called a Super BoxFly .40.