A truly GREAT flying airplane. I have a OS 1.60 in mine. I increased the tank to a 24 oz. Dubro turned on its side for a little more flying time. The 24 oz. Dubro will fit perfectly in the place of the oval one supplied if you decide you need it. I recently broke the fuse into on mine in a stall from about 4 feet off the ground. I was doing several touch and go and played a little too long. Just as I took back off the motor was drinking the last drop and the 1.60 died. I managed to get it turned but the air speed just wasn?t enough. It completely and cleanly broke the fuse at the wing dowel former and at the instrument panel location. The impact was not that hard?. But hey these things are built to fly light not withstand so hard knocks. It took about two evenings to repair and recover, but the nice decals on the sides are now missing. I really love this plane and now that it has been resurrected I may try those touchy maneuvers a little closer to earth. Enjoy Johnny