The pilot reported that following an uneventful taxi and takeoff from Runway 18, the engine stopped at a height of approximately 1,000 feet agl. The pilot lowered the nose and trimmed for best glide but realised he would not be able to return to the runway and chose to land in an adjacent field. Having successfully cleared a high voltage powerline, he sideslipped the aircraft but the landing was heavy, resulting in significant damage. The pilot was uninjured and exited through the door, which had opened when the aircraft struck the ground. He reported that the engine had been ground run after the accident with no anomalies and the reason the engine had stopped was not determined.