On completion of a lengthy pre-flight inspection of the aircraft and engine warm up, the pilot taxied the aircraft for DEPARTURE from runway 18. The take off roll was commenced following the application of full power, with the aircraft held on the brakes. After rolling approximately 150 metres the aircraft veered to the left and developed a skid before straightening as it left the runway. Shortly after leaving the runway the aircraft pitched nose up and became airborne for a short distance before impacting the ground. No defect was found which could have contributed to the pilots inability to maintain directional control of the aircraft during the take off roll. The reason for the loss of directional control during the take off roll could not be determined. It is considered that the failure of the pilot to abandon the take off prior to the aircraft leaving the runway contributed to this accident.
