What happened
On August 6, 2008, at approximately 15:30, a Fly Synthesis Storch 582 ultralight aircraft, identified as 68ADW, was participating in the "Tour de France ULM" air race. The flight originated from the Doucier microlight platform with a destination of Châtillon-sur-Seine. As part of the event itinerary, the pilot landed at Belfort aerodrome to refuel before departing from runway 36, an unpaved strip, to complete the navigation leg.
Witnesses at the airfield observed that the aircraft's takeoff roll was unusually long, noting that the airspeed and rate of climb appeared insufficient. During the initial climb, the aircraft maintained a high angle of attack. At an altitude of approximately 50 meters, the aircraft entered a stall and struck the ground roughly 800 meters from the end of the runway. The impact resulted in two fatalities (the pilot and one passenger) and the total destruction of the aircraft.
The investigation
The investigation focused on the mechanical condition of the aircraft and the environmental factors present during the accident. Examination of the wreckage revealed that all damage was consistent with the ground impact. The engine was found to be delivering appropriate power, and no mechanical anomalies were identified that could have contributed to the loss of control. Although the aircraft was equipped with a ballistic parachute, the system was not deployed.
Investigators also reviewed the weight and balance of the aircraft, confirming that the loading was within the manufacturer's specified limits. Additionally, the investigation considered the impact of the surrounding terrain and meteorological conditions, noting that other pilots operating near the time of the accident experienced light turbulence during their climbs.