What happened
During the initial phase of takeoff, the aircraft's tailwheel encountered a concealed boulder on the runway surface. This sudden impact momentarily disrupted the pilot's ability to maintain directional control. Rather than aborting the maneuver, the pilot elected to continue the takeoff roll.
As the aircraft lifted off or remained in ground effect during recovery, the right wing tip struck the ground. The force of this contact resulted in partial separation of the right aileron. Despite the structural damage, the pilot maintained control and continued the flight to the nearest airport equipped with appropriate emergency services.
The investigation
The physical evidence indicated that the initial loss of directional control was caused by the tailwheel impacting an obstruction on the runway. Subsequent inspection revealed damage to the right wingtip and the aileron assembly. No other mechanical failures were reported prior to the incident.
Findings
Contributing factors included the presence of a hidden boulder on the takeoff surface and the decision to continue the flight after sustaining structural damage. The pilot's ability to reach an airport with emergency capabilities prevented further injury or loss of the aircraft.