Incident Overview
A glider pilot reported that while maneuvering in the traffic pattern, turning from the base leg to final approach, the aircraft encountered a sudden wind gust. According to the pilot's account, the gust '...blew my right wing up and over into a spin.' The pilot managed to recover from the spin approximately 20 feet above the tree tops. However, he did not have enough altitude to continue to the airport, and the glider subsequently struck trees.
Pilot Report
In his report, the pilot stated that the accident could have been prevented if he had 'carried more speed.' The wind gust was encountered during the transition from base to final, a critical phase of the traffic pattern. The pilot's recovery was successful in terms of arresting the spin, but the available altitude was insufficient for a safe landing at the airport.
Sequence of Events
The sequence began when the glider was on the base leg of the traffic pattern. As the pilot turned onto final approach, a wind gust induced a spin by lifting the right wing. The pilot executed a recovery procedure, which became effective when the glider was only 20 feet above the tree tops. With the airfield still beyond reach, the glider impacted trees.
Conclusion
The pilot's assessment indicates that a higher approach speed might have provided a greater margin of safety, potentially preventing the loss of control or enabling a different outcome. The incident highlights the challenges of managing unexpected wind conditions during critical phases of flight.