Incident Overview
A pilot flying a Schleicher ASK-21 glider reported that after being towed to an altitude of 2,000 feet and released, he strayed too far from the airport traffic pattern. During the return flight, the pilot encountered a meteorological phenomenon described as a "sink and waterfall" effect, which caused a low approach. The glider subsequently collided with terrain located 100 feet short of the runway.
Pilot Statement
The pilot stated that there were no deficiencies in the performance or handling of the glider. He attributed the accident to his own decision to fly too far from the traffic pattern and the unexpected encounter with the sink and waterfall effect, which reduced his altitude and prevented him from reaching the airport.
Glider Details
The aircraft involved was a Schleicher ASK-21, a two-seat glider commonly used for training and recreational soaring. The specific registration and age of the glider were not provided in the source.
Meteorological Conditions
The pilot mentioned a "sink and waterfall" effect, which typically refers to areas of strong descending air currents often found near mountains or terrain features. However, no further details about weather conditions or time of day were available in the source.
Accident Sequence
After release from the tow plane, the pilot flew to a distance that he later considered excessive relative to the airport. Attempting to return, he encountered strong sink rates that resulted in an approach altitude too low to clear obstacles. The glider impacted the ground 100 feet short of the runway, ending the flight.
Post-Accident Observations
The source did not indicate any damage assessment, injuries, or further investigation outcomes. The pilot's account suggests no mechanical or design issues with the glider.