ASW 19B crash at Zigerhubel due to turbulent conditions

On August 11, 1985, an Alexander Schleicher ASW 19B crashed at Zigerhubel in Rüti b. Riggisberg, Switzerland. The glider encountered turbulent air, causing it to stall and crash from a low altitude on a wooded slope. The pilot, who was flying in a double tow for the first time, was fatally injured, and the aircraft was destroyed. The official investigation confirmed that the accident resulted from the glider falling below its minimum airspeed in turbulent conditions.