Pérdida de sustentación del Mucha Standard durante la aproximación en el aeródromo de Hausen am Albis

El 28 de abril de 1968, un planeador Mucha Standard experimentó una pérdida de sustentación durante la fase de aproximación en el aeródromo de Hausen am Albis en Suiza. El piloto, que no resultó herido, se encontró inesperadamente con otro planeador durante la aproximación, lo que llevó a desplegar los frenos de aire. Esta acción resultó en la entrada en pérdida de la aeronave y su impacto en el suelo. El Mucha Standard sufrió daños significativos, pero no se reportaron lesiones. El incidente se atribuyó a la incapacidad del piloto para mantener la velocidad mínima durante el giro final.

1. Aerotow — landing: After an aerotow launch and local soaring, the pilot returned to Hausen am Albis and flew the standard landing circuit to runway 27.
2. Other glider ahead: While in the crosswind/base leg, the pilot suddenly saw another glider about 80 m directly ahead already established on final approach, which he had not previously noticed.
3. Low speed in circuit: Eyewitnesses reported the Mucha was already flying at minimal airspeed in the base leg, leaving little margin above stall, especially in turns.
4. Airbrakes and tailwind: As he turned right into final to increase spacing from the other glider, the pilot extended the airbrakes and was flying with a slight tailwind component, further increasing stall risk.
5. Stall and recovery attempt: The glider abruptly rolled off over the right wing; the pilot pushed to regain speed and then pulled due to ground proximity, partially recovering bank but not fully arresting the sink.
6. Ground and fence contact: The glider struck a ground undulation with the fuselage and then the left wing contacted an electric livestock fence, yawing the aircraft to the left.
7. Hard landing - damage: The glider came to rest roughly 90 degrees to the approach path on the airfield with the fuselage broken and wing fabric torn, while the pilot was uninjured.