Colisión de un Ka 8 B con un árbol durante un aterrizaje en campo cerca de Langnau am Albis
El 25 de abril de 1970, un Ka 8 B estuvo involucrado en un incidente cerca de Langnau am Albis, Suiza. Durante un vuelo de entrenamiento, el piloto encontró corrientes descendentes en el lado de sotavento de la Albiskette y se vio obligado a realizar un aterrizaje en campo. Al intentar aterrizar en un prado en la ladera, el ala izquierda del planeador chocó contra un árbol y la aeronave se detuvo en una cerca de alambre. El piloto resultó ileso, pero el planeador sufrió daños significativos. El informe oficial atribuye el accidente a tácticas de vuelo inapropiadas.
- Aerotow cross-country: During a training flight after aerotow from Hausen am Albis, the pilot was soaring along the Albiskette and Sihltal following other gliders.
- Lee-side soaring: The pilot operated on the lee side of the Albiskette with insufficient altitude margin relative to the terrain and wind conditions.
- Encountered downdrafts: On the return along the Sihltal, the glider entered sinking air on the lee side and the pilot could no longer regain the windward side of the ridge.
- Outlanding decision: Over the Langenberg near Langnau am Albis, the pilot decided to abandon the flight and land in an uphill meadow at the western edge of the village.
- Shallow final approach: Because of limited remaining height, the pilot flew a flat final approach with airbrakes retracted instead of a steeper approach better suited to the gusty wind.
- Wind shift and sink: Shortly before reaching the chosen field, a wind shift caused the glider to lose height unexpectedly during the low final approach.
- Outlanding - damage: The left wingtip struck a tree about 3.5 m above ground, the glider then hit a wire fence and rotated before stopping in the field with serious structural damage but no pilot injury.