Collision du Ka 2B avec le terrain près d'Ennenda lors d'un vol de pente

Le 31 mai 1982, un planeur Alexander Schleicher Ka 2B est entré en collision avec le terrain près d'Ennenda, en Suisse, lors d'un vol de pente. Le pilote et un passager avaient décollé plus tôt ce jour-là de l'aérodrome de Mollis. En tentant de prendre de l'altitude le long de la crête de Chrisegg, le planeur a perdu de la vitesse et de l'altitude, entraînant une collision avec la pente. Le pilote a subi des blessures légères, tandis que le passager a été grièvement blessé. Le planeur a été détruit lors de l'impact.

1. Ridge soaring flight: After an aerotow departure from Mollis, the pilot conducted a several-hour soaring flight and was ridge soaring along the west slope of Chrisegg to gain height.
2. Low experience, fatigue: The pilot had relatively low total gliding experience and reported feeling somewhat tired after the long flight, which likely degraded his judgment of terrain clearance.
3. Tight turn near slope: While flying close to the steep mountainside and finding lift, the pilot initiated a right-hand circling turn with insufficient distance from the slope.
4. Sink and speed loss: On the valley side of the turn the glider encountered sink and a reduction in airspeed, eroding its energy margin near the terrain.
5. Pushed toward slope: To regain airspeed, the pilot pushed the nose down toward the mountainside while still in close proximity to the steep slope.
6. Collision with slope: With insufficient height and distance to recover, the glider struck the steep slope in an angled attitude near the upper edge of a small snow cone.
7. Crash - serious injury: The glider was destroyed on impact, the pilot was slightly injured, and the passenger sustained serious injuries.