Ka 6 Kollision mit Baum bei Außenlandung in der Nähe von Wellhausen, Schweiz

Am 7. Juni 1970 kollidierte eine Ka 6 CR bei einem Außenlandungsversuch in der Nähe von Wellhausen, Schweiz, mit einem Baum. Der Pilot, der an einem regionalen Segelflugwettbewerb teilnahm, musste aufgrund unzureichender Höhe außerhalb landen. Beim Versuch, auf einem geeigneten Feld zu landen, schätzte der Pilot den Anflug falsch ein und kollidierte mit einem Baum, was dazu führte, dass das Segelflugzeug aus geringer Höhe abstürzte. Der Pilot erlitt schwere Verletzungen und das Flugzeug wurde stark beschädigt. Der offizielle Bericht kam zu dem Schluss, dass die späte Entscheidung des Piloten zur Landung zu dem Vorfall beitrug.

1. Cross-country thermaling: During a competition cross-country flight after aerotow from Schaffhausen, the pilot progressed around the task while struggling with weak and intermittent thermals.
2. Insufficient lift en route: On the leg after Amlikon, the pilot was unable to find further usable lift, lost height, and was forced to plan an outlanding near Wellhausen.
3. Late outlanding decision: The pilot delayed the decision to outland until about 300 m above ground over unfamiliar terrain, leaving little height for proper field reconnaissance and circuit planning.
4. Altitude misjudgment: Using QFE set to the higher-elevation departure airfield, the pilot likely misjudged his true height above the lower outlanding field and believed he had more height available than he did.
5. Long, high final approach: He selected a mown field near the road overpass, flew a left-hand circuit, and only after the final 90° turn realized his approach was too long and high, then used full airbrakes and a sideslip to lose height.
6. Last-moment field change: When he saw he would overfly his intended touchdown point, he retracted the airbrakes, pulled up using excess speed, and turned about 90° left to divert to another nearby field, attempting to pass between light poles and over a small tree.
7. Crash - serious injury: During the low-altitude diversion turn the glider struck the tree and crashed from a low height, seriously injuring the pilot and heavily damaging the aircraft.