Direct naar de inhoud
  • Home
  • Investigations
  • Loss of control after interrupted winch launch, Alexander Schleicher ASW 28, PH-1643, Terlet glider airfield
Bron: Onderzoeksraad voor Veiligheid
Bron: Onderzoeksraad voor Veiligheid

Loss of control after interrupted winch launch, Alexander Schleicher ASW 28, PH-1643, Terlet glider airfield

Status : Closed

After the glider came clear of the ground, the pilot gradually increased the aircraft’s pitch attitude. Shortly afterwards, he noted that the winch was no longer applying any pulling force, and that the speed of the glider was decreasing. In response, he lowered the pitch attitude of the aircraft. This is a signal to the winch operator that the winch speed is too low, and that more power should be applied. However, according to the pilot, nothing happened. The pilot then lowered the nose of the glider to horizontal, at which point he observed that the winch cable was hanging loosely. At that point he realized that something had gone wrong, and he disconnected the cable. At that moment, the glider was flying at an altitude of between 25 and 30 metres. According to the pilot, the air speed of the glider had fallen to around 35 km/hour, while according to him the aircraft should normally have been travelling at 95 km/hour. He lowered the pitch attitude of the glider but due to the low altitude at which the glider was flying, he was cautious about dipping the nose too far. He subsequently attempted to lower the pitch attitude in stages. The speed increased slightly, but at a certain point the glider slipped away towards its left wing, the nose adopted a downward pitch, and initiated a turn. The glider then hit the ground first with its left wing and then the nose. The pilot was injured during the accident, and the glider suffered serious damage.

The available film footage reveals that the pilot had lowered the nose of the glider from ascending attitude to a more downward attitude, but not to a sufficient extent, as a result of which the airspeed did not increase sufficiently, and fell below the stall speed. Almost immediately thereafter, the glider slipped across one wing. Given the low altitude, by that time the pilot was no longer able to recover the situation and the accident proved unavoidable.

More information can be found in our Quarterly Aviation Report Q3 2022.

This site is registered on wpml.org as a development site. Switch to a production site key to remove this banner.