Incident avec un Grunau Baby II lors d'un lancement au treuil à l'aérodrome de Sisseln
Le 16 mai 1965, un Grunau Baby II a connu un incident lors d'un lancement au treuil à l'aérodrome de Sisseln en Suisse. L'élève-pilote a perdu le contrôle du planeur pendant le lancement, et le câble du treuil a été libéré seulement après le décollage du planeur. Le planeur a ensuite plongé abruptement vers le sol. L'élève-pilote est resté indemne, mais l'appareil a subi des dommages importants, estimés à 40 % de sa valeur.
- Winch launch ground roll: During the initial ground roll of a winch launch, the student pilot began accelerating in the Grunau Baby II.
- Loss of control on roll: While still on the ground during the winch launch, the student pilot lost control of the glider's attitude and direction.
- Late cable release: The winch cable was not released immediately after control was lost and was only released after the glider had already lifted off.
- Steep descent after lift-off: After lifting off with control already lost and the cable then released, the glider entered a relatively steep descent toward the ground.
- Crash - no injury: The glider impacted the ground steeply, leaving the student pilot uninjured but causing substantial damage to the aircraft (about 40% of its value).