Accidente de ASK 23 durante el despegue en el aeródromo de Schänis resulta en daños severos
El 23 de agosto de 1987, un Alexander Schleicher ASK 23 sufrió un accidente durante el despegue en el aeródromo de Schänis en Suiza. El piloto, en un vuelo de familiarización, tuvo dificultades para mantener el control durante el remolque aéreo. El planeador rebotó varias veces en la pista, lo que resultó en la ruptura del fuselaje. A pesar de los daños severos en la aeronave, no hubo víctimas fatales ni heridas graves. El informe oficial identificó la pérdida de control durante el despegue como la causa del accidente.
- Aerotow takeoff roll: During an aerotow departure on runway 34 at Schänis, the ASK 23B remained on the ground until about halfway down the runway despite accelerating normally.
- Abrupt rotation: Around mid-runway, the student pilot pulled the control stick more briskly, causing the glider to lift off abruptly and climb above the normal tow position behind the Robin DR 400.
- Overcorrection nose-down: To correct the excessive pitch-up and overstepping of the tug, the pilot pushed the stick forward, driving the glider into a hard impact with the runway and a subsequent bounce.
- Uncontrolled pitch oscillation: The pilot then repeatedly applied late and excessive pitch corrections, leading to two further, progressively harder bounces with the glider alternately overstepping the towplane and striking the runway.
- Fuselage breaks in bounce: On the third very hard impact, the fuselage tube broke in two, leaving the glider largely uncontrollable as it climbed again to about 5–10 meters and rolled off to the right.
- Crash - no injury: The glider struck the ground to the right of the runway on its right wingtip and nose and came to rest inverted, destroying the aircraft but without causing fatal or serious injury to the pilot.