Discus B strikes a mountain slope after losing control at low height

Obergesteln, Valais, Switzerland Schempp-Hirth Discus B

A pilot was killed when a Discus B lost control low over mountain terrain near Obergesteln and struck a steep slope; the glider was destroyed. Flying solo on an alpine cross-country course in weak, patchy thermals with little height to spare, the pilot was working close to the ground when control was lost. A witness saw an almost vertical, spinning descent, but the glider's light, forward loading and the impact marks pointed to a spiral dive rather than a true spin. No technical fault was found, and the loss of control was attributed to turbulence or to dropping below minimum flying speed — with too little height to recover.

  1. Solo on an alpine XC course: On a mountain cross-country course, the pilot was cleared for a solo flight and launched by aerotow.
  2. Scratching low in weak thermals: Thermals were weak and patchy with little height to spare; the pilot was working close to the terrain.
  3. Control lost low over the slope: Low over the ground, the glider entered an uncontrolled attitude — from turbulence or dropping below minimum speed.
  4. No height to recover: So close to the terrain, there was no room to regain control before impact.
  5. Steep descent into the slope: The glider descended almost vertically and struck the steep slope; it was destroyed and the pilot killed.
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