LS 4-a steep dive from low-altitude circling; impact in meadow

The pilot of an LS 4-a was killed in a meadow south of Nieder-Werbe (Germany) and the aircraft was destroyed. The glider had launched on a winch tow from Iserlohn-Sümmern (EDKI) for a cross-country flight. After about two hours, witnesses saw it transition abruptly from low-altitude circling into a very steep nose-down flight path. Impact marks showed a high pitch angle and high speed at ground contact, with wreckage scattered across a 40 m debris field. Onboard avionics were too damaged to recover flight data and no medical cause was established; the cause of the sudden departure from controlled flight could not be determined.

1. Winch launch + XC, then low circling: The LS 4-a launched on a winch tow from Iserlohn-Sümmern (EDKI) for a cross-country flight; witnesses later saw the glider at low altitude near Nieder-Werbe, circling.
2. Abrupt circling-to-dive transition: While in low-altitude circling flight near Nieder-Werbe, the glider transitions abruptly into a very steep nose-down flight path.
3. Steep high-speed descent, no recovery: The glider continues in the very steep, high-speed descent; no recovery is observed before ground contact.
4. High-speed impact in meadow: The glider struck a meadow south of Nieder-Werbe at high speed and a steep nose-down angle; the aircraft was destroyed and the pilot fatally injured.
5. Avionics unreadable; no medical cause: The recovered avionics were too damaged for flight-data readout, and the autopsy found no underlying medical cause or third-party involvement.