What happened
During a landing attempt on a grass runway, a student pilot experienced a long landing that caused the glider to float past the intended touchdown point. The flight instructor, who was on board, attempted to communicate corrective actions to the student pilot but received no response.
To prevent further deviation, the flight instructor took control of the aircraft and applied full spoilers and wheel brakes while pushing the nose forward. However, the wheel brakes locked, causing the glider to slide across the wet grass. In an effort to avoid colliding with a parked glider at the end of the runway, the instructor attempted to execute a ground loop. During this maneuver, the right wing of the glider struck a railroad tie.
There were no injuries reported in the accident.