Event Overview
A glider being operated by a flight instructor and a student pilot was landing on a grass runway. As the glider neared the ground, it began to float past the intended touchdown point. The flight instructor suggested corrective actions to the student pilot but received no response.
Landing and Loss of Control
The flight instructor took control of the glider and immediately set it onto the runway. Full spoilers and wheel brake were applied, and the nose of the glider was pushed forward. The wheel brake then became locked, and the glider began to slide on the wet grass.
Collision
At the end of the runway, the flight instructor attempted to perform a 'ground loop' to avoid impacting a parked glider. During this maneuver, the right wing of the glider struck a railroad tie.
Instructor Statement
The flight instructor stated that he did not react in time to regain control of the glider after the student landed long.