Incident Overview
During an instructional flight, a glider was on approach with a certificated flight instructor and a student pilot. The student was practicing a no-airbrake landing, a technique that requires precise energy management. On approach, the student employed a forward slip to correct altitude. However, the instructor reported that the student's aggressive control inputs caused the aircraft to become too slow and too low to reach the intended airfield.
Instructor Intervention
Recognizing the unsafe situation, the flight instructor took over control of the glider. The instructor decided to conduct an off-field landing due to the inability to reach the airfield. During the landing attempt, the glider's right wing contacted tall grass.
Outcome and Damage
The impact with the tall grass caused the glider to ground loop to the right. The ground loop resulted in substantial damage to the rudder and empennage structures. Neither the flight instructor nor the student reported any mechanical failures or malfunctions with the glider before or during the event.
Additional Information
The glider was operated under instructional purposes. The source did not specify the glider's registration, make, model, or the precise location and date of the incident.