Sail Plane
Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Commercial
Flight Crew Last 90 Days 48; Flight Crew Total 2433; Flight Crew Type 54
Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Ground Strike - Aircraft; Ground Event / Encounter Loss Of Aircraft Control
Aircraft Aircraft Damaged; Flight Crew Landed in Emergency Condition
Human Factors
During training flight; [a] Flight Review; with experienced private glider pilot; we were doing a 'no spoiler' landing on Runway 36. On final about 100 feet up; we were still high; I directed pilot to slip a little more (nose right; left bank). Glider was then coming down more aggressively. I directed pilot to get out of slip. Landing speed was about 50 knots. He then pushed hard on the left rudder; which swung the nose from 20 degrees to the right to 20 degrees to the left in about 2 seconds.Momentum of rotation continued counter clockwise despite right rudder application. We were about 5 feet above grass field adjacent to grass runway. Left wing was down about 20 degrees and hit grass first followed by the glider which landed sideways in a level attitude going west from about 3 feet above ground. Glider came to a stop in about 20 feet pointing south. The sudden stop; going sideways; tore the landing skid from the aircraft. The landing wheel was intact and could be used to tow the glider back to the beginning of the field.
Instructor reported the student over corrected in the landing maneuver resulting in wing/ground contact.