20220622010899A

Pilot was intending to release from the tow plane at 4500 MSL, but clouds and haze were obscuring the horizon making it difficult for new student to see reference points to fly by so glider released at 3100 MSL east of the Gliderport. Pilot had demonstrated 2 or 3 yaw string coordination indications and a turn left and right when pilot observed that they had descended to pattern entry altitude rather quickly. Entering the traffic pattern at approximately 2300 MSL showing a greater than average descent rate, much more than seen on the previous flight. Pilot slowed to minimum sink airspeed as aircraft proceeded on the downwind, completed the prelanding checklist and evaluated progress. Pilot stated that there was a farm field ahead that was suitable for an alternate landing site in the event of too much altitude was lost and couldn't complete our traffic pattern. Aircraft approached the turn to the base leg, between 200 and 250 ft AGL but descending. Pilot was anticipating a significant tailwind push from the east wind on base like he had observed on the previous flight so he rolled the glider into an approximate 15 degree left bank and added pitch down to make the turn. As the pilot entered the base leg, he applied right rudder to the glider to stop the bank but the turn continued, he added full right rudder and a little right aileron but the turn continued and the aircraft was descending. The bank angle did not appear to steepen as the aicraft descended. When the glider impacted the ground pilot felt it was in a nose low left wing down attitude, pilot believed he had turned at least 180 degrees. Pilot felt no buffet as the glider made its initial turn to base leg and stated there was no diminishing wind noise that is often heard when a glider approaches a stall.