Jantar 2B stalls and spins after aerotow rope release

The pilot of a Jantar 2B was fatally injured when the glider stalled and spun from low altitude after an aerotow rope release at a competition launch at Klix; aircraft destroyed. After two earlier aborts the third start was taken in front of ~100 competitors. Initial climb behind the Wilga 35A was at ~120 km/h (above 105-115 recommended); the Jantar oscillated and the rope released. With no nose-down and no airspeed gain the glider entered a left turn with steepening bank, stalled and impacted a grain field at ~40 m after half a spin. CG sat near the aft limit, trim weights absent, cockpit overloaded by ~13 kg, baggage equipment unsecured.

1. Competition aerotow from Klix: At 12:09 LT the Jantar 2B was on an aerotow start behind a PZL 104 Wilga 35A tug during a glider competition at Klix. Wind 130-140° gusty, ~12 kt; the competition had ~100 participants on the field waiting their starts.
2. Two prior aborts; third before field: The pilot had aborted two earlier starts during the ground roll. The third start was carried out about 40 m in front of the participant field. The investigation noted the situation as a contributing psychological load on the pilot.
3. Aft CG, missing trim weights, overload: The trim-weight mounting on the instrument pillar was found empty at the wreck site; without the 4 kg trim weights the empty-weight CG (590.7 mm) lay outside the allowed 570-580 mm range. Flight CG sat at 373 mm — only ~5 mm forward of the aft limit (378 mm), increasing pitch instability and spin tendency. Cockpit load was exceeded by ~13 kg (pilot+parachute ~100 kg vs max 93.4 kg) and the baggage compartment held a second logger and two unsecured batteries (~6 kg).
4. Tow speed ~120 km/h, above recommended: The tug ASI read 130 km/h but was found to over-read by 5 km/h; GPS data corroborated an actual tow speed of about 120 km/h, above the flight-manual recommended 105-115 km/h for this glider with flaps +1/+2.
5. Oscillation; rope releases in climb: During the initial climb the Jantar 2B began oscillating behind the tug. The aerotow rope then separated from the glider — either by automatic release from the oscillations or by intentional release. Likely contributors to the oscillation: insufficient airspeed, incorrect flap setting, or attention diverted.
6. No nose-down; stall and spin in turn: After release no nose-down or airspeed gain was observed; the pitch attitude stayed above the horizon. The glider entered a left turn with steepening bank, stalled, and began to spin from the nose-high attitude. The available altitude was insufficient to recover.
7. Half-spin impact in grain field at ~40 m: After about half a turn of spin the Jantar 2B impacted a grain field ~240 m east of the airfield boundary at about 60° nose-down attitude, right wing and cockpit striking nearly simultaneously. The pilot was fatally injured; the airframe was destroyed.