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 the Jantar 2B started an aerotow behind a PZL 104 Wilga 35A during a glider competition at Klix, with gusty crosswind around 12 kt and about 100 competitors waiting on the field.
2. Two prior aborts; third before field: The pilot aborted two earlier starts during the ground roll; the third start was carried out about 40 m in front of the crowd of waiting competitors, adding pressure before the flight.
3. Aft CG, missing trim weights, overload: The trim-weight mount was empty; without its 4 kg the CG fell outside the allowed range, just ~5 mm forward of the aft limit, raising spin tendency. Cockpit load was ~13 kg over limit.
4. Tow speed ~120 km/h, above recommended: The tug's airspeed indicator read 130 km/h but over-read by 5 km/h; GPS data showed an actual tow speed of about 120 km/h, above the 105-115 km/h recommended for this glider.
5. Oscillation; rope releases in climb: During the initial climb the Jantar 2B began oscillating behind the tug, possibly from low airspeed or diverted attention. The tow rope then separated, automatically or by release.
6. No nose-down; stall and spin in turn: After release the nose stayed above the horizon with no airspeed gain. The glider turned left with steepening bank, stalled, and spun with too little altitude to recover.
7. Half-spin impact in grain field at ~40 m: After about half a turn of spin the Jantar 2B struck a grain field east of the airfield at about 60° nose-down, wing and cockpit hitting almost simultaneously. The pilot died.