Students from Delft Aerospace Rocket Engineering recently presented their failure investigation paper into the anomaly that occurred during their Stratos III rocket launch last year at the International Society of Air Safety Investigators (ISASI) conference this year.
The rocket experienced an inertial roll coupling before disintegrating in flight at Mach 3 and 10km in altitude. Rather than explain it all here, click the paper below!!
(Good to see student teams carrying out a thorough analysis and sharing it, I wish more would be open and sharing)
The team broke the amateur rocket altitude record for Poland set at 12.3 km. The 7.5 kN thrust rocket motor burnt for 3.5 seconds sending to rocket 18.5 km in altitude. Although the parachute did not deploy the team was still able to retrieve full telemetry for the duration of the flight.