Incident Overview
The crew was engaged in a local test flight out of Norman Airport, performing various tests including stalls under specific conditions. During the flight, the pilot-in-command initiated a stall, after which control was lost. The aircraft entered a dive and subsequently crashed into a wooded area near Rosedale, approximately 28 miles southeast of Norman Airfield.
Aircraft and Occupants
The aircraft was destroyed in the impact. All three occupants were killed.
Official Findings
According to the accident investigation, the probable cause was that the pilot-in-command failed to obtain or maintain flying speed, resulting in an aerodynamic stall. The investigation also noted that the pilot's lack of familiarity with the aircraft was a contributing factor.