What happened
The aircraft exhibited unstable behavior during the initial phase of flight. Observers noted that the plane porpoised several times while accelerating down the runway. Eventually, the aircraft lifted off the ground, but the landing gear retracted almost immediately upon becoming airborne.
Following the initial rotation, the nose pitched downward sharply, causing the propeller to strike the surface of the runway. Despite this impact, the pilot continued the takeoff attempt. The aircraft managed to climb to an altitude of approximately 100 feet while executing a shallow left turn. However, control was not maintained; the nose pitched down again, leading to a direct impact with the ground.
The investigation
The available factual narrative focuses on the visual observation of the flight dynamics during the takeoff roll and initial climb. No mechanical examination details are provided in this specific excerpt regarding the cause of the porpoising or the immediate gear retraction.