The airline transport certificated pilot with 10 skydiving passengers began a takeoff in a tailwheel-equipped and turboprop powered airplane on a CFR Part 91 skydiving flight. As the airplane started its climb, the pitch angle of the nose of the airplane increased until the airplane appeared to stall about 50 to 100 feet agl. It descended and impacted the runway in a left wing, nose low attitude.
The pilot stated that after the 14 jumpers left the airplane at 13,500 feet, southwest of the airport, he started his descent to the northeast. He approached the airport from the northeast overflew the airport, and made a left turn to enter the downwind leg for runway 23. He saw some parachutes on the ground and some in the air.