The pilot performed several taxi tests, which seemed "normal." He then attempted a takeoff on runway 17 (4,000 feet by 100 feet, concrete) during which the airplane bounced once and impacted the terrain next to the runway. The pilot stated that the airplane did not have "pitch authority" and may not have had enough airspeed for takeoff. The airplane sustained substantial damage which included bent fuselage tubing and wing struts. The pilot received serious injuries.