On February 3, 1994, at 0915 central standard time, a Cannon Starduster II, N21RC, sustained substantial damage during a forced landing due to a partial power loss. The pilot was not injured, and visual meteorological conditions prevailed. No flight plan was filed for this personal flight which was on initial climb following takeoff from Brazoria Air Park, Texas. According to the pilot, pre takeoff checks were normal and the engine began running rough at approximately 150 feet above ground level. The pilot said he could not land on the remaining runway and decided to land in an open field beside the airport. The pilot stated that the landing was "hard" and caused damage to the propeller, firewall, right wing, and landing gear. The engine was examined by an FAA inspector who found fuel tank sealant throughout the fuel feed system.