The aircraft had been parked for 14 months and did not have a current annual inspection when the owner/pilot took it for a flight. No known witnesses saw the aircraft takeoff. Subsequently, the aircraft impacted in a field just north of the airport. It was found when a motorist saw a dust cloud in the field and proceeded to investigate. An exam of the crash site revealed the aircraft had impacted just northeast of where it had come to rest. The aircraft was extensively damaged during impact. Both prop blades were bent aft and neither had chordwise polishing or scratches. No usable fuel was found in the aircraft. Although the fuel pump filter was wet and the lines were broken between the gascolator and carburetor, no fuel was found in the lines or electric fuel pump. The accident occurred on a day when the airport was unattended and fuel was not available. A toxicology check showed no alcohol in the pilot's blood. Although his kidney tissue had an alcohol level of 0.056%, the toxicology report indicated the alcohol was '. . . due to tissue decomposition or contamination.'