THE HIGH PERFORMANCE SINGLE ENGINE AIRPLANE WAS ON A LOCAL SIGHTSEEING FLIGHT WHEN THE ENGINE LOST POWER. THE PILOT CHOSE AN UNPLOWED, DIRT, FARM FIELD IN WHICH TO LAND. DURING THE LANDING APPROACH THE AIRPLANE STRUCK ELECTRICAL POWER TRANSMISSION LINES. WITNESSES STATED THAT THE AIRPLANE CARTWHEELED END OVER END AND FELL INTO THE FIELD. THE ON SCENE INVESTIGATION REVEALED AN EMPTY RIGHT WING FUEL TANK AND THE LEFT WING FUEL TANK WAS ABOUT 3/4 FULL. THE FUEL TANK SELECTOR VALVE WAS FOUND POSITIONED ON THE RIGHT WING TANK.