THE PILOT-IN-COMMAND'S FAILURE TO ASSURE THAT AN ADEQUATE SUPPLY OF FUEL WAS ON BOARD THE AIRPLANE FOR THE INTENDED FLIGHT, AND HIS FAILURE TO MAINTAIN ADEQUATE AIRSPEED DURING THE FORCED LANDING RESULTING IN A STALL/SPIN. A FACTOR CONTRIBUTING TO THE ACCIDENT WAS THE PILOT'S LACK OF EXPERIENCE IN A CESSNA 140.