Departure and Fueling
Prior to departing, a noncertificated pilot filled the airplane's gas tanks with approximately 20 gallons of automotive fuel sourced from unfiltered gasoline cans. The pilot then failed to perform an adequate preflight inspection.
Engine Failure
Shortly after executing a downwind departure, when the airplane was abeam the tower, the engine ceased operation.
Landing
The pilot elected to land in an open field north of the airport. During the landing roll, the airplane collided with a ditch and nosed over onto its back.
Investigation Findings
The investigation disclosed that the right fuel tank contained about one half cup of water. The fuel selector was positioned to the right fuel tank.