Background
The pilot utilized an outdated sectional chart and subsequently landed at a former airport that was no longer maintained and had been closed. The airport surface was covered with grass 10 to 12 inches in height.
Departure
During the departure attempt, the pilot employed soft field takeoff procedures. The aircraft did not accelerate properly and became airborne in ground effect at minimal speed. The pilot determined that the aircraft would not clear obstacles at the end of the runway and aborted the takeoff.
Accident
The aircraft overran the airport surface and collided with a ditch. An investigation revealed that the flaps were set at full down during the departure. The engine was subsequently removed and examined; no discrepancies were found during the teardown.
Investigation
The investigation documented the following factual findings: the pilot was using an outdated sectional chart, which led to landing at a closed airport; the runway was not maintained and had tall grass; the flaps were deployed fully downward; and the engine operated without any anomalies.