ASH 31 Mi hits trees outlanding after a drained battery keeps the engine stowed

The pilot was seriously injured and the ASH 31 Mi substantially damaged when it struck trees on an outlanding near Winter Haven. He self-launched and climbed to about 760 m MSL, but forgot to switch off the engine's second fuel pump on the way up, which could drain the battery. He shut the engine down and stowed the propeller pylon; a few minutes later he found no thermals and not enough height to reach the airport. He tried to restart, but the pylon would not fully extend from the fuselage. He set up for a nearby football field; the glider struck trees on the approach and came to rest inverted on a road.

1. Self-launch to 760 m MSL: The pilot self-launched for a local flight and climbed to about 760 m MSL.
2. Second fuel pump left running: He forgot to switch off the engine's second fuel pump during the climb, which could drain the battery.
3. Engine stowed, no thermals found: He shut the engine down and stowed the propeller pylon, then found no thermals and not enough height to reach the airport.
4. Pylon will not extend: He attempted a restart, but the propeller pylon would not fully extend from the fuselage.
5. Commits to a football field: With the engine unavailable, the pilot elected to land on a nearby football field.
6. Strikes trees on the approach: The glider struck trees on the approach and came to rest inverted on a road; the pilot was seriously injured, the wings and fuselage substantially damaged.