Flight Background
According to the pilot, the airplane's engine was difficult to start due to cold weather. Once started, it ran rough, making popping sounds similar to backfiring. The pilot shut the engine down after running it for ten minutes.
Preflight and Takeoff
Upon completing the preflight inspection, the pilot restarted the engine, stating it ran smoothly. However, midway through the takeoff roll, the engine began to make soft popping sounds.
Power Loss and Descent
The pilot stated that the airplane stopped climbing when it reached about 200 feet above the ground after takeoff. The pilot then began a turn to a downwind leg during a descent. Shortly after establishing the airplane on a downwind leg, the pilot noticed it was descending toward a bridge. He turned the airplane to avoid hitting the bridge and glided onto the ground.
Investigation
The cause of the pilot reported power loss was not determined during the on-scene investigation and engine runup. The pilot had aborted a takeoff on the flight prior to the accident flight due to a rough running engine.