The aircraft crashed after takeoff from a 2,930 ft runway with four occupants on board. The aircraft weight was not known, but was estimated to be 2,334 lbs during takeoff. There was a light wind from the west and the temperature was 42 degrees Fahrenheit. Witnesses who observed the takeoff roll stated that the engine sounded normal, but the aircraft did not become airborne until 2,200 to 2,700 ft down the runway. Reportedly, the aircraft climbed no higher than 100 to 150 ft AGL, then disappeared from their view about a mile from the runway. A pilot that was landing in another plane observed the aircraft turn left about 80 degrees during a low and slow departure. The aircraft struck trees about 1.5 miles from the end of the runway and left of its centerline. An examination of the wreckage revealed no preimpact malfunction or failure. Relatives and acquaintances of the pilot could not recall the pilot previously operating the aircraft with four adults on board.