Flight Attempt
The pilot was attempting to take off and return to Fairbanks, Alaska. During the pre-departure phase, the pilot taxied uphill for a distance of 1,500 feet. Carburetor heat was used during the taxi. After reaching the intended departure point, the pilot turned the airplane around to line up for takeoff. At that time, the pilot observed fine snow and ice crystals suspended in the air over the intended takeoff area.
Engine Issues
The pilot then turned the carburetor heat off, applied full power, and commenced the takeoff. When the airplane reached approximately 15 feet above ground level, the engine lost power. The pilot subsequently applied carburetor heat, and some power was restored. The pilot noted that he had to lower the nose to maintain airspeed.
Accident
The airplane crashed into trees. The pilot stated that he thought the intake screen had become iced over during the taxi and takeoff.