Flight and Weather Conditions
A pilot reported obtaining a weather briefing before the initial flight. En route, the pilot landed to check the weather again. After the second takeoff, weather information was obtained in flight from the ATIS at Knoxville, Tennessee. The ATIS reported 900 feet overcast, 8 miles visibility, and severe icing in the local area.
Incident Sequence
Earlier in the flight, the pilot had used carburetor heat due to the weather conditions. With the carburetor heat applied, the aircraft entered a snow shower and a loss of RPM ensued. Additionally, airframe icing was encountered.
Landing and Outcome
The pilot elected to divert to a nearby airport; however, the RPM could not be maintained and a precautionary landing was made in a field. During the landing, the aircraft encountered soft terrain and nosed over.