What happened
Immediately following takeoff from runway 24, the Piper PA-24 veered to the left of the runway. During this departure from the paved surface, the pilot encountered a wind tetrahedron positioned in the aircraft's path. In an attempt to avoid the obstacle, the pilot tried to fly over the structure; however, the belly of the aircraft struck the tetrahedron.
Following the impact, the pilot reduced engine power and successfully completed a landing in the grass infield area of the airport. The pilot was not injured during the event.
Findings
The pilot reported that the loss of directional control during the takeoff roll was caused by a phenomenon known as "wheelbarrowing." According to the pilot, the PA-24 is susceptible to these effects. The pilot also noted that the incident was the result of pilot error rather than any mechanical or maintenance issues.