According to a statement obtained from the pilot by a Federal Aviation Administration inspector, the pilot was attempting to depart a private grass strip with a tailwind. Approximately half way down the runway the gyroplane became airborne. The pilot looked down to check his engine instruments, and when he looked back up he was quickly approaching the end of the runway and a fence line. The pilot was unable to maneuver over the fence and the gyroplane impacted the top of the fence line. The gyroplane's fueslage was substantially damaged. He did not report any preimpact anomalies, and attributed inattention for his descent and collision with the fence. The pilot added that he was aware of the tailwind conditions.