Accident Overview
A noncertificated pilot was practicing hovering maneuvers with an experimental amateur-built helicopter in his yard. During the hover, the helicopter's tail rotor struck a tree. The pilot reported that immediately following the strike, the helicopter developed "a huge vibration suddenly and [he] had no heading control." Subsequently, the helicopter impacted the ground and was destroyed by a post-crash fire.
Pilot Report
The pilot stated that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation. In the NTSB Pilot/Operator Aircraft Accident/Incident Report form (6120.1), the pilot noted that he should have taken more dual instruction and should have chosen a more open area for hover practice.
Investigation
The accident involved an experimental amateur-built helicopter. The pilot was not certificated. The helicopter was destroyed by fire after impact. No further details about the aircraft or pilot qualifications were provided in the source.