ASN Wikibase Occurrence # 355127
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| Date: | Wednesday 15 October 1997 |
| Time: | 14:16 LT |
| Type: | Sego Tool HAWK H2X |
| Owner/operator: | Groen Brothers Aviation Inc. |
| Registration: | N4412X |
| MSN: | 201X |
| Total airframe hrs: | 40 hours |
| Engine model: | Chevrolet V-8 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Tooele, UT -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | (T62) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilot, he was taking off for one of a series of flight tests. He reported that shortly after liftoff, the gyroplane made an uncommanded roll to the right. The pilot said that he applied full left cyclic and full left rudder, but the main rotor system struck the ground. The main rotor blades separated from the gyroplane and the aircraft came to rest with the fuselage twisted. Postcrash examination of the gyroplane by the design/manufacturing team revealed that the control system design of this aircraft had an inherent lag in time between control input and aircraft response. They found the runway that the gyroplane was taking off from slopped 1.7 to 1.8 degrees to the left. They said that 'the moment the aircraft left the ground, gravity moved the fuselage to the left and the rotor disk to the right.' Subsequently, a right turn was initiated and ground contact was made by the main rotor disk before the pilot's correction inputs could take effect.
Probable Cause: The pilot's failure to maintain aircraft control. Contributing was the inadequate design of the flight control systems, resulting in slow response to pilot input.
Accident investigation:
 |
|
Sources:
NTSB FTW98LA015
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Mar-2024 08:38 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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