ASN Wikibase Occurrence # 157405
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| Date: | Thursday 16 December 1999 |
| Time: | 11:45 LT |
| Type: | Cartercopters Cartercopter |
| Owner/operator: | Cartercopters LLC |
| Registration: | N121CC |
| MSN: | 1 |
| Year of manufacture: | 1998 |
| Total airframe hrs: | 45 hours |
| Engine model: | GM LSI CORVETTE |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Olney Municipal Airport near Olney, TX -
 United States of America
|
| Phase: | Landing |
| Nature: | Unknown |
| Departure airport: | (KONY) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
For the first test flight of the day, the gyroplane's rotor was pre-rotated to 450 rpm, instead of the normal 550 rpm. As the takeoff was initiated, the collective was raised in a 'normal' manner and liftoff was accomplished. According to the pilot, 'within a few seconds into the climb, the control forces began to build, and stick shake began.' The pilot had to use both hands to apply forward cyclic pressure to 'counter' the nose pitching up. The pilot stated that he momentarily removed one hand from the cyclic to reduce power [collective]. At this time, the nose pitched up and power was reapplied to cushion the touchdown. The pilot reported that, 'application of power was not smooth and resulted in a hard landing, causing the blades to hit the rudders.' The pilot reported that after reviewing the flight data, it 'became apparent that had the collective been lowered shortly after liftoff, the rotor RPM would not have dissipated so rapidly, causing the high control forces and blade flapping.'
Probable Cause: The pilot's failure to maintain rotor rpm during takeoff, which resulted in a hard landing following the aborted takeoff.
Accident investigation:
 |
|
Sources:
NTSB FTW00LA045
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Jul-2013 08:51 | JINX | Added |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 14-Dec-2017 10:00 | ASN Update Bot | Updated [Operator, Nature, Departure airport, Destination airport, Source, Narrative, Plane category] |
| 07-Apr-2024 16:12 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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