Helicopter with stabilator detuned in antisymmetric vibration modes from main rotor wake excitation frequency
US4247061A · kind A · utility
15Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1978 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Jul 12, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C2027/8281
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A helicopter stabilator having naturally high response to the main rotor wake excitation frequency in roll and yaw stabilator vibratory modes is selectively mounted so as to be detuned therefrom in antisymmetric stabilator vibratory modes without adversely affecting symmetric stabilator vibratory modes, stabilator vertical stiffness, or stabilator pitch stiffness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.