Helicopter engine control with rotor speed decay anticipator
US4466526A · kind A · utility
24Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Apr 16, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2270/022
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The speed (54, 56) of the free turbine (40) of a helicopter engine (20) is compared (103) with the speed (105, 106) of the helicopter rotor (10) to indicate (101, 102) autorotation, and the deceleration (108) of the rotor above a threshold magnitude (110) is utilized (81, 68, 69) to increase fuel flow (72) to the engine in anticipation of rotor speed droop which would otherwise occur during recovery from the autorotation maneuver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.