Rotorcraft having an airspeed sensor located at the top of a tail fin of the rotorcraft
US9415881B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2015 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | May 11, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of calculating and displaying the true airspeed of a rotorcraft. At least one omnidirectional airspeed sensor is installed at the top of a tail fin of the rotorcraft. The true airspeed of the rotorcraft flying at speeds that are lower than or equal to at least one airspeed threshold of the rotorcraft is calculated by correcting the measurements supplied by the airspeed sensor installed at the top of the tail fin as a function of the effects produced by the air stream generated by rotation of the main rotor of the rotorcraft on the characteristics of the speed of the air stream measured by the tail fin airspeed sensor. For this purpose, a correction rule calibrated in test flight is advantageously applied to correct the measurements supplied by the airspeed sensor installed at the top of the tail fin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.