Method and apparatus to overcome aircraft control problems due to wind shear
US4021010A · kind A · utility
Inventor
Key dates
| Filing date | Aug 29, 1975 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Aug 29, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D1/0676
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The inventive system requires that normal approach indicated airspeed and a predetermined approach groundspeed be used as the approach criteria, whichever is the least, compared to its own predetermined index value. These two values are the commanding functions fed to a fast/slow indicator and to any auto-throttle device on the approach, along with a "caution tailwind" warning device to warn the pilot whenever the groundspeed exceeds true airspeed by 5 knots or more, for example. If this warning activates, he should consider cancelling the approach and choose an approach from a different direction, determined by surface wind and his drift at the time of cancellation. This condition is caused by a tailwind component at altitude, the value of which the pilot can determine from his airspeed and groundspeed indications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.