Aeronautics and astronautics – Aircraft control – Automatic
Patent
1975-08-29
1977-05-03
Kunin, Stephen G.
Aeronautics and astronautics
Aircraft control
Automatic
73178T, 23515022, 244188, 340 27SS, G05D 108, G05D 112
Patent
active
040210103
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.
REFERENCES:
patent: 3033035 (1962-05-01), Snodgrass
patent: 3105660 (1963-10-01), Lenefsky et al.
patent: 3711042 (1973-06-01), Rempfer et al.
patent: 3868497 (1975-02-01), Vietor
patent: 3892374 (1975-07-01), Lambregts
patent: 3920966 (1975-11-01), Knemeyer et al.
Haefliger William W.
Kunin Stephen G.
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