Airfoil position range selecting, indicating and warning system

Details Airfoil position range selecting, indicating and warning system Airfoil position range selecting, indicating and warning system

1975-07-14

1977-07-05

Caldwell, John W.

Communications: electrical

Selective

Having indication or alarm

73 65, G08G 500

Patent

active

040343340

ABSTRACT:
To assure takeoff controllability of aircraft of the type having movably mounted stabilizers, a plurality of different stabilizer position ranges are established, any one of which may be selected by a range selector switch operated by the pilot. Proper pilot selection of an available stabilizer range depends on the gross weight and the location of the center of gravity of the loaded aircraft. This dependency is automatically accounted for by sensing the amount of load on the nose landing gear, by means of a pressure sensitive switch associated with the nose gear shock strut. The condition of the pressure switch indicates the proper range of stabilizer positions as a function of the gross weight and location of the aircraft's center of gravity. Circuit means compare the condition of the pressure switch with the position of the range selector switch and a range warning indicator is actuated if the nose loading requires a different stabilizer range. In another embodiment, the pressure sensitive switch is connected to a stabilizer range selector circuit for automatically selecting the proper range.

REFERENCES:
patent: 3051416 (1962-08-01), Rotier
patent: 3310976 (1967-03-01), Bussell et al.
patent: 3415979 (1968-12-01), Bussell et al.
patent: 3636321 (1972-01-01), Kirschner
patent: 3847445 (1974-11-01), Bissell et al.
patent: 3880385 (1975-04-01), Reynolds
Hawkins, Instruments and Control Systems, Feb. 1965, pp. 89-93.

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