Ejection sequencing system with airspeed and altitude sensing

Details Ejection sequencing system with airspeed and altitude sensing Ejection sequencing system with airspeed and altitude sensing

1976-06-08

1977-11-08

Blix, Trygve M.

Aeronautics and astronautics

Safety lowering devices

Parachutes

73204, 73212, 244122AE, B64D 1762

Patent

active

040572064

ABSTRACT:
An ejection sequencing system used particularly in an ejection seat operation includes continuous sensing of both airspeed and altitude. The continuous airspeed sensing is accomplished by continuously measuring the airstream temperature and then determining the optimum instant for parachute deployment from the measured temperature, thus making the deployment event temperature-responsive. When the sensed airspeed is within a predetermined acceptable limits, a first signal is generated. Continuous altitude sensing is accomplished by an aneroid barometer and when the sensed altitude is within predetermined acceptable limits, a second signal is generated. When these first and second signals are transmitted to the parachute container, they initiate parachute deployment. Redundant, failsafe system operation can be provided through the use of two or more interconnected airspeed sensing devices having fixed time delays for backup.

REFERENCES:
patent: 2536037 (1951-01-01), Clousing et al.
patent: 2661624 (1953-12-01), Bechberger et al.
patent: 2750798 (1956-06-01), Ruskin et al.
patent: 2959958 (1960-11-01), Savet
patent: 2970475 (1961-02-01), Werner
patent: 3067973 (1962-12-01), Halsey et al.
patent: 3547383 (1970-12-01), Carpenter
patent: 3669388 (1972-06-01), Kreuningen

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