Development of an Electro-Pneumatic Anti-G Valve for High Performance Fighter Aircraft
AIR FORCE AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH
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A new concept for an anti-G suit valve was designed and built. The valve is designed specifically to protect aircrew from the unique physiological hazard of high onset rate, high sustained acceleration. The design is a hybridization of a conventional inertially operated valve and uses an electronically controlled solenoid to drive the anti-G suit pressure to the maximum when the level of acceleration exceeds both 2Gz and an onset rate of 2Gsec. After a 1.5 sec period the valve reverts to inertial operation unless the trigger criteria are fulfilled again. Relaxed tolerance of 15 human subjects was determined under high rate of onset centrifuge testing of the new valve with and without ready pressure versus the standard valve and a high flow ready pressure valve. The new concept provides a 1G improvement over the standard valve, and a 0.5 G improvement over the high flow ready pressure valve. On the basis of published data taken under similar conditions, the new valve appears to provide a 0.5 G improvement over all electronic servo valves. Pilot acceptance of this rapid acting concept has been favorable.
- Attack and Fighter Aircraft
- Protective Equipment