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Accession Number:
ADA076904
Title:
A New Anti-G Valve for High-Performance Aircraft
Descriptive Note:
Final rept. 1 Jan 77-1 Jan 79
Corporate Author:
SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
Report Date:
1979-11-01
Pagination or Media Count:
56.0
Abstract:
The USAF School of Aerospace Medicine USAFSAM Crew Technology Division has developed an advanced anti-G valve for pressurizing the anti-G suit during exposures to acceleration. The anti-G valve presently in fighter aircraft has been determined to operate too slowly for rapid onset of G, potentially causing pilots of high-performance aircraft to black out, lose consciousness, andor become fatigued. The time relationship to G-suit pressurization using the conventional anti-G valve was found to be sigmoidal, having two relatively slow pressurization phases--one early, and the other late--in the suit-inflation schedule. Elimination of these two slow phases were accomplished by a preinflating the anti-G suit to 0.2 psi prior to an increase in G called Ready Pressure and b increasing the capacity of air flow through the anti-G valve called Hi-Flow. The development of the Hi-Flow Ready Pressure HFRP anti-G valve by USAFSAM increased in the rate of G-suit pressurization threefold. This HFRP anti-G valve was tested on eight F-15 pilots, using the centrifuge at the Naval Air Development Center, Warminster, PA. A comparison of this experimental valve with the conventional anti-G valve presently operational in the F-15 aircraft resulted in a high degree of pilot acceptance, because the HFRP valve had better valve response, reduced valve error scores, and allowed the pilots to tolerate high-G exposures with less effort. Author
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
