Accession Number : AD0863193

Title :   Hydraulic Circuit Breaker for Aircraft Hydraulic Systems.

Descriptive Note : Interim technical rept. no. 3, 25 Sep-25 Dec 69,

Corporate Author : MCDONNELL DOUGLAS CORP ST LOUIS MO

Personal Author(s) : Pierce, Neil J. ; Andrews, Robert S. ; Thurston, Charles T. ; Amies, Gerald E.

Report Date : DEC 1969

Pagination or Media Count : 17

Abstract : Automatic failure isolation in aircraft hydraulic systems, to reduce the probability of a single hit causing the loss of the complete system, can be accomplished by a number of methods. Reservoir level sensing, (RLS) senses a loss of fluid from the total system, and initiates a search for the failed subsystem. Flow sensing and comparison senses a loss of fluid from the subsystem, and shuts off the supply. Subsystem isolation allows transfer of power but prevents fluid transfer between the system and subsystem. Miscellaneous methods enable a loss of fluid to be sensed and shut off. The object of this part of the program was to collect and tabulate all the available data related to the subject from government and industry sources. The tabulated data was then used to compare the various techniques with the requirements for F-4 and F-15 type aircraft in the second phase of the study. The best concept from each of the three basic categories (RLS, flow comparison, isolation) was selected. (Author)

Descriptors :   (*JET FIGHTERS, VULNERABILITY), (*HYDRAULIC EQUIPMENT, CIRCUIT BREAKERS), LEAK DETECTORS, FLOWMETERS, DETECTORS, TEST METHODS, SIMULATION, COSTS, AUTOMATIC, CONTROL SYSTEMS.

Subject Categories : Attack and Fighter Aircraft
      Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE