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Flight Operation of a Pump-Fed Liquid-Hydrogen Fuel SystemA pump-fed liquid-hydrogen fuel system was developed and flight tested in a B57 bomber. The aircraft was flown to an altitude of 50,000 feet and a Mach number of 0.75 with JP-4 fuel in both engines. One engine was then switched to hydrogen operation for approximately 11 minutes.

The liquid-hydrogen pump used for these flights was a five-cylinder positive-displacement type submerged in the bottom of the hydrogen tank.

The hydrogen flow regulator was able to maintain a constant engine speed even though pump speed and discharge pressure oscillated.
Document ID
19680068699
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
David B. Fenn (NASA Lewis Research Center Cleveland, OH, United States)
Loren W. Acker (NASA Lewis Research Center Cleveland, OH, United States)
Joseph S. Algranti (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 4, 2013
Publication Date
April 1, 1960
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NASA-TM-X-252
E-428
Report Number: NASA-TM-X-252
Accession Number
68N83510
Funding Number(s)
PROJECT: X-252
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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