This volume limitation aspects of hydrogen have precluded its use in subsonic aircraft. The possible inclusion of the C-5A aircraft in the Air Force inventory has aroused new interest in the application of hydrogen to a normally hydrocarbon-fueled aircraft. This report presents an over-all evaluation of the safety, ground handling, tankage, and use aspects of the dual use of hydrogen and JP-4 fuel. The report shows that the possibility of ...
To date the application of subcooled hydrogen has been directed towards specific vehicle systems. The use of hydrogen in its subcooled state, however, should be considered for any system anticipating the need for hydrogen. This report presents information on the desirability of using subcooled or slush hydrogen in a number of general cases. With this information, the system planner can choose those characteristics which suit the vehicle under consideration and ...
This report contains a general analysis of the costs of operating a slush-hydrogen-production system with and without reliquefaction of the effluent gas to determine whether the costs involved would be too great to make the system feasible. Two reclamation schemes were considered - a cold vacuum pump system and a warm vacuum pump system. This analysis indicates that the slush-hydrogen-production process is a feasible way to maintain liquid hydrogen with ...
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