A SURVEY OF FUELS SUITABLE FOR EXTERNAL COMBUSTION APPLICATIONS
GENERAL APPLIED SCIENCE LABS INC WESTBURY NY
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A survey was made of large number of fuels in an effort to determine the most suitable for use in a specified external burning application. The original list of 27 fuels in five classes is reduced to nine acceptable fuels JP-4, JP-5, acetylene, TEA, TMA, TEB, TBB, pentaborane and aluminum borohydride. The latter six of these fall into the class of pyrophoric fuels. Additional limitations tend to reduce this list still further. For example, under the flight conditions of interest, spontaneous ignition of JP-4, JP-5 and acetylene is marginal. At the lower condition of cone surface temperature 135F the high spontaneous ignition temperature of TBB 190F makes this fuel unacceptable. In addition, availability of pentaborane and aluminum borohydride is extremely restricted, and prices are very high. As a result, for most missions carried out in the specified ranges of flight conditions, the three pyrophoric fuels, TEA, TMA, and TEB appear to be the most satisfactory.