Hard Time

File: 082696_d50030_053.txt
Page: 053
Total Pages: 101
`16.  Does using JET A-l in diesel fueled equipment cause the engines to run
hotter?

      Answer:  No.   JET A-i has a slightly lower volumetric heat content
               (i.e., HTU/gallon) than diesel fuel and therefore will not
               burn hotter.

17.   What is JP-i?

      Answer:  JP-1 was the first US jet fuel developed in 1944 and
               described by the specification AN-F-32a.   The JP abbreviation
               stood for "Jet Propellent".   This kerosene base fuel was
               followed by JP-2 and JP-3 and in 1951 the JP-4 specification
               was developed.  The JP-I term apparently being used in Saudi
               Arabia does not describe the original specification mentioned
               above but instead the commercial JET A-t fuel.

18.   Does using JET A-i in HMMWVs and CUCVs cause the fuel injector pumps to
fail?

      Answer:  No. The problems that have occurred have been the result of a
               "flex ring" failure on the Covernor Weight Retainer assembly.
               This problem had surfaced in commercial GM 6.2L engine appli-
               cat ions which had in turn led to the introduction of the ElD
               Weight Retainer by the pump manufacturer in ~985 as a replace-
               ment of this original "flex ring".  tJnfortunately, many of the
               fuel injector pumps within the supply system still have the
               original part.  Using JET fuel does not cause this problem to
               occur.

19.   Do micro-organisms (i.e., bugs, bacteria,  fungus, etc) grow in JP-8?

      Answer:  No.   Microbiological growth will not occur in JP-8 fuel as
               this fuel contains the Fuel System tcing Inhibitor (FSII)
               which also reduces the tendency of micro-organisms to exist
               in fuel tanks.  Without the FStl being present, micro-
               organisms will grow if water contamination exists in the Euel
               tank environment.

20.   What is a "biocide"?

      Answer:  A biocide is a chemical compound which when added to a liquid
               or petroleum fuel functions as a sterilizing agent; i.e.,  it
               will kill all micro-organisms present.  The proper application
               of a biocide to a system for which that biocide has efficacy
               (i.e., produces its intended effect) will kill all susceptible
               micro-organisms in the system.  An example of a biocide
               available in the military supply system is the ~IL-S-53OZ1
               Diesel Fuel Stabilzer.  (See Question No.  13).