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Old May 20th 06, 01:14 PM posted to rec.aviation.piloting
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Default Jet fuel A-1 specific gravity

"Tim Epstein" wrote:

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When I was involved in the design-build project of at least two A-1
pipelines here in the United Arab Emirates, I recall seeing the bid
documents state the Specific Gravity of A-1 as being between 0.78 and
0.84.

Can anyone point me to a link that endorses this range as an accepted
international standard for A-1, thank you?


You might want to add in units after the percentages. Don't forgot
about what happened with the Gimli Glider...


Specific Gravity, now more commonly called Relative Density, has no
units. It is the ratio of the weight of a substance to the weight of
water at standard temperature (15.6 degrees C or 60 degrees F). The
number is the same using either English units or Metric units. The
standard method of measure is to use a hydrometer and adjust
to the standard temperature using tables.

What you are thinking of is density, which is kg/cu meter.

To answer the original question, the specification for Jet A-1 is
maintained by the ASTM. Here is the specific specification number which
contains the properies of aviation fuels:

ASTM D1655-06

I don't have a copy of the spec handy, but I believe the range is 0.775-
0.840