With regard to the fuel/air mixture in the space above the fuel in the tanks, which should be a consideration in refueling?
Mixing Jet A and JP/4 produces a fuel/vapor mixture that is ignitable through a wide temperature range.
Gasoline-type fuels (Jet B) produce a rich mixture which is easily ignited at normal temperatures.
Vapor pressure of Jet A type fuel is too high to develop an ignitable mixture at normal temperatures.
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