Based on the ASTM D1655 standard specification for turbine fuels, the only difference between Jet A and Jet A-1 is the freezing point. Max [min?] -40 degrees Celsius (-40° F) for Jet A and max -47 degrees Celsius (-53° F) for Jet A-1. Also, Jet A is widely available in the US (high latitudes).

From my understanding, if Jet A (with higher freezing point) is suitable in colder regions (e.g., the US), it should also be suitable in warmer regions (e.g., tropical countries), as it is already hard to reach -40 degrees Celsius (let alone -47 degrees Celsius) in tropical regions. Assume that both have the same altitude.

So, my questions are:

Are there any feasibility studies or research regarding usage of Jet A fuel in tropical countries? Please share!


Could someone provide information of the cost production differences between Jet A and Jet A-1?

Much appreciated guys!

  • 1
    $\begingroup$ What sort of "research regarding usage" are you looking for? Are you just trying to find out whether or not Jet-A is used in tropical countries, or are you looking for other information as well? $\endgroup$ Dec 24 '18 at 15:47
  • $\begingroup$ One thing is temperature on the ground, another temperature at the cruise level. Keep in mind it's worth climbing as long as it's getting colder. $\endgroup$
    – Jan Hudec
    Dec 24 '18 at 23:23
  • $\begingroup$ And third thing is temperature at destination. And aircraft fuelling in a tropical country may be landing in an arctic one, or be overflying the North Pole, a couple of hours later. Do you want to complicate things by stocking multiple fuels? $\endgroup$
    – Jan Hudec
    Dec 24 '18 at 23:26
  • $\begingroup$ @tanner-swett, for starter I want to know whether Jet A was used in tropical countries, and why don't they use it anymore. Like I said in my question, if Jet A is already used in colder region, it should be suitable in tropical region. So, why don't they use it? It is cheaper to produce (though I still don't know how much cheaper). $\endgroup$
    – arsenalist
    Dec 25 '18 at 1:59
  • $\begingroup$ @jan-hudec, please explain "it's worth climbing as long as it's getting colder". Isn't it dangerous if your temperature at cruise level getting colder as it may cause the fuel freezing? $\endgroup$
    – arsenalist
    Dec 25 '18 at 2:03

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