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JET-A Density - Temperature relationship

JET-A Density - Temperature relationship

JET-A Density - Temperature relationship

(OP)
Is there a useable formula to correlate temperature to fuel density particularly Jet-A ? I am aware of the Coefficient of Thermal Expansion value of 999 x 10E-6 (ie .00099) per Deg C but reluctant to use this as there may be other variables to consider... Trying to plan airplane fuel requirements in gallons since most flight planning systems work in pounds.

RE: JET-A Density - Temperature relationship

i'd've thought the the denisty/temperature relationship was reasonably linear over the practical range (plus/minus 40degC).

i'm guessing that your coefficient is for volume change and that it is independent of the volume unit, ie .00999 gallons/gallon/degC

RE: JET-A Density - Temperature relationship

Shell used to give out a CD which discussed jet fuel in detail. Old memory is vague as to details in it tho.

RE: JET-A Density - Temperature relationship

The attached file has the thermal expansion plots for all sorts of fuels and at temps from -60F to +160F. They all are linear over this range of temps. It also has the cover page in case you need to give a refernece.

FYI, from what I understand these handbooks are available at a reasonable cost. How much and where from, I don't know as my previous employer bought them. But, they've got all sorts of conversion tables, physical properties, aircraft performance, engine performance, etc. data.  

RE: JET-A Density - Temperature relationship

Onaquest...

How did You get lucky enough to get a P&W Aeronautical Vestpocket Handboook?

Regards, Wil Taylor

RE: JET-A Density - Temperature relationship

Wil, I've got a copy ('71, a little shop worn ) that I would give you, but I don't know how without violating the rules of the board. Maybe post it on Ebay with a cheap "buy it now"?

RE: JET-A Density - Temperature relationship

For now I'll have to settle for my '57 GE Aircraft Propulsion [vestpocket size] Data Book and my '65 TRW Space Data booklet.  I surely preferred the P&W engines to the GE's, but I never got a Vestpocket Handbook.  If somebody finds a commercial source of the P&W handbooks, I would really like to acquire one.

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