JET-A1 density depending on fuel temperature
 

Hi gents,

I'm looking for the relationship between temperature and density for JET-A1 fuel. On the web I was able to find the density range only (.775 - .840), but not the correlated fuel temperatures. I would like to know how exactly the density changes when the fuel temperatur varies (e.g. during flight or due to mixing during refuelling).

Anybody in the postion to help? Either formula or table would be greatly appreciated.

Cheers and kind regards,

MAX

Ask and ye shall receive.

Each line is a specific density of jet fuel so find the one you want, and you can follow it through. Table courtesy of THIS website.

https://cimg4.ibsrv.net/gimg/pprune....8fc733f568.jpg

Be aware that fuel SG can also depend on the feedstock and the refinery.

Thanks a lot!

Best regards, MAX

This document is broadly used by industry and regulators.

https://apps.dtic.mil/dtic/tr/fulltext/u2/a132106.pdf

See page 25 for Jet A density vs temperature characteristics.

How can Jet A1 density be so varied? 40kg for 800kg at the same temp and volume? I would have thought that the standard would have been much tighter than that.

Amazing, indeed.
It's even more 775/840 kg/m3

according to ASTM D1655 specification