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BaldieJr
08-24-2004, 02:33 PM
What is the specific gravity of aviation fuel?

No joke, I need to know so I can get the fuel guage to read properly.

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BaldieJr
08-24-2004, 02:33 PM
What is the specific gravity of aviation fuel?

No joke, I need to know so I can get the fuel guage to read properly.

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BaldieJr
08-24-2004, 02:40 PM
.69?

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Taylortony
08-24-2004, 02:42 PM
Jeez.......................... k water is 0.10 SG

AVTUR which is Aviation Turbine is about 0.79SG give or take a slight variation due to temperatures and is jet fuel

AVGAS which is Aviation Gasoline is about 0.696 SG give or take a slight variation due to temperatures ................... this is the one you are after for piston aicraft...


the reason u use this and not quantities like gallons is they expand with heat and shrink as it gets cool so the amount you get varies, therefore fill your car up when its cold http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif
......... weight always remains constant so by using the SG and calculating the figure you have an accurate fuel figure..............

and before u ask, i know cause it is my job to knowhttp://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif

BinaryFalcon
08-24-2004, 02:44 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>.69?<HR></BLOCKQUOTE>

Take this with a truckload of salt, since I don't remember when, why or where I read this, but I seem to remember that being right.

But like I said, I can't remember for sure where I saw it or how reliable the source was. I want to say it was on one of the RV groups, but it's been a while.

EDIT:

This page (https://airsport.com/aviagear/float.ihtml) seems to agree with the post above, and offers a couple of nice charts.

Taylortony
08-24-2004, 02:52 PM
BTW ignore the junk the conversion charts here will help ya out http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif

http://www.bp.com.au/products/aviation/network/sites.pdf

BaldieJr
08-24-2004, 02:53 PM
400 kg fuel = 881.84 lbs
881.84 lbs = 153.42 gallons

Where:
1 lb = 2.2046 kg
Weight of 1 gallon of avgas = .69(8.33), or 5.7477


So now I just need to find the capacities of every flyable plane in AEP and create a seperate guage for each, since each has a different value for 100% fuel.
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BaldieJr
08-24-2004, 03:18 PM
Handy link of the day:

http://www.peteducation.com/category_summary.cfm?cls=0&Cat=1305

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BinaryFalcon
08-24-2004, 08:43 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by BaldieJr:
400 kg fuel = 881.84 lbs
881.84 lbs = 153.42 gallons

Where:
1 lb = 2.2046 kg
Weight of 1 gallon of avgas = .69(8.33), or 5.7477


So now I just need to find the capacities of every flyable plane in AEP and create a seperate guage for each, since each has a different value for 100% fuel.
http://ubbxforums.ubi.com/images/smiley/35.gif

<HR></BLOCKQUOTE>

Oh, that's what you're after? Avgas weighs 6 pounds/ US gallon.

JetA is 6.4 pounds/ US gallon.

Just do it that way, it's easier (assuming I'm following you correctly now).

wayno7777
08-24-2004, 11:11 PM
Sounds right. UH-1H carries 209 gallons of JP-4 or 1300 pounds as the the fuel gauge reads. So a gallon of JP-4 averages 6.22 pounds in weight(US). I would have to go look the sg up in the manual so anyway what Tony http://ubbxforums.ubi.com/images/smiley/11.gif says is gospel. He still works it, I'm way out of practice.

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Platypus_1.JaVA
08-25-2004, 10:29 AM
Well, has fuel other gravity properties then water? http://ubbxforums.ubi.com/infopop/emoticons/icon_wink.gif

On earth, gravity is about 9.8

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2 For with what judgment ye judge,
ye shall be judged: and with what
measure ye mete, it shall be measured
to you again.

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DuxCorvan
08-25-2004, 07:04 PM
Platypus is right. Gravity is the same for everything on Earth. You should talk about DENSITY or SPECIFIC WEIGHT.

WTE_Galway
08-25-2004, 08:20 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by DuxCorvan:
Platypus is right. Gravity is the same for everything on Earth. You should talk about DENSITY or SPECIFIC WEIGHT.<HR></BLOCKQUOTE>


well, seeing fuel floating on top of water after taking a test sample from your tanks is certianly not an encouraging sign

BaldieJr
08-25-2004, 08:25 PM
I love it when people try to play smart.

Tell you what: I'll brew up some corn whiskey for you guys... only I'll ignore specific gravity of the results.

If I never hear from ya, I can reckon I botched it up.

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