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Aircraft always list their fuel load in "pounds" rather than "gallons". Is this to make gross weight calculations easier, or is there another reason? How do gallons and pounds correlate to each other?

Bob

<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote> How do gallons and pounds correlate to each other?<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
JP8 is I believe 6.8 pounds per gallon.

<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>Is this to make gross weight calculations easier,<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
I think so.

Liberalism is a mental disorder.

All I have to say is Big Hawg Fan is sketchy with all these questions...next thing you know he's going to start asking about the boarding ladder and slats, and then the air inlet guide veins! The stuff you really can't talk about!

PILSUNG!

"A fighter without a gun . . . is like an airplane without a wing."
-Brigadier General Robin

Actually, I already did ask about the boarding ladder. The slat info I got out of some books that I have. And the air inlet guide vanes are beyond the scope of my <u>Everything You Always Wanted to Know About the A-10 Warthog...But Were Afraid to Ask</u> seminars.

Bob

Just giving you a hard time...no air inlet guide vein. That's an old training jet-ism.

PILSUNG!

"A fighter without a gun . . . is like an airplane without a wing."
-Brigadier General Robin

Most aircraft, even the A-10, can use different types of fuels (JP4, JP8, etc.) and they have different masses per a given volume. Easier to measure by mass rather than volume.

ATTACK!!!!!!!

Good question, bad topic title. The word "deux" is french <img src=newicons/spit.gif border=0 align=middle> in origin. Bob, one of the things you have to learn is anything french <img src=newicons/spit.gif border=0 align=middle>is not allowed on this forum. The only exception to that is a good joke that mocks customs, food, mentality, culture, lack of testicular fortitude, automobiles, aircraft..well, you get the idea. As a matter of fact, if you're a member here, you're not even allowed to use french <img src=newicons/spit.gif border=0 align=middle> dressing on your salad. If you absolutely must use a french <img src=newicons/spit.gif border=0 align=middle> term or anything that has the word france <img src=newicons/spit.gif border=0 align=middle> or french <img src=newicons/spit.gif border=0 align=middle> in it, you must use lower case followed by <img src=newicons/spit.gif border=0 align=middle>. Just a friendly word (with tongue fimly planted in cheek) of warning.

OC













Some days it's hardly worth chewing through the restraints

Gee, I guess I don't know when I'm being conned. But considering my novice level of knowledge about the Hog, that's probably understandable.

Actually, when you mentioned air inlet guide vanes, I thought that you were referring to something that was mentioned on an internet site of several years ago, set up by Major Ed "Blade" Walker. This was an excellent site that gave tons of good info on the Hog. In his section on the engines, he states, "Variable inlet guide vanes automatically modulate throughout the engine operating range." I figured he would know!

Bob

BHF,

You are correct the engines do have VG's. As for changing back and forth from JP4 - JP8, the only thing I can remember is that it caused a lot of fuel control changes because it would deteriate the seals.

Faugh ah Ballaugh -Clear The Way

Visit <a href="http://www.flightchief.com">FlightChief Aviation</a>

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Faugh ah Ballaugh ~ Clear the Way

Gosh, Chief, I didn't realize that by using an "F-word" that I was committing such a serious breach of forum protocol. (LOL). I will certainly remember this for the future.

Actually, I'm not all that crazy about things having to do with F----- either, but they did make some important contributions to early aviation, and at the beginning of double-u double-u one, they were way ahead of us in aircraft production.

Bob

LH,

It seems that I read one time, long ago, that gasoline contains more energy per unit volume than kerosene. If that is true, then changing from a fuel that is 65% gas to one that is pure kerosene must have either caused the engines to put out less power, or to burn more fuel to obtain the same power. Are either of these statements correct?

Bob

<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>...that gasoline contains more energy per unit volume than kerosene.<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
Diesel has more energy per gallon than gasoline. I am addicted to my diesel truck and I would LOVE to see a diesel jet.

Liberalism is a mental disorder.

Well, I've never seen a diesel jet, but I have seen a jet diesel. There's a guy who has a Kenworth truck on which he has mounted a large jet engine with afterburner. He takes it around to drag strips and does exhibition runs. Sure looks cool at night!!!

Bob

That can be the A-10 engine upgrade - throw a Duramax up there instead of the TF-34<img src=icon_smile_big.gif border=0 align=middle>

Liberalism is a mental disorder.

To answer the actual question, aircraft fly in a balanced state. This balance changes as fuel is burned. Thus fuel burn is measured in pounds per hour and not miles per gallon which just wouldnt make any frikkin' sense at all.

"By this time tomorrow I shall have gained either a peerage or Westminster Abbey !" Nelson the Immortal Memory

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YGBSM !