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con spirito Member
Joined: 07 Apr 2007 Posts: 577 Location: Inflight
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Posted: Mon May 05, 2008 6:08 pm Post subject: Need for Tail tank in airliners? |
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Hello everyone. Can anyone please clear these jumbled questions running through my mind:
Why do modern airliners have tail tanks incorporated in them?
And how is the fuelling procedure carried out? Are the inboard tanks filled first or the outboard tanks? _________________ India is one of the richest countries in the world.
The only problem is........all the wealth is distributed in the wrong hands. |
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airindia787 Member
Joined: 18 Nov 2007 Posts: 770 Location: DAB & ZTF
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Posted: Mon May 05, 2008 6:51 pm Post subject: |
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I'm not an expert on the matter, but I think they do this for weight and balance. It is probably not used on short or empty flights.
Also, they fill the outboard tanks first and then the inboard tanks. There is a fuel door in the back for the tail tank. _________________ http://openflights.org/user/akumanduri |
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HAWK21M Member
Joined: 19 Dec 2006 Posts: 8132 Location: Mumbai, INDIA
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Posted: Tue May 06, 2008 10:47 am Post subject: |
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On Aircraft utilizing Horizontal stablizer fuel tanks,same can increase the range of the aircraft as the fuel capacity has increased.The fuel needs to be utilised from this Tail plane & difference in CG would need to be taken in account.
On wingtanks,the normal procedure is filling of Wing tanks & then center tank due structural reasons & also since most aircraft do not use suction fuel lines,if both Center tank fuel pumps are INOP,the center tank fuel would be unusable.
In case of a belly landing you would not want fuel in the center tank too.
The fuel in the center tank is consumed first by a lower pressure setting for the center tank boost pump check valve as compared to the pressure setting for the wing tank boost pumpm check valve.
Trust this helps.
regds
MEL _________________ Think of the Brighter side !!! |
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con spirito Member
Joined: 07 Apr 2007 Posts: 577 Location: Inflight
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Posted: Thu May 08, 2008 10:23 am Post subject: |
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Thanks a lot guys for enlightening me! _________________ India is one of the richest countries in the world.
The only problem is........all the wealth is distributed in the wrong hands. |
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D-ABTH Member
Joined: 22 Dec 2006 Posts: 837 Location: VABB :: BOM
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Posted: Thu May 08, 2008 1:05 pm Post subject: |
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yup.. Mel has more or less summed it up..
The tail tanks are normally never used for most intercontinental flights.. except for the real long distance ones. Then we do use the tail tank and the Capt will decide and tell the Ops agent how much he wants in the tanks and accordingly inform the fueling guys. He will also do the necessary trim corrections and instruct OPS accordingly for WAB. _________________ If it aint Boeing.. I aint going. |
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con spirito Member
Joined: 07 Apr 2007 Posts: 577 Location: Inflight
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Posted: Sun May 18, 2008 10:04 pm Post subject: |
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Thank you once again everyone and D-ABTH _________________ India is one of the richest countries in the world.
The only problem is........all the wealth is distributed in the wrong hands. |
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