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Questions tagged [fuel-tanks]

Large cavities that store fuel, typically in the wings and/or belly of the plane.

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Where are the fuel tank sumps on an Aquila A210?

When I drain the fuel I have to do it three times: In addition to the drainer openings on both undersides of the wing and under the front fuselage (3 times in total). Can you tell or show me where ...
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Does the FAA have any special requirements for oxidizer tanks on rocket-powered aircraft?

There are quite a number of strict FAA requirements for aircraft fuel tanks (must withstand such-and-such many Gs from such-and-such directions, must be inerted, must be puncture-resistant, et cetera, ...
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1answer
694 views

What type of aircraft did these drop tanks come from?

I am trying to identify what type of plane my two recently acquired drop tanks came from. They measure 23" in diameter and about 12' long. Made of aluminum and "ALCOA" appears in raised letters on the ...
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8answers
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Why are fuel tanks located in wings?

Passenger aircraft have fuel tanks in the wings. Why? What are the advantages and disadvantages of this location ? examples of disadvantages I would suspect: added weight increases the structural ...
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1answer
347 views

Why do the A320's centre tank pumps stop working 5 minutes after the low level has been reached?

I'm new here and I'm in training course for Airbus A320. In the training material, it's said that the centre tank pumps are controlled to stop automatically 5 mins after the low level fuel has been ...
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39 views

Fuel Trailers and Pumps

Are large 100LL semi-truck trailers (>9300 gallons) provisioned to pump fuel into smaller tanks? I know they can gravity feed into large underground tanks but I need to know of they can also be ...
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2answers
512 views

How do they fill fuel in big aircraft?

Being a passenger, I usually will have view from only one side of these planes and hence don't know if same thing is happening on other side of the plane. I have observed hoses connected to wings, but ...
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6answers
3k views

Is there a tank priority sequence for using the fuel tanks?

Is there a tank priority sequence for using the fuel tanks, or does the pilot decide?
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3answers
285 views

How the fuel in the wings is managed in case of an engine failure?

Consider an aircraft has fuel tanks only in wings (No central tank). Will the fuel for the respective engines will be consumed from the respective wings? In case of a single engine failure, if the ...
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4answers
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What could the fuel pump failure have been that my flight experienced?

I was on an Easyjet flight (I think an A320), when mid-flight, I overheard a member of cabin crew tell another passenger there was a 'technical' issue with the aircraft, that might make us slightly ...
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2answers
272 views

Would it have been feasible to install 'conformal fuel tanks' on the Mercure?

The Dassault Mercure was a short-range twin-jet airliner. It was canceled with sales not reaching the breakeven point. Other similar jetliners like the Boeing 737 had a more convenient longer range. ...
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1answer
283 views

Why do aerobatic aircraft have separate tanks instead of a single acrotank?

I've been reading about fuel tanks in aerobatic planes such as the Extra 330, Edge 540, XA41 and I don't really understand why in the Extra 330 there are separated center tanks and an acrotank instead ...
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How does the FAA define fuel capacity for ultralights?

Ultralights under FAR 103 are regulated to a capacity of 5 gallons. I'm wondering how exactly fuel capacity is defined, does it include fuel in the lines, and in the carburetor bowl or elsewhere or ...
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1answer
921 views

How are fuel tanks cleaned out?

One episode of the BBC series "Engineering Giants" featured a BA 747 undergoing a multi-week "D check". Here the inside of a fuel tank was surprisingly clean and dry (to me): ...
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3answers
7k views

In WW2, were self-sealing fuel tanks really cost-beneficial?

I just read this question and answer, which seems to confirm my fears that an incendiary bullet will still destroy you if it hits your fuel. In other words, a self-sealing fuel tank will not protect ...
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2answers
809 views

Is there any particular reason the A380 doesn't have a centre wing tank?

Today I learnt something new, but apparently the A380 has no centre wing tank, which leads me to ask, is there a specific, design reason for this? Or did Airbus just think those huge wings were big ...
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1answer
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Is the entire length of a B747 or A380 wing used as a fuel tank?

It is generally understood that the fuel tanks of aircraft are in the wings, but specifically, is the entire length of the the wing of: an Airbus A380 Jumbo used as fuel tank? a Boeing 747-800 Jumbo ...
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1answer
16k views

How much fuel does an A380 hold and where?

How much fuel does an A380 usually carry (in litres) and what is the maximum? How much is in each wing? How much is in other fuel tanks and where are they?
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3answers
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Is center tank fuel required to start the 737-800 engines?

I have been doing some flights with the 737-800 and when there is no fuel in the center tank, the engines won't start. Is it like that in real life?
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2answers
4k views

Have any operational aircraft ever used over wing fuel tanks?

We are most familiar with under wing fuel tanks, has any operational aircraft ever used over wing fuel tanks?
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1answer
298 views

What would happen if you shot an F-16's fuel tank? [closed]

Let's suppose you have a 20mm sniper rifle and shoot the internal fuel tank of an F-16 coming directly towards you. What would happen ?
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4answers
2k views

Is there any work on improving fuel tanks so they could store hydrogen?

I think that hydrogen is among the best fuels for use in supersonic and hypersonic flight, is there any work on improving fuel tanks so they could store hydrogen? What would be the best state to ...
12
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1answer
427 views

Do large aircraft accumulate water in their tanks?

Do large aircraft accumulate water in their tanks? If so, how is it drained? How often is it drained? At what rate per hour does it accumulate? If not what was done to circumvent the problem?
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1answer
238 views

How is that there is no leak through the fuel vents during aerobatics maneuvers?

Can anyone tell me how aircraft such as jet fighters and stunt planes design the fuel tank vent system to prevent fuel leaking through the vents when performing aerobatics, 360 flips and complex ...
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2answers
861 views

How many tanks does an A350 have?

How many tanks are there on an A350? Where are they located? Is it a common configuration among large aircraft?
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3answers
2k views

How are wing tanks sealed around the internal wing structure?

I can easily grasp the idea of tanks of fuel inside the fuselage of an aircraft, and the ease of sealing such tanks in a relatively standard shape. However, I'm having a hard time understanding how ...
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1answer
637 views

How does switching off pumps and putting on MAN switch resolve low pressure?

FUEL If the center tank is less than 200 kg (440 lb) for the flight: Apply the following procedure, if your airline is affected by FUEL CTR TK PUMPS LO PR cautions on ground or in flight when the ...
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6answers
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Is fuel moved around during flight on a passenger or cargo plane? If so why?

Is fuel moved around during flight on a passenger or cargo plane? If so why? Is balance an issue?
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2answers
1k views

How often are drop tanks actually dropped?

I know drop tanks are used to extend the range on many fighter jets, but how often are they actually detached from the plane once empty? A lot of WWII movies and documentaries show tanks being dropped ...
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1answer
129 views

Would fuel quantity indications be affected by extended flight at nonzero bank angles?

If flying with a 20kt crosswind requiring yaw input as well as roll input to maintain course, would the fuel indicators show different loads depending on the roll angle of the aircraft (in this case, ...
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6answers
21k views

Why are fuel tanks in the wings filled first, and why are they used last?

When fueling airliners, why is fuel filled first in the tanks in the wings and then the center tanks? And why do they use fuel from the center tanks first and then from the tanks in the wings? From ...
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2answers
238 views

How are fuel tanks tested and certified?

What ground tests are carried out for testing and certifying wing fuel tanks for use in passenger aircraft? Is there any chamber to simulate flight conditions? If so, how is the chamber constructed?
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2answers
469 views

What fuels can turbofans burn?

I know that Jet-A is the fuel most often used for turbofans, but is there something else that these engines can burn? (ethanol, LPG, methane, butane, 100LL, etc.) Basically, can a turbofan burn ...
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3answers
2k views

What is a fuel tank float valve and how does it work?

This report on dodbuzz mentions a 'fuel tank float valve'. Neither google nor StackExchange seem to know what it is. What is it, why is it necessary?
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1answer
2k views

How is fuel removed from a light aircraft if required for weight and balance?

With small, light aircraft, weight is always a consideration. Say you had a four-place single engine aircraft that you wanted to take yourself and three of your (non-FAA-standard weight) friends, but ...
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1answer
334 views

Are there certain areas where a pilot can jettison his/her external fuel tanks?

When a pilot feels the need to jettison their external fuel tanks, do they have to wait until they are above a certain area, or can they just drop them wherever they please?
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1answer
172 views

What are the general problems faced for maintenance in fuel inerting systems?

Currently most of the nitrogen generation systems have Air Seperation Modules (ASM) and other associated mechanical components to generate Nitrogen Enriched Air. Hence, are there any inherent ...
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2answers
605 views

Do fuel tank locations on the wing cause a potential for weight imbalance?

I have a question about fuel tanks in an older plane like a P-36C Hawk and a P-26B-35. The fuel tanks in the P-26 are placed in the wings and in the P-36C Hawk its under the pilot and behind him. For ...
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6answers
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Can a wide body airliner land safely with a full fuel tank?

Can a commercial double-aisle jet aircraft (e.g., 777, A330) land safely with a full fuel tank (minus the fuel spent on taxing and takeoff)? Has that ever happened?
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2answers
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How does the MiG-23 fuel system work?

In what order are the fuel tanks on the MiG-23 used? In other words, which tank is used first, then second etc.?
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2answers
567 views

Why does flying inverted in a jet trainer starve the engine of fuel when there's a pump?

Such planes have an engine-driven fuel pump. If the pump isn't strong enough, wouldn't suction feeding assist? How does a modern fighter jet / aerobatic plane overcome this? Also, any general ...
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2answers
1k views

Was there a design flaw in the fuel tanks of the MiG-15/17/19/21?

Wikipedia article on MiG-15: Another major design deficit was that the tank could develop under-pressure if more than half the fuel had been used, which could easily lead to tank implosions, ...
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1answer
6k views

What is the capacity of the vent surge tank in an A320?

If the wing tanks of an A320 are fully filled and the fuel expands due to high temperatures then the fuel overflows into the vent tank. My question is, does the fuel get stored in the vent tank? If ...
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1answer
467 views

Is there a backup to fuel inerting systems?

I've heard it said many times that "everything has a backup" in commercial planes. What about the fuel inerting system (injecting nitrogen in the fuel tank). Does it have a backup? Is it somehow ...
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2answers
2k views

Can we eliminate the center tank of large passenger planes?

This is a safety question about fuel and fires. This all regards commercial aviation for large passenger planes. Most fuel is stored in the wings, but in the largest planes, there's also a center ...
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2answers
772 views

What to do with excess fuel before flight?

I've read that it's recommended to store a plane with full fuel tanks to prevent water contamination. Some small general aviation planes, however, would exceed their maximum gross take off weight ...
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1answer
811 views

Why isn't testing fuel flow from both tanks a run-up checklist item?

On most single engine GA aircraft, testing both mags is always on the checklist. For a plane (like a Mooney M20) that doesn't have a "both" selector, it would seem prudent to throw the switch to ...
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2answers
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Does the 300 hp IO550 conversion require an auxiliary tank on the Cessna 182?

Does the 300 hp conversion with a continental IO 550 always require an auxiliary tank when used on a Cessna 182? I see some of these conversions indicate an auxiliary tank is present under pilot seat ...
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1answer
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What is the role of baffles in Fuel Tanks? [duplicate]

I think there are many baffles inside the shape of Fuel tank. What kind of advantage they do? Do they help in managing the oscillations in-flight?
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2answers
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Does the cockpit have an alarm to warn about fuel leakage?

Is there any indication to the crew of the aircraft about any potential leakage of fuel from any part of the plane?