I’m a fueler at BNA & lately have been working with Southwest which only flies 737s - watching your videos have given me such an appreciation for my job and I’ve literally enjoyed working there more knowing more about these planes than I received in our training. Keep up the good work. It’s so nice to be able to look at the dozens of 737s I see daily and understand why they are the way they are. Thanks :)!

It’s channels like these that make me realize that I haven’t turned on my TV to watch cable in months! Thanks Mentor!

I had no idea aircraft wings were also fuel tanks. I'm bingeing your videos at the moment and learning such a lot. Your channel is excellent.

While killing time waiting for my flight, I noticed a working crew fueling a plane through the wing which got me curious. I'm glad I googled it and found this channel. Gave me a lot of insight on why.

This man is contributing a lot to the public. Thanks a lot. Keep moving.

I felt like a center fuel tank being loaded with awesome information. Thank you Captain!

I have been flying small aircraft for decades. I love to fly! I have just found this chanel and I find it extremely professional. Very clear scientific explanations served one bite at a time. Great chanel!

You are a walking aeronautical encyclopedia. I am no pilot but enjoy learning how things work. Thanks for posting these videos..

i've always been fascinated by planes but wow this video shows just one element of the plane and how well constructed and well thought out this flying bus really is, keep the videos coming

Your videos have really helped me with my fear/anxiety of flying. I have had to fly twice in the last year alone and it is a terrifying ordeal for me. Being a gear-head myself, it is so reassuring to know how a plane actually works. Thanks!

In a documentary about airplanes, it was said there was so much space in the wings so the engineers decided to store fuel in there. It created more space in the fuselage for passengers and cargoes. Function followed by science.

I'm learning so much from this channel, thank you so much. The Swedish accent is also very nostalgic for me , as my dad worked in Sweden in the 80s and 90s. 😊

"The Wings was perfectly designed to flex" Wings: "Bruh, do you even lift?"

Your videos are so nice to watch and it's so stress-relieving just to look at the positive man talking about aviation stuff with a high level of professionalism and a constant smile on his face!

That was a really fascinating video. I'm a Chemical Engineer so its very interesting to know how similar safety principles used for fuel storage and transport in refineries are applied to the fuel systems in aeroplanes.

I love watching this channel, when I was a small boy I admired to be a pilot but later a long the way my dream wasn't achieved. When I watch this channel I get to easily learn more of what happens in the skies. Big up to this senior captain for always sharing this information. Fly high and high sir❤️

I always thought that the fuel tanks were in the wings. It never occurred to me that the fuel tanks were the wings.

Thank you Mentour so much for this explanation of the fuel storage , I have to say that there is no one out there on KZfaq or outside, explaining the Boeing 3 800 NG the way you do, just unique. yes, I liked the new feature about the nitrogen.

Highly appreciate the way you have explained as to why Fuel Tanks are located where they are located, I am in my seventies but such information is always beneficial.... Thank You.

THANK YOU..... I find it absolutely terrific that people like yourself generously share their knowledge here. MUCH appreciated!

I love the footage inside the center tank. I worked in the wing shop on the Citation X, where the largest part was still tiny, so now I'm jealous of those people who didn't have to contort their arms and hands to buck the rivets, lol.

And what did we learn in this episode? Engineers are damn smart people. :)

Love hearing about these obscure systems we are completely unaware that are keep us safe. Excellent vids

Just got a job as a refuler XNA, so, doing all the YT learning and plane research I can before my first day, they of course train you, but knowing what to do and what to expect and why things are done is always good.

The holes in the ribs in the wings of the aircraft are called baffles. They act like seperators to prevent the fuel from sloshing around inside the fuel tank.

I am a teacher. The way he explains the things just like a teacher. I used to think where the fuel is store in the aeroplane but my doubts are cleared today hats on sir

Thanks for your video! Well explained, fuel system is a very wide subject and just the effort to consolidate it in 12 min is very well👉 appreciated.

Consistently fascinating and beautifully produced content on a subject that captured my mind and imagination for much of my 61 years. Aviation and flight, the machines, the theory and tech., aviation's turning points, aviation heroes, as well lessons learned from tragedy. Deep bow to you sir.

Excellent video. You just forgot to mention that for £ 12.89 Ryanair let you fly in a wing with your mouth just above the fuel level.

Thanks for great explanation. :) Your channel always provides easily understandable information.

Since I started working in the airport as the pax bus driver, have been really interested to know much about the aircraft and how they operate both on ground and on Air.. Thanks for your channel has been so helpful to me🙏👌

Thank you. Am a Telecommunications Engineer with a passion in aeronautical engineering. Such info comes in handy

Thanks for the excellent explanations. For a person like myself who is not a pilot or wanting to be a pilot, this is very nice to know these background details.

I commented on another of your vids, suggesting that you move the sponsor advertisement, which would be of interest mainly to students, to the end. I see that you have done that here and I think it works very well. I'm not a student myself, and even *I* watched the ad! Thanks for another informative video. I would be interested in a video or three that talked about the role of ATC and how pilots interact with it, both on short-haul and long-haul (incl. trans-oceanic) flights. I myself, a non-pilot, have, for example, a vague idea of zones of ATC control (in the USA anyway) and that "hand-offs" occur between them in some way, but have no understanding of the details and no idea if it all works the same way everywhere in the world. Likewise it would be interesting to know what (if any) hierarchies of ATC exist - for example are there national/regional/local ones that have different responsibilities and authorities? I'm sure many of your viewers already know all this but I suspect that most do not. Another idea for a vid: my civilian airport, GEG, lies only a few miles from an Air Force base. SEA has several large military aviation facilities nearby. How is ATC coordinated between military and civilian authorities in shared airspace? Who has authority (military vs civilian), over what, under what circumstances, and how do they manage to stay on the same page?

You just cleared the many questions I had in my head since I never studied aviation. Am now knowledgeable

Thank you for making it so easy to understand with your articulated explanation of an important topic on aircraft

Ok but if the wings fall off, how would the plane get the fuel to land safely? Oh ok never mind..

Man - this guys' good - well explained - I could listen to him for hours ! thx much for posting

One interesting thing I learned flying with my dad is as you fuel up the wings, they actually sag a significant amount. His plane has a 30' wingspan, the wings would sag about 6" at the tips when fully loaded with fuel. Also, the more fuel, the less the turbulence is, by a LOT. With almost empty tanks it feels like you are on a roller-coaster sometimes, with full tanks, the turbulence is probably 1/2 or a 1/4 of what it is empty.

Extremely well explained in simple terminology. My brother and two second cousins were private pilots, and I can appreciate and relate to your in-depth explanations. Thank you.

This was another fine presentation, which I appreciate. If you are looking for ideas for future videos, I second the idea to tell about the great flexibility we see in wings now, and also why the wings are now so narrow. Thank you. Michael.

I was surprised when I found out that the deHavilland Beaver has belly tanks. But, that was a part of it being a purpose built bush plane. Apparently, it makes it easier to refuel with gas cans. Makes sense, not having to climb into the wings with a gas can to refill it in some remote outpost.

There's a good analogy to storing fuel in the wings-tightrope walkers who carry a heavy pole. The danger with tightrope walking isn't failing to step down squarely on the rope. That's easily learned. It's maintaining a vertical stance, not rotating about the rope far enough to one side or the other that you fall. Think about it a moment. Once you start leaning to the right, how do you correct that? There's nothing to grab on. That heavy pole extending far out to the side helps in two ways. First, because of its length, it creates rotational inertia. It takes far more force to cause you to rotate. That makes balancing easier. Second, it offers a way for the walker to adjust his balance. He simply moves the pole slightly. If he starts to fall to the left, he can just move the pole a bit to the right to restore his balance. Planes are much like that. Having the weight of the fuel out on the wings makes the plane more stable than it would be if all that weight were close to the centerline. And being able to consume fuel from those tanks also allows the pilot to keep the plane more balanced. ---- My guess is that this difference is also reflected in how fighters and, cargo planes bombers are built. Fighters store most of their fuel in the body of the plane or in tanks close to the centerline. For them, the ability to maneuver quickly is a plus. On the other hand, cargo planes and bombers store fuel in their wings. That has the additional benefit of opening up space in the body for bombs for cargo. Mentor Pilot might want to look into a related question that has long intrigued me. Why do almost all commercial cargo and passenter planes have low wings while most military cargo planes have high wings? I can think of a number of reason for the latter, including greater inherent stability when doing tight maneuvers and placing the engines further from the ground so foreign material is less likely to get ingested taking off from crude runways. Is that why? I don't know.

This guy and team series is awesome. Well done all who produce these videos. I know a lot about aviation and now know more :-)

Been waiting for your video all day :D

It's clear you listened to the professors in uni. Makes me feel safer when flying!

Thats an awesome explanation, Nitrogen is an inert gas,filling inside the tank makes it fire safe & Also gives positive pressure for pump suction. i am a marine engineer onboard VLCC, we use spent flue gas from boiler uptake to fill the cargo tanks as inert gas to mitigate fire hazard.

How simple & clear explanation !

TANKS for all the info.

The most famous example of a commercial aircraft that DID use fuel to alter its centre of gravity is the Concorde; it had a tank at the extreme end of the aircraft as shifting the CoG was necessary as part of shifting between supersonic and subsonic flight.

Many thanks for a very complete and interesting explanation! Congrats from Brazil!

Thank you for a very informative session about fuel storage in the wings. One thing that came to mind was, by storing fuel in the wings we avoid any direct contact of fuel during landing or emergency landing as the landing gears prevent the wings from touching the runway thus avoiding any fire.

Fun Fact: The SR-71, when fully fueled would leak like a sieve. It was designed, when at extreme altitudes to then seal up the wing fuel panels from expansion/contraction. Reference: We had one stored in our hanger many, many years ago and talked to the pilots as the SR-71 leaked all over the hangar floor.

i love how KZfaq recommends videos i love to watch to me.

I sort of knew why this happened, but this video showed me even more reasons. Very informative!

I think that channel is excellent and the explanations you give are very informative, thanks

Thanks for the great video as always. Really enjoyed this one!

I am not technical in this field but the way you put it makes me understand, good job!!!

Thnkuu so much for the amazing info..I didn't knew this before.. just used to wonder all the time..👍 u r awesome.

Very interesting. I didn't know that fuel was stored on the wings. Thank you very much.

You have to indicate that this video refers to MODERN Commercial aircraft. Briefly & historically - fuel tanks were in engine nacelles e.g. WW1 - Gotha G4 & Vimy; and in fuselage e.g. Gotha G5; also in WW2 - Spitfire, Me-109; later fighters had Bladder tanks / bag tanks or fuel cells - reinforced rubberised bags were installed in sections of aircraft structure. Increased commercial flying (1930's onwards) required cabin space for passengers & cargo where the hollow structure of wings makes fuel storage an efficient use of space. Introduced in e.g. Douglas DC-1, DC-2, DC-3, Boeing 247, 307, Ju52 and post-WW2 designs; the "wet wing" - with Integral tanks in areas inside the aircraft structure, including the empennage (Tail-section) that have been sealed to allow fuel storage. The weight of the wing tanks and fuel counteract wing bending loads and locating fuel tanks in the wings also moves fuel further from passengers and crew in the event of a leak or explosion.

Having the fuel in the wings, above the engines, also allows the fuel to gravity feed the engines in case of pump failure.

Great video! Questions: 1) In the event of an AC power system failure, what power supply is used to run the AC driven pumps? 2) Is there a DC battery driven backup power supply (inverters) to bridge the gaps of AC power loss created by an unexpected AC power loss? 3)Does the APU have the capability to run off of the emergency back-up (inverted) DC power supply driving the pump for its fuel supply?

Great videos, really informative, No BS! Awesome 👏🏻 😎

Haha i don't knew that aircraft store fuel in wings ... Thanks for a little knowledge

I would like to see a video that explains the differences between the different types of approaches: Visual, ILS, GPS, etc. Also, what is your assessment of the "Next Gen" air traffic control (ATC) system and why is it taking so long to implement?

fantastic way to deliver speech. easy understanding. thank you very much.

Like your show.. I love planes. Been around them from a child. The knowledge you're giving i like sir. Thanks.

You are so cool and relaxed while you do your video...keep it up...and may god keep you safe...🤠

Great info,thks.

Wow! So many interesting information about aircraft! Thank you!!

Always something new and great to learn on this channel. Great work.

There's a common story of the WW2 bomber Consolidated B-24 Liberator; the design of the wings were so long and thin that aircrews mentioned that they bent into a Y shape with a full bomb load.

Very well explained with a lot of information... Thanks Metour Pilot, and please keep it up

Fantastic explanation of fuel system, well done

great ,thanks for your lovely information on the subject.

The extract of this story is, balance is the key for stability and things should be divided equally, while giving limited freedom, if stakes are, such as plane !

I liked ur channel Logo.. Thanks for the well explanation though

This was really good and very well explained. I really like how he emphasizes mathematics also. I'm always telling the youngsters the same. I wish math would have been more emphasized and had more prominence in my youth.

I used to refuel for USAir back in the late 1980s, mostly 737-200/300/400 as well as 727-200 and an occasional DC-9. Interesting to see that the fuel panel hasn't changed much since the 737-300/400 (the -200, both 737 and 727 were analog dials!). We used hydrant carts, which I don't see being used very often these days; mostly tanker trucks.

Furthermore, it also reduces the distance need to pump the fuel to the engines.

The part about the fuel cooling the fuel pumps reminds me of something I heard from auto mechanics about keeping the fuel level to at least a one quarter of a tank, especially during the summer months. That is, the gasoline in the fuel tank prevents the fuel pump from over heating, a problem leading to fuel pump failure.

Very interesting information as usual. Thanks very much for taking the time to do this videos.

I loved this video. Thank you so much. I learned so much today.

I’m a Fueler for DGS and I approve this message lol

i will like you to do a video on how the pilot manage to maintain the front tires to be exactly on the line during taxing on the apron to the runway vise versa

Wonderfully explained, as always! Bravo!

This is soo great! Thanks for explaining. Also the thing that made me feel most confident here is the nitrogen system. I was worried the tank would explode by some mysterious reason... You rock!

i didn´t know about the nitrogen system..thank you.

You semi-covered this: There is a great deal of stress at the point where the wings connect to the fuselage. Transferring weight from the fuselage into the wings relieves a lot of that stress. In the event of a fuel fire, having the fuel in the wings, rather than under the passengers adds a margin of safety. And, of course, Aircraft, like ships, like recreational vehicles... Everything has multiple uses, no wasted space... Empty wings are wasted space.

as up to my knowledge, spars are mainly used to add rigidity for countring torsion and bending moments whereas ribs are to maintain the aerofoil structure of the wing

when I took my first flight I was so Scarry because lack of knowledge about this its 21years ago so now I am flying every year 9hours up and down thank you for sharing your knowledge with others

I can hear Scott Manley screaming "center of mass should be forward of the center of lift! Lest it will be highly unstable!"

I did not know the SR71 used fuel for trimming also. Makes perfect sense. I knew the J7 fuel has a huge boiling/ignition point and is utilised as an airframe coolant due to surface friction at warp speed. I also thought baffling(steel wool) was used in all aircraft to stop sloshing. Good thing this educated gent knows his stuff lol

Very informative... I knew about the first two reasons, but the third was a real revelation. Thank you very much.

Brother thank you for educating us on airplanes keep up the good work

Suction of fuel in high altitude result reduction of pressure on (liquid) that reduces the boiling point to make liquid releases bubbles in a phenomenon so call (cavitation) which happens hydraulic systems

I did not know about the nitrogen generation system.

Very very good explanation... these kind of videos are what makes your channel SO GOOD....

Thank you for sharing!!! Great info!!!