BODY GEAR STEERING on the Boeing 747 / Explained by CAPTAIN JOE
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- Опубликовано: 4 окт 2024
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Dear friends and followers welcome back to my channel and to a great video about the BODY GEAR STEERING of the Boeing 747.
So as we look at the 747-400 you can see that she is one very long airplane, 70,7 meters in length and 64.9 meters of wingspan, not to mention her younger and even longer sister the 747-8, but I´ll come back to her in a minute.
A problem the 747 is facing from time to time, at given airports, is not just the length and wingspan but her turning radius and width needed to perform a 180-degree turn.
The landing gear of the 747 consists of four main landing gear assemblies, the wing gear, which is mounted in the wing root on either side and the body gear mounted in the belly/fuselage.
If we look closely at the body gear you can see those two actuators, those are the body gear steering actuators which can rotate the entire truck by 13 degrees to either side.
Now the body gear is electrically linked to the nosewheel steering, meaning if either pilot moves the nosewheel tiller, to steer the plane along a taxiway, as soon as the nosewheel is deflected more than 20 degrees, let´s say to the left, the body gear steering comes active and each body gear truck rotates in the opposite direction, as the respective actuator, in this case, the right one, forces the forward part of the truck to the right and aft to the left. And obviously into the other direction placing the tiller to the right.
Interesting to know, the system hydraulically centres the body gear and deactivates the system if the ground speed increases beyond 20 knots, and comes active again when the speed decrease through 15 knots. Besides that, the rudder pedals which are also connected to the nosewheel steering, won´t activate the body gear steering at any time, as you can only deflect the nose wheel by 7 degrees to either side not reaching the activation of 20 degrees like the tiller.
But so more within the video!
Thank you very much for your time! I hope you enjoy this video!
Wishing you all the best!
Your "Captain" Joe
Big thank you to all other youtubers who provided me with the video material to create this video. Your content is highly appreciated. Please follow their channels:
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1:42 The little airplane in front of the huge "Queen"... Too cute :3
Looks like a cat
Yes! I noticed that too! 😃
I came down to the comments to see if anyone said anything about that
Yeah it's an impressive shot. And then you realize that the wake turbulence when these "small" planes take off after a super/heavy is something to be serious about. You can find the full video here: ruclips.net/video/gXPUXOl0qQ0/видео.html with the Cesna vs 747 :)
Yes was a very funby scenen
Sorry guys, the CAT 988F is not a bulldozer but a wheel loader😉You see I know more about planes than bull/dozer/loaders😉 by the way if any of you guys has one of those, I would looove to take that out for a spin😉
The simple rule is if it has wheels, it's not a bulldozer. Bulldozers have tracks. (Well, there are several wheels inside the tracks but I think you get the point.)
well yes and no. 0:09 that is a wheeled bulldozer 3:58 that is a wheel loader. 0:09 its more or less a wheel loader with a bulldozer blade there are many hybrids like this e.g. JCB Teleskid its a skid-steer with a telehandler boom www.jcb.com/en-us/products/teleskid
nvm
you're a pilot
not a tractor driver
Captain Joe they’re all considered bulldozers to me
Hehehe I used to build them 936 938
You’re so positive, inspiring, and supportive Captain Joe,
I learn more about aviation from you, but the most important for me is to learn from your positive attitude.
Thanks a lot!
Sami abdulreheem Means a lot, thank you
The best steering system I know with my glider is step out of cockpit, grab the end of the wing and rotate entire plane 😂😂😂
I like that. :-)
Turning radius : 0m. Probleme solved 😂
Then you rip the wing from the airplane, RIP wing
Ah the superior steering mechanism
😂
I am a truck driver in the US, I lovedtthat clip of the truck turning. I see that happen all the time. LOL
As a pedestrian in an area with regular weekday 18 wheeler traffic making store deliveries, when they make a 90 degree turn, I instinctively move the hell back from the curb, just in case. Unlike some of these zombies, when I'm in public, I actually pay attention to my surroundings and to traffic flow---without earbuds, bluetooth or my face in a phone.
Excellent. I knew about the 777 body gear steering, but surprisingly I didn't know that about the 747.
As always, very well explained Capt. Joe !
Chad Watson It now makes sense why the Boeing 777 and the rest of the big aircrafts in the world can do a 180 degree turn so easily in almost the exact spot it’s in.☺️
@Lancashirelad Captain Joe was probably talking in tonnes (metric tons). (British tons are almost the same).
The C5 Galaxy originally had a dual system installed. It had the ability to steer all the Main Landing Gear (MLG). On approach, all MLG would align with the runway and allow the plane to land with a crosswind. It was called Crosswind Crab. Then once on the ground the aft gear would caster to allow sharper turns then hydraulically power back to center. This was called Caster Power Back system. The crosswind crab was removed but the Caster Power Back system was retained.
Great insights! Thank you very much!
@@flywithcaptainjoe B52 also
Now i've got to go look up videos on these... sounds really cool!
Great info Allen. Can you answer a question for me? Is it true the C5 Galaxy has the ability to inflate/deflate its tires to land on different runway surfaces like the Lockheed C130 has? (dirt, gravel, snow, tarmac runways ect) I am not talking about the landing gear kneeling system for loading and unloading...but the tire deflation system itself. Thanks in advance.
Very interesting. Didnt know about it. Thanks
Love these videos!!
Hearing Kennedy Steve in the intro always brings a smile to the face!!
Boeing... how wide are most runways?
Airports... 45m's wide...
Boeing... ok we will made the minimum turning radius 46ms
Steven Larratt then there is the 7.5m shoulder extension on both sides.
Boeing : what do people look for in a plane?
People : it should fly, for starters.
Boeing : nonsense. Check out our new 737 Max 8!
@@hugolafhugolaf That is dark
Boeing: we made a new plane
Runway: I’m gonna ruin this man’s career
What would be the point of 45m? Without any margin for errors, it wouldn't be of any practical use. You still won't use a 45m runway to turn.
Great video I was honored to be part of the maintenance crew on the AIRBORNE LASER which was a 747-400 for 10 yrs it was a dream being able to work on the queen of the sky. That body gear steering was a great help when towing this beast I couldn’t imagine not having that, scrubbing tire wear would create a great expenditure on carriers and also cause great tension loads on the gear.
You should have mentioned the B-52. The B-52 can takeoff and land in a crab because all the wheels pivot.
It will be the year 2142 and those 52's will still flying.
@@PointReflex fine by me. Incredible looking plane
Beat me to it. Think the large Antonov can do it too and the C5
@@3d1e00 I once saw a static display at a facility where they refurbish the C-5's landing gear. Each landing gear assembly of a C-5 Galaxy costs $650,000
@@timothycook2917 Sounds like Porsche must have been the suspension contractor.
Good point on the 747 prototype. Yet another example of what an amazing plane that was and why it completely dominated air travel for so long.
There's a great documentary on the design and development of the 747, which is a real eye-opener in so many ways.
Steeltrap Would you know the name of that documentary?
@@flywithcaptainjoe
Hi Joe, here's a shorter version: ruclips.net/video/4Ht1ogFUBLc/видео.html
The original is, I think, this: www.imdb.com/title/tt4030188/
I like how they signed the contract to start delivering them in 28 months and yet Boeing hadn't started designing them, lol. Just one of the remarkable bits of the story of how it came about.
Cheers
I used to work with someone who was a B-52 pilot during the Vietnam War. The B-52 was also made by Boeing, so they had a lot of experience with these things. The B-52's main landing gear was steerable and didn't have a nose gear. When doing a crosswind landing, the nose of the plane would be yawed into the wind while the main landing gear would be lined up with the runway.
Joe, this is a cool video. Talked to my father in law who is an old B52 pilot with 5000hrs + flown for SAC and in Vietnam (also flew the B58 Hustler). They had a knob in the cockpit where they adjusted for crabbing before landing. By rotating the knob it showed them the crabbing angle (ground moving along compared to lines in the instrument) and it adjusted the MLG automatically. Ones the Buff has touched down they simply rotated the knob back to neutral and the landing gear moved back to its position. Not used on take off though.
Love your videos Joe!❤️ You are a huge influencer for me, thank you!👍🏻 Keep it up
so true!
Thanks😉
Dont you mean infuence?
Agreed
I love the custom livery you have, and the consistency of your brand.
Edward Cameron thank you Edward! That means a lot👍🏼
I think the steering system of the B52 bomber is pretty cool in all its weirdness.
The gear Retraction/Deploy is even stranger
1 of the best videos you made. As a former bus/truck driver I know all about counter steering. On the MCI buses they also had a manual shut off switch and the system was automatically deactivated at speeds above 30 mph. I'm not sure the counter steer ratio but it was cool to take on a tight corner with it.
As always great content!
A good pilot is always learning!
If Captain Joe was my instructor I could be flying a 747 with my ppl....best explaining skills ever. Online waiting for the next video.
*You are simply the best, Captain Joe*
Better than all the rest.
Thank you very much!
some information to the 777:
The main gear steering activates as soon as the nose landing gear is deflected at least 13°. A transmitter on the left hand tiller picks up the nose landing gear steering angle. The aft axle can deflect up to 8° (6.5° on the 777-300) when the nose landing gear is rotated more than 70°. when the NLG steering input is
64h5dsf14j6s41h5s4j5 Thank you very much😌
For other great steering techniques on planes, I would definitely suggest the Antonov AN-225 as well. It has 32 wheels of which 20 are steerable. 4 in the front (two sets of 2 wheels) and 16 for body steering (4 sets of 2 wheels on either side). Which definitely is necessary to taxi this giant bird.
0:36 Always this smile and little giggle before your _'Let's get started!'_ ... That's a contagious smile, Captain. Makes me smile as well everytime I see it. You can't see me, but take me at my word. ;) Make a t-shirt of it, should sell like hot cakes.
Or better still: a morning coffee mug with it on it for morning grouches and more positivity :))
Awesome video as always, just got my private license today!
bignitro50 congrats!!
Happy flights
Congratulations! 🛩👨✈️
Congrats !!
Congrats here
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Great video. I am fascinated with aviation and know a fair amount about aircraft, but I had no Idea about body gear steering on the heavies. I enjoy your videos very much. Thanks from a non-pilot, non-flight simmer.
Connor K Does are the best comments, if my videos surprise others about technical facts on planes, I‘ve done my job right😉
+Captain Joe, I am a retired industrial engineer, who, for 18 years, supported avionics for three airframes within the Boeing product line. Please, take us on a tour of the "Hellhole" sometime. Should Cargolux have any old 'farts' like me still around, ask them about the origins of the 747's "Cargo Compartment Temperature Indicator", (mid-1990's), and the "flatulent pigs"....
AMStationEngineer I will do my best😉
Many thanks, it's a story I'm certain you will enjoy!
These are stories I've got to hear!
Is the flatulent pigs the story the one with the pigs that flew out of LHR in the cargo hold of a passenger 747 in the 90's. They got scared and started farting. The stinky gas set off the fire alarms (without a fire starting) and they returned. I think the pigs were being used for breeding or something in the story I am thinking of. So they sent them by plane to South Africa if I remember it right.
+John B, and the "Smiths Aerospace - Malvern" 2262-01-2 CCTI (Cargo Compartment Temperature Indicator, adorned in wonderful BAC-8328 F "Boeing Baby___t Brown" ) was born! AKA "Stinky Pig Indicator". You win the prize on that one. I cut the 'BAC generated' supportive documentation for that very FAA-TSO Order, and the FAA-PMA . Give that man a cigar!
Those porker's were worth beau·coup bucks, and there were several engineers (from both companies, and two airlines) who received T-Shirts with dancing pigs captioned with - "PULL MY FINGER". I actually believe that the re-insurer was involved in procuring those t-shirts. I couldn't have told it better myself!
It was theorized that 'a unique' phosphate chain may have been a (dietarily produced)sub-component of the 'little atoms of p**p' in the air that day. I do know, that after that event, virtually everything farm or zoo related, was provided with at least minor sedation prior to their flight. I would have loved to have seen the 'treatment' that Benny Hill would have provided on his show...
The thing you call a wheeled bulldozer is actually called a wheel loader. Love your channel! Best regards / Offended technical trainer in construction equipment :D
Max Häggberg you got it Max, not my field of expertise😉
Agreed, in my world we call them loading shovels Rgds
Haven't watched it yet but I'm sure this is going to be amazing as always.
Thanks capt!
I swear ur the best pilot I've seen in my life.... U explain good and u are the only pilot that I understand from.... Ur the best. Legend !!!!!!
Interesting, informative and entertaining as always, Joe.
Many lorries in the uk do this now. Even little urban trailers. I was following an impressive abnormal load a few weeks ago which had about 8 rear axles, every axle steered! Impressive to watch!
Great videos and really helpful! I want to be a pilot to after watching your videos!
Joe I love watching your videos, thank you for making them. I'm not even a pilot - it's just awesome watching well made videos about "random" subjects
Amazing! Love your videos cap'n Joe!
Capt. Joe...thanks for always steering us in the right direction with informative and entertaining videos. They help us to not spin in circles.
I had a Honda Prelude with four wheel steering back in the early 90's. It was excellent for turning and parking , don't know why you never see four wheel steering cars anymore.
The extra cost to design, manufacture, and maintain a four-wheel steering system far exceeds any benefit gained vs a front-wheel steering system in normal driving situations. Four-wheel steering only makes sense on large vehicles confined to work in tight spaces.
This is Gold Captain Joe!! Amazing explanation about the Boeing 747 daily operation..!
Oh, so it's kinda like the B-52 bomber where it can steer all of its wheels in the same direction. But that feature is for compensating for cross wind during landing. But I won't be surprised if the rear gears can steer in the opposite direction from the front wheels during taxing.
I love that KOREAN AIR B747 on the Thumbnail!
Could you make a specific video on 747 like you did for the a320
The B52 would be a great follow up to this steering video. The amount of stress on that nose wheel on the 747 must be huge! Great video :-)
Amazing video, 748 is really impressive, but what I Loved most in this video is the A380 at the end 😊😂 I mean, did you see how nice and clean this landing gear was compare to the wrinkly 747 landing gear 😁. Joke aside,well done Joe, your video is impressive, definitely can’t add a word to it, keep it up 👍🏻
A380 suck along with all airbus
@@jgabb1967 if it's boeing im not going...
@@jgabb1967 Boeing is boring even the name is similar how about that?
@Alexander Sigurvinsson It ain't Boeing it ain't boring
@@washx2k755 at least they don't fry their planes with joysticks! HA
Another superb video cpt Joe! I did not know about the body gear steering until now! I
Airbus A350 is May fave ❤️
For me its An-72
Excellent and a very informative presentation. Thank you Captain Joe.
Nice video as usual ! Pilot is my dream job and you're a great inspiration for me ;)
Joe, you have made my day. I love your videos. Nothing to hate but way more to love. Thanks for everything Joe
You should do a video on pushbacks😀
I absolutely love your videos Capt. Joe! I. Not exactly an aviation enthusiast but I do love to learn, and your teaching skills are pristine! Not to forget your English is better than most Americans that have spoken English their entire lives.
The same steering system applies to the new Audi A8. That's quite a long one too😂
Several different cars have that including Posches. At high speed turns the rear wheels steer the same direction as the front to negate oversteer. It is only about 3 degrees of wheel steer.
4ws system was applied to a Honda Prelude 30 years ago..actually it’s more old than that in automobile history..
Captain Joe is a good -better-best teacher for flight enthusiasts like me.
999th like! You are so honest and lovely, thanks Joe ❤
This is my first youtube vedio which i watched with 4k quality.....Love you Captain...
An 125/ An 225 steering in very interesting
Yes
Indeed
Can you link some videos or pages, where explained?
124
I love how on 1:39 there's a sudden "OH" moment of realizing the size of the 747.
Can you do a video about how air conditioning systems in aircraft work?
Another awesome video. Keeping level high.
Is body gear steer available for crosswind landing? A video that has been around for a long time shows Boeing Xwind landing tests at some Airport in South America. That video seems to show the body gear twisted on some of the aircraft
Much respect captain I learn so much from your videos, very inspiring to me.
Captain Joe, how often do they change the tires on the landing gear on airplanes?
yeah what if the tires of the plane I'm being carried in are kinda broken,
@@TheEsdaniel Bring a parachute.
Depending on the Operators specifications, it is usually measured by the amount of the centre tyre groove still visible and could be around 180 landings per tyre.
@@tedsmith6137 So they do not use an instrument made for plane tires like a penny on the tread of my tire on my car. If Lincoln's head is covered it is good. If not then it is time to change it. I thought they would have tire gauges that measured the tread. You want good tread on the tires that are on a wet surface trying to land.
Usually depends on wear and tear
7:19 I must say that 747 looks beautiful without the passenger windows
Another Dope Video! 🔥🔥🔥 Watching your videos keeps motivating me as I’m going to flight school. Watch how I apply some of your principles I learn here on my channel as I’m getting my commercial certificate now.
Thanks
Keep It Going !!!
That is 1 sick little turning system the 747 has.i generally didn't know about that .nice 1 Joe for this video ..
J.B. HUNT truck crash - Just Been Hired, Unfortunately Not Trained.
point taken, but if you look close you'll see it's not a JBH truck pulling that trailer but a yard spotter truck
@@timothycook2917 That would actually be even worse since a lot of yards involve maneuvering around corners, and they're generally just grabbing trailers and moving them around. That said, I do notice most of them are moving at a rather rapid pace.
It's always nice to hear Kennedy Steve's voice!
make a vid on flying at night
Never skipping your ads...keep up great content!
Can you do a video about plane tyre blowout
i saw a vid on jet blue
Fascinating video, Captain, and thank-you for sharing it with us. Having read through the comments and sadly noting how much of my thunder had been stolen (JUST KIDDING), one notable aspect of steerable body gear is how much torque and other lateral forces are eliminated from the struts, linkage, and other components of the main landing gear system during ground maneuvers. Given the 747-400 has a MTOW of about 450 tons (US), without the steerable body gear, the entire system would have had to been engineered much more robustly. Not only would this have added weight, but it would have eliminated space that is currently occupied by other critical components. Again, thank-you for your post, and I am looking forward to viewing your next lesson!
Hi Joe ,
747 made its first flight fifty years ago Today. ( 9//2/69)
Best regards
Another great video!!
Just curious... where are you from? Can’t quite pick up your accent
Great content as usual joe, keep up the good work!!👍🏻
From Capt. Joe's "Importance of English in Aviation" video, he mentioned childhood roadtrips to England and that he "natively" spoke German. He might work for CargoLux based on his "747 vs a380" video. Thus, Joe may be from Luxembourg, which has German as an official language and proximity to the Chunnel.
Think he is British but raised in Germany
He is German but he has British heritage
Hi Joe ,Great video, I worked as an aircraft engineer on the 747-400 and the 777.
Hello captain joe, I remember one of your videos you said ‘how did I pay for flight school and how can you stay tuned.’ Are you still going to make this video?
Mohammad Alizadeh yes still coming up
A good lesson, thanx Captain Joe
so joe, when will you become a captain and gain your fourth stripe? is it based on your flight hours, or seniority with the airline?
I believe it's a combination of both. However, do recall Joe switched airlines recently so it may yet take a while. I don't think he's hung up on it. Seems to me he's living his best life flying the 747.
It’s going to be many more years, due to the airline change😌
Captain Joe ah well, those years will ‘fly’ by when piloting a ‘joembo’ jet. sorry for the cringe i had to that.
@@flywithcaptainjoehi Joe have changed Airbus to Boeing . I was not watching videos for a long time due to some preoccupancy..just wondering is it possible to change from Airbus series pilot to Boeing series pilot without changing the rank ...
@@cmntkxp Rank is only with a single company. Every company is different, one may start in a new company as a captain with good experience, others may start as first officer and promote after a short time.
Very cool video Joe! I didn’t realize how big the turning radius was, makes my 85’ turning radius look like child’s play lol.
So can you do a donut with a 747-400?
Apparently, not on purpose!
@@donaldstanfield8862 i just want to imagine captain Joe drifting with a 747-400 across the tarmac. I know it would be ridiculous to do, but i can dream.
@@sirBrouwer *triggered you said tarmac not runway*
@@diegoandalexcockatiel7540 why? If i said runway that would exclude everything that is not the runway it self. I want Joe to drift the entire airfield. Runways, taxi lanes and all. You need a lot of space to drift with a 747.
@@sirBrouwer i just said it as a joke btw
Cpt Joe; your videos are the best on RUclips. It is not just a video, it is a class about airplanes .
I am an airplane enthusiast and love to know as many as possible all the engineering behind this fantastic machine .
This video is extremely interesting, especially you added a lot of details on it.
You post this video 02/07 and in the same day you already had 40435 views. It is fantastic.
Thanks for sharing your knowledge.
Is that your real uniform or is it a costume you use for videos?
Reall
That was some cool stuff about steering..nice 2 know..n thanks for d detailed explanation
One day I am going to become a pilot😎😎
me 2
What Plane
Good luck :)
I already am....
Of a pocket drone 😎
lukas games thanks😎
See captin Joe this is why Boeing always stays my favorite!! Almost all the innovations came from Boeing.
6 people were "first"
Yeah, sure u were ^^
Darius Israel Lanrue first
hehe
Darius Israel Lanrue I’m amazed people actually care that they are first comment on a video. Who cares.
Oliver160 Dr Games that’s because it didn’t refresh dinglenut
Darius Israel Lanrue I’m sure they’re just commenting on their sex lives - being first is not always good.
I love B747 and your vídeos, thanks CJ, best regards ✈👍
Why is he always holding his hands like Angela Merkel
What's wrong with you Germans??? 🤣 😂😅
FridgeBiTeR _CB Funny enough I don’t even realize that I do that until I start editing the video😂
Genocidal guilt
@@flywithcaptainjoe heyy Joey boy 747s 50 bday.... R u having a party? 😂😂🤣
@@flywithcaptainjoe you do this in any video
The Lockheed C-5 Galaxy has rear body gear steering as well. great videos as always.
Marry me please
?
Simply yes
Good video Joe, you could become a freelance technical teacher 👨🏫. This was a accurate explanation of the body gear steering system from a B747 . Weiter so !
Incredible and yet simple solution.
I love these types of videos very entertaining and informative!
Very well explained Captain Joe
Awesome video. Also, the B-52 Stratofortress utilizes body hear steering as well.
Wow, that’s serious engineering by Joe Sutter, invented before we were born & the same principle is still applied to heavy and super-heavy aircraft today. 👍💯
I very much enjoy your videos, given that I was involved in aerospace for over 50 years -- I even worked on the first 747's APU electronics back in '68. It sounds like you've transitioned from Airbus 319/20/21 to B747. Wow, what a step up. I love that big old airplane and have flown hundreds of thousands of miles in them, mostly between the U.S. West coast and Taiwan. There is no better big commercial airplane, but ETOPS has pretty well killed the 4-engine ships. That said, the 747 can be easily converted to a freighter (as you well know), and the A380 cannot. I don't think there will be any 30 year old 380s, unlike the 747. Congratulations, and thanks again!
You are the best Joe!!!. Even if I am not a pilot but still I am always learning 😉.. Good job 👍
MCI bus has a similar rear steering system, when making a turn under 15 mph the rear wheels track in the opposite direction to help bring the back of the bus around in a turn.
Great video! Didn't know about the main gear steering. Keep it up Joe! Danke Schön.
Thanks Captain Joe!, Great Video !. I'm NOT a Pilot, but , these Video's are interesting.