Hello "Best Videos"! I just stumble upon your great youtube channel as I was doing some research for my upcoming technical video. I was wanting to ask you if I could use maybe 10-15 seconds from this video to explain the upcoming topic a little better :) It´s not for commercial use, only to educate younger aviation enthusiasts. I would obviously mention your channel in the description + link directly to your channel :) Looking forward to hear from you and thanks for your time :) Greetings Joe (youtube Channel: Captain Joe)
Such a thoughtful innovation, steering of main landing gear helps take much shorter turns on smaller taxiways and aprons. And really appreciate the kind of video shot with such close look. Main landing gear of 773er looks like monster from close-up.
I am pretty sure those main gear can turn tighter while moving. I have seen it many times watching them turn onto the runway before takeoff. It sure looked liked a tighter turn from where I was observing from. I am also pretty sure that the 777 was the first Boeing aircraft that had an APU powerful enough and smart enough to start both engines at the same time just by pressing a button. I do not know if that is still true with some of the newer models with more powerful engines but it was true for the original line aircraft. I saw a pilot do that once on a real commercial flight. The Simpson’s have an APU too. But they seem to be downsizing.
Is there any new technology applied to the main landing gears for after touchdown during crosswind landing? for some reason I believe I've read something like that somewhere that I can not really remember now helping reducing stress on landing gears during crab landing. Will appreciate your feedback
The aft wheels will turn up to about 6.5° degrees when the NLG is 13° or more, does this include with the bypass pin installed during pushback? Thanks!!
Is that thin cable with the green tape controlling the nose gear steering? I'm sure it's perfectly fine, but for a non-engineer like me it seems a bit precariously thin and prone to breakage.
That thin cable, plus another one just like it on the other side, their only tasks are to open and close the hydraulic valves for those two cylinders, and that doesn't require a lot of force, so are not prone to breakage. Those hydraulic cylinders are the ones that deliver the large force necessary to actually turn the nose gear.
It's all synced up through the gear tillers in the cockpit -- it works automatically. They do it to keep the main gear tires from scrubbing/squealing and improve handling precision in tight turns. It also helps keep the wheels from losing traction in turns where the airplane may simultaneously be braking on wet or slushy pavement.
Frantz J because on the 777 there are three pairs of wheel, the distance from the front tyre and the point of rotation ( the wheel leg) is further than on a 2 or single pair , is would lead to excessive wear when performing tight turns.
Jesus Christ. I probably understand you probably know nothing about aviation (no big deal). But really? You couldn't use simple deduction/critical thinking skills? What do turning/articulating wheels do on EVERYTHING that has wheels? It helps it turn! Seriously, some people need everything spoon fed to them...
Wow, that's not at all true lol the main trucks only deflect with sharp NWS inputs, which, btw, NWS (nose wheel steering) isn't used during landing/flare. That's what the rudder is for, it still has enough aerodynamic authority to keep the nose (yaw) of the aircraft under control through landing and flare. NWS isn't used until the aircraft is exiting the runway at lower speeds. Educate yourself, you tool lol
I know sometimes maintenance guys have to work on stuff to get it working right, but this kind of looks like dry steering. I suppose jacking up the nose isn't really an option....
XPoChangLinX It's not. Body gear steering is connected to the tillers only. Rudder movements provide a small amount of throw to the nose gear, but the main gear steering doesn't engage until the tiller is used in sharper turns.
XPoChangLinX And to go just a bit further, nose gear and body gear steering are disabled while the wheels are off the ground by a pressure switch in the gear. The nose gear steering will actuate on touchdown and the body gear will actuate once the steering has been commanded beyond 20 degrees either side of center.
Not sure what you are reading to get that information because it is not correct. FSX is a game right? The only time you might not want to turn the wheels is before actually taxiing the plane. The nose wheel turns to a very sharp angle. If you turn it to this sharp angle then try to taxi you will tear the nose tires off of the rims. There is no restriction or limitation in the Boeing Maintenance Manual for moving the gear steering system when the airplane is stationary. There is in fact a functional test of the steering system in the manual which is what was being done in this video.
Wow I didn't even know the main gear can steer too
yep,They steer.
Boeing 747's do the same thing
hk15 wow thats cool thanks for letting me know 👌🏼
OM%G Didn't either know the main gear could steer!!! Just like a big lorry! Thanks, Boeing, for impressing me! :D
hk15 yes it does i stumbled upon it wjen i was playing x plane 10 mobile with a 747
Same I had no idea they steered
Hello "Best Videos"!
I just stumble upon your great youtube channel as I was doing some research for my upcoming technical video.
I was wanting to ask you if I could use maybe 10-15 seconds from this video to explain the upcoming topic a little better :)
It´s not for commercial use, only to educate younger aviation enthusiasts. I would obviously mention your channel in the description + link directly to your channel :)
Looking forward to hear from you and thanks for your time :)
Greetings
Joe (youtube Channel: Captain Joe)
Captain Joe just do it ;)
lol i found you here when i want to see boeing steering system after your video:D
yes. Not sure where this comment went but have not seen it until now.
I made it here right after watching your video!
haha wasn't expecting joe to be here randomly
Main gear steering is necessary because of it's 3-axel design. It's only for tight turns during taxi and towing.
anyone else thinking thats one hell of a flat spot!
Such a thoughtful innovation, steering of main landing gear helps take much shorter turns on smaller taxiways and aprons. And really appreciate the kind of video shot with such close look. Main landing gear of 773er looks like monster from close-up.
Wow! Didn't know about the rear wheel steer!
In 2023 going back to this video to see how the main gear steering works. Thanks a lot by the video !
It's a really nice video showing how the steering works! Bravo! Thanks for sharing!
Great video! Useful to see the system in action up close!
That was really cool, I learned something new today so thanks for the high quality video!
I did maintenance for B777-200, the main gear doesnt hv steering capabilities
I am pretty sure those main gear can turn tighter while moving. I have seen it many times watching them turn onto the runway before takeoff. It sure looked liked a tighter turn from where I was observing from. I am also pretty sure that the 777 was the first Boeing aircraft that had an APU powerful enough and smart enough to start both engines at the same time just by pressing a button. I do not know if that is still true with some of the newer models with more powerful engines but it was true for the original line aircraft. I saw a pilot do that once on a real commercial flight. The Simpson’s have an APU too. But they seem to be downsizing.
It’s amazing how the tires can put up with any of this, including takeoff and landing. It all seems way too impossible for any tire to handle
Good video👍🏼
I had no clue mains steered
Good stuff :o)
Is there any new technology applied to the main landing gears for after touchdown during crosswind landing? for some reason I believe I've read something like that somewhere that I can not really remember now helping reducing stress on landing gears during crab landing. Will appreciate your feedback
The aft wheels will turn up to about 6.5° degrees when the NLG is 13° or more, does this include with the bypass pin installed during pushback? Thanks!!
Is that thin cable with the green tape controlling the nose gear steering? I'm sure it's perfectly fine, but for a non-engineer like me it seems a bit precariously thin and prone to breakage.
That thin cable, plus another one just like it on the other side, their only tasks are to open and close the hydraulic valves for those two cylinders, and that doesn't require a lot of force, so are not prone to breakage. Those hydraulic cylinders are the ones that deliver the large force necessary to actually turn the nose gear.
wow! how do they independently maneuver the main gears like that and for what reason? That was pretty cool though
It's all synced up through the gear tillers in the cockpit -- it works automatically. They do it to keep the main gear tires from scrubbing/squealing and improve handling precision in tight turns. It also helps keep the wheels from losing traction in turns where the airplane may simultaneously be braking on wet or slushy pavement.
lekoman Along with steering whilst the nose is up on landing to make proper centreline.
Frantz J because on the 777 there are three pairs of wheel, the distance from the front tyre and the point of rotation ( the wheel leg) is further than on a 2 or single pair , is would lead to excessive wear when performing tight turns.
Jesus Christ. I probably understand you probably know nothing about aviation (no big deal). But really? You couldn't use simple deduction/critical thinking skills? What do turning/articulating wheels do on EVERYTHING that has wheels? It helps it turn! Seriously, some people need everything spoon fed to them...
Wow, that's not at all true lol the main trucks only deflect with sharp NWS inputs, which, btw, NWS (nose wheel steering) isn't used during landing/flare. That's what the rudder is for, it still has enough aerodynamic authority to keep the nose (yaw) of the aircraft under control through landing and flare. NWS isn't used until the aircraft is exiting the runway at lower speeds. Educate yourself, you tool lol
I know sometimes maintenance guys have to work on stuff to get it working right, but this kind of looks like dry steering. I suppose jacking up the nose isn't really an option....
wow!
Can U do A320 steering?
Is the main gear in the 747 also steerable, and in the Airbus A380?
Steerable on 380
747 has independant body gear that countersteers for tight corners.
Does anybody know if the A380 have the main gear steering?
It does
Question!! Is the main gear steering used in landing while in crab?
XPoChangLinX It's not. Body gear steering is connected to the tillers only. Rudder movements provide a small amount of throw to the nose gear, but the main gear steering doesn't engage until the tiller is used in sharper turns.
XPoChangLinX And to go just a bit further, nose gear and body gear steering are disabled while the wheels are off the ground by a pressure switch in the gear. The nose gear steering will actuate on touchdown and the body gear will actuate once the steering has been commanded beyond 20 degrees either side of center.
And below a given speed as far as I know!
That's true too. Definitely wouldn't want to give that much steering authority while you're still rolling close to V1.
I love boeing
0:42That's awesome
😱
Hey! WTH!? I thought you're not supposed to steer the wheels of an aircraft when it's stationary? They even tell you this in fsx
Not sure what you are reading to get that information because it is not correct. FSX is a game right? The only time you might not want to turn the wheels is before actually taxiing the plane. The nose wheel turns to a very sharp angle. If you turn it to this sharp angle then try to taxi you will tear the nose tires off of the rims. There is no restriction or limitation in the Boeing Maintenance Manual for moving the gear steering system when the airplane is stationary. There is in fact a functional test of the steering system in the manual which is what was being done in this video.
who else came here cause of captain joe?
The funny is im a pilot well small aircraft pilot and i never know the main landing gear big aircraft can steer too hahaha
Is that some rinky dink bullshit cable?