Peeking over there in Civ Av, I read that the new 737 MAX 10 is supposed to use a levered landing gear. How does it work? Is there supposed to be a "knee" in the MLG, so the legs can extend a bit farther?
David
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Re: 737 MAX 10 and its levered landing gear
[quote="flyingturtle"]Peeking over there in Civ Av, I read that the new 737 MAX 10 is supposed to use a levered landing gear. How does it work? Is there supposed to be a "knee" in the MLG, so the legs can extend a bit farther?
David, there's not yet any official artist rendering from Boeing, but general consensus here seems to point at an Embraer's E2 family MLG analog. Or for the sake of better comparison and in reference to my name, the mighty Dassault Mercure MLG
David, there's not yet any official artist rendering from Boeing, but general consensus here seems to point at an Embraer's E2 family MLG analog. Or for the sake of better comparison and in reference to my name, the mighty Dassault Mercure MLG
Re: 737 MAX 10 and its levered landing gear
Check out the 40 sec mark in this video, and again a 1:14. It has a very slightly levered gear. The center of the wheels don't line up completely with the leg:
https://www.youtube.com/watch?v=CXpBX1Gp9p8
https://www.youtube.com/watch?v=CXpBX1Gp9p8
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- speedbored
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Re: 737 MAX 10 and its levered landing gear
flyingturtle wrote:Peeking over there in Civ Av, I read that the new 737 MAX 10 is supposed to use a levered landing gear. How does it work? Is there supposed to be a "knee" in the MLG, so the legs can extend a bit farther?
Do a google search for "trailing link landing gear" and you'll find lots of information about the sort of thing Boeing are planning to do.
The primary reason that Boeing are planning to use this sort of landing gear, I believe, is to shift the rotation point slightly rearwards, in order to allow a slightly higher rotation angle than would otherwise be possible with the increased fuselage length.
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- flyingturtle
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Re: 737 MAX 10 and its levered landing gear
speedbored wrote:Do a google search for "trailing link landing gear" and you'll find lots of information about the sort of thing Boeing are planning to do.
Thank you. Now, I understand.
I suspected that they needed a solution to their long-standing "How can we stretch the 737 but without redesigning too much of that damn thing?" problem.
David
Re: 737 MAX 10 and its levered landing gear
I wonder if this design could be back-ported to the -9 and -8, it would improve their field performance as well, depending on if it weighs much more.
Re: 737 MAX 10 and its levered landing gear
Stitch wrote:Boeing shows some videos at PAS:
https://twitter.com/thatjohn/status/877101578888589313
https://twitter.com/jonostrower/status/ ... 9319045121
Thanks for sharing. The Concorde had something similar:
"The combined length of both undercarriages is greater than the distance between both undercarriage roots. This problem required that the undercarriage be first retracted vertically and then swung inwards to be tucked in the wing and fuselage belly".
http://www.heritageconcorde.com/mainlandinggear
Obviously not a trailing link landing gear.
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- Starlionblue
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Re: 737 MAX 10 and its levered landing gear
ro1960 wrote:Stitch wrote:Boeing shows some videos at PAS:
https://twitter.com/thatjohn/status/877101578888589313
https://twitter.com/jonostrower/status/ ... 9319045121
Thanks for sharing. The Concorde had something similar:
"The combined length of both undercarriages is greater than the distance between both undercarriage roots. This problem required that the undercarriage be first retracted vertically and then swung inwards to be tucked in the wing and fuselage belly".
http://www.heritageconcorde.com/mainlandinggear
Obviously not a trailing link landing gear.
The 330/340 does a same thing. The main gear shortens during retraction to fit in the bay.
Re: 737 MAX 10 and its levered landing gear
Starlionblue wrote:
The 330/340 does a same thing. The main gear shortens during retraction to fit in the bay.
Thanks for the info, I didn't know that. Visible here:
https://www.youtube.com/watch?v=15z48XuoJfE
Was it an also the case on the A300/310 from which the A330/340 are derived?
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- Tristarsteve
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Re: 737 MAX 10 and its levered landing gear
And it also goes further back the the De Havilland Trident 121. The MLG not only shortened, it rotated 90 degrees on retraction to fit into the bay. Must have been the same guys at Dowty that designed the A300/ A330 legs.
Re: 737 MAX 10 and its levered landing gear
So it is not really levered at all, semi or otherwise. It is just telescopic.
Re: 737 MAX 10 and its levered landing gear
77west wrote:So it is not really levered at all, semi or otherwise. It is just telescopic.
You might be right. We've been using "levered" but it seems like the correct word is "telescopic".
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- speedbored
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Re: 737 MAX 10 and its levered landing gear
77west wrote:So it is not really levered at all, semi or otherwise. It is just telescopic.
I believe it is both.
Telescoping to fit the wheel well and levered to move the rotation point rearwards.
Re: 737 MAX 10 and its levered landing gear
speedbored wrote:77west wrote:So it is not really levered at all, semi or otherwise. It is just telescopic.
I believe it is both.
Telescoping to fit the wheel well and levered to move the rotation point rearwards.
On a single axle gear, in order to "lever" they would have to have the axle offset from the centreline of the strut, I could not see that in the video but then again there was no axle or wheel on it.
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