Boeing Transonic Truss Braced Wing Concept

RavenOne

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These ultra-thin folding wings measure more than half the length of a football field! Our new Transonic Truss-Braced Wing concept is revealed at #aiaaSciTech today. #TheFutureIsBuiltHere Read more: http://bit.ly/2VAnHks
 

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sublight is back

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They already fly at mach .80- so now they'll do it more efficiently at a higher altitude? I wonder if that will make the Q corner a lot more hairy.....
 

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Along with returning to the more market-friendly .80 mach, visually this is a lot less clunky looking which may help people buy-in. Interesting timing on this release too, wonder if they're closer to a real TTB product than previously indicated.
 

sienar

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Everything old is new again.
 

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litzj

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structural and L/D characteristics could be advantage

but aerodynamic stability can be issue.

still it is not as radical as box wing type
 

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Isn't the goal a better L/D ratio, the truss as a way to increase rigidity to allow that, and the technological advance to push the braced wing concept to higher speeds than previous proposals?
 

malipa

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The aerodynamic stability isn't actually more of an issue with this concept. It is really not that more different than a more standard design, when looking at the planform, and thus the aerodynamic stability is comparable. The problem is the aerodynamic interaction between the truss and the wing, possibly creating structural instability (created by buffeting for instance when at trans-sonic speed). And they want to have very long slim wings to dramatically increase the aspect ratio, decreasing the lift dependent drag component.
 

malipa

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The difference in offset between the truss and the main wing is rather small and both act pretty near the aerodynamic center and center of mass of the aircraft. That is not the case with the box wing structure, where the surfaces lay quite a part further away from the center of mass and aerodynamic center of the aircraft.
 

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sferrin

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Avimimus said:
Isn't the goal a better L/D ratio, the truss as a way to increase rigidity to allow that, and the technological advance to push the braced wing concept to higher speeds than previous proposals?

Isn't that basically what a diamond wing does? Why a truss over a diamond wing? Is one better than the other?
 

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litzj

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sferrin said:
Avimimus said:
Isn't the goal a better L/D ratio, the truss as a way to increase rigidity to allow that, and the technological advance to push the braced wing concept to higher speeds than previous proposals?

Isn't that basically what a diamond wing does? Why a truss over a diamond wing? Is one better than the other?

compared to pure diamond wing, it has less aerodynamic center change via flight condition change

and it can prevent downstream interference by positioning brace part under the main wing

for diamond wing, dowmstream part should be at the downstream of the front wing, and cannot be at the under side because of landing gear interference
 

bobbymike

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TomcatViP

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And by the way

 

Grey Havoc

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I'll just mention the current thread title in this post so people won't get too confused if and when the title changes.
Boeing Transonic Truss Braced Wing Concept
 

CJGibson

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HP design from the late 50s/early 60s.

Chris
 

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The Biden Administration seems to looking to fund a Truss-Braced Wing demonstrator as part of a push to get Boeing out from under the MAX shadow to an all-new 737 replacement.
 

totoro

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So instead of tariffs and sanctions imposed on the makers which use government aid/money to develop their products - is it then better to simply accept the game where every country tries to aid their manufacturers as much as it can and then those government aided products simply compete on an sort-of-even basis, without any of the tariff/sanction/ban nonsense? Will such a global system REALLY take off? And would it finally mean the end of endless airbus/boeing accusations of who got more government aid?
 

TomcatViP

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It would be a disaster for the industry: from performance based innovation to PR and cronyism.
If you are not convinced, see what's happening in the e-Vtol market; or more bluntly to a vast majority of non-sensical European subsidized aerospace projects.

I get it, it's time for recovery but...
 
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Foo Fighter

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I'm sorry to say this as it is counterintuitive but, we NEED to get jobs sorted FIRST. Each and every job saved is a family less on the skip. Let's get this over with and then we can worry about subsidies.
 

red admiral

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Interesting that only a few years ago NASA was very much going down the D8 route for the next X plane
 

aonestudio

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View: https://www.youtube.com/watch?v=NtQHjBinQQs

NASA’s Aerosciences Evaluation and Test Capabilities Portfolio (AETC) is helping to enable the next generation of transport aircraft technology with testing of the Transonic Truss-Braced Wing. Testing has been conducted in three of NASA’s wind tunnel facilities so far and includes assessing take off and landing configurations, ground effects and aerodynamic characteristics.
 

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