Linked Questions
15 questions linked to/from How does the raked wingtip of the Boeing 787 work?
56
votes
5answers
12k views
Is a winglet better than an equal span extension?
Is there indisputable evidence that a winglet improves performance over an equal span extension? Please note: I am only interested in L/D improvements.
Winglets do improve roll performance, that is ...
38
votes
4answers
34k views
What do winglets do to increase aircraft performance?
It seems like a lot of the newer airliners have winglets or wing fences. How do they improve aircraft performance?
39
votes
3answers
10k views
How does an aircraft form wake turbulence?
This question discusses how wake turbulence can affect planes flying in formation. It got me wondering, how do aircraft (the wings in particular) form wake turbulence to begin with? It can't be as ...
22
votes
3answers
18k views
What dictates the aspect ratio of an aircraft's wing?
When designing an aircraft, there has to be a decision as to the aspect ratio of a wing. It's been said that having a higher aspect wing will reduce drag for the same wing area, however most of the ...
26
votes
3answers
3k views
Is wingtip design mature?
There are many wingtip design, all made to reduce vortex related drag, and neither boeing nor airbus seems to prefer one over another. They move from one design to another at each new aircraft, always ...
6
votes
4answers
1k views
Is there any benefit of using a swept wings at low-subsonic speeds?
Is there any benefit to using swept wings for speeds up to 250km/h ?
(By the way..Why do some fast birds like falcons, swifts and most migratory birds use swept wings or raked wingtips since they fly ...
-5
votes
2answers
21k views
Is there any difference between the Boeing 787 and the 737 MAX? [closed]
I've just done some research on the Boeing 787 and the 737. But the 787 and 737 MAX seem almost completely alike. Are there any differences between the 787 and the 737 MAX?
7
votes
5answers
707 views
How to recognize the horizontal winglet in the Horten design, or the experimental glider in this video?
Comments below the NASA Armstrong Flight Research Center video Proving Prandtl- With A Twist! incclude:
This video is entirely a hidden jewel in youtube, it deserves much more attention than what it ...
10
votes
1answer
2k views
Why are there different types of winglets? [duplicate]
If all winglets serve the same purpose (to reduce vortex drag), why do different aircraft have different winglets? This question is not trying to get a comparison of the development of winglets/...
4
votes
3answers
1k views
What kind of dihedral would be most stable?
What kind of dihedral would be most stable?
An airplane with wing span x ft and whose dihedral begins from the root(attachment point to the fuselage) of the wings and whose wing tips are y ft above ...
4
votes
2answers
843 views
What is the purpose of thinner airfoils used near wing tips?
I know that a thicker airfoil at root will strengthen the root spar but what is the reason behind using thinner airfoils at the tip?
Is it because thinner airfoils have higher stalling angles of ...
5
votes
1answer
1k views
Why is a wing tip's front edge tapered?
I am beginner and I want to understand the advantage of a tapered wing tip front edge beyond reducing the mass. How does this minimize or effect vortex drag, etc. Can someone help me to visualize this ...
2
votes
1answer
429 views
Why does the effective alpha/CL increase at wingtip of swept wing?
If anybody could explain this in an intuitive way I'd really appreciate it. I haven't been able to find a clear answer on this. I understand that the increase in effective AoA/CL and the spanwise flow ...
2
votes
1answer
142 views
What is the drag optimized wing form for given lift and bending moment?
I am trying to build a passive hydrofoil board.
Something like this:
I want to use wood and i am coming to the conclusion that i want to optimize drag for a given ...
1
vote
0answers
118 views
What are the benefits of raked wingtips over tapered wingtips? [duplicate]
This post shows the differences between winglets and raked wingtips. I'm curious why raked wingtips have been developed when there are tapered wingtips. What are the benefits of raked wingtips over ...