Linked Questions

24 votes
4 answers
17k views

How does a flying wing keep from going into a flat spin when maneuvering?

How do flying wings, like the B-2 Stealth bomber, actually keep themselves from yawing out of control without a vertical stabilizer? For the record, I assume this has to be a simple mechanics process....
Jae Carr's user avatar
  • 24.2k
37 votes
2 answers
9k views

Why do aircraft need a vertical tailfin, but birds don't? (and lots of fish do?)

I don't know of any bird that has a vertical tailfin, but apparently aircraft need them for lateral stability. Why is this? I did realize, however, that most fish have a vertical tailfin, or a ...
DrZ214's user avatar
  • 17.8k
13 votes
2 answers
32k views

How does the raked wingtip of the Boeing 787 work?

The wing tips are very different on these airplanes. The wingtip on a Boeing 787 is a sharp triangle, while the wingtip on a Boeing 737-300 is flat. British Airways Boeing 787-8 G-ZBJC wingtip | by ...
Ethan's user avatar
  • 9,349
14 votes
3 answers
52k views

How does wing sweep increase aircraft stability?

I was told at one point that the sweep of a wing can help with the straight line stability of the craft, in fact I think it's one of the main systems that keeps flying wings flying straight (like the ...
Jae Carr's user avatar
  • 24.2k
19 votes
2 answers
2k views

What is the purpose of these odd "control surfaces" on the BAE Taranis?

I was looking at a video of the BAE Taranis, and noticed these weird control surfaces: There is a matching pair on the underside. They don't seem to move at all throughout the video, even on landing, ...
0xDBFB7's user avatar
  • 322
13 votes
2 answers
74k views

What are the advantages and disadvantages of a delta wing compared to a swept wing?

What advantage does a delta wing have over a swept wing with high AR for supersonic flight? And what disadvantage does a delta wing have over a swept wing with high AR for transonic flight? The ...
tzy's user avatar
  • 283
12 votes
2 answers
6k views

How is the induced drag calculated for a wing with elliptical planform?

How is the induced drag calculated for a wing with elliptical planform ? Is this wing shape the most efficient ?
Earl Quandt's user avatar
7 votes
3 answers
3k views

Is induced drag caused because of the tilt of the wing backwards?

In this question: Why is induced drag less on a high span wing? In the answer it was stated that wing tip vortices do not cause induced drag. If this is the case then what causes the induced drag. ...
Crafterguy's user avatar
5 votes
2 answers
2k views

Why isn't the bell distribution used?

Why has the bell distribution not become widely used? Is the bell distribution only ideal in inviscid flow scenarios or is there another reason for the lack of use?
user38891's user avatar
5 votes
1 answer
2k views

What is the need for twist along a wing?

Why should a wing even have a twist towards its outermost chord? How did that even come about? Why can't it be straight and aligned as it usually is?
Tobechi Nosiri's user avatar
3 votes
3 answers
1k views

Does the Prandtl flying wing have a lower maximum speed than other designs?

Does the design of the wing with its "twist" near the wingtips necessarily limit the maximum speed of an aircraft utilising that technology? Also, with the leading edge profile/attack angle varying ...
gregor kropotkin's user avatar
1 vote
1 answer
1k views

Do wingtip vortices cause a decrease in the lift component of aerodynamic force, and do planes need to pull more AoA to compensate?

So, from what I know about wingtip vortices, they shift the angle of the relative airflow to where the effective angle of attack of the airfoil is lowered. Since the aerodynamic force is always ...
Vinicius Quintela's user avatar
1 vote
2 answers
259 views

Could reduced-lift wingtips allow an airplane to generate less wake turbulence?

Would it be possible to weaken the wake vortices generated by a large aircraft (which can be dangerous to smaller aircraft behind the large aircraft, and are the limiting factor determining how ...
Vikki's user avatar
  • 28.4k
0 votes
1 answer
123 views

wingtip vortex in negative angle of attack

If a wing is at a positive angle of attack, then the vortices produced at the wingtip will generate downwash and induced drag but on the contrary, if the wing is at a negative angle of attack, then ...
alireza's user avatar
  • 109