Linked Questions

56 votes
3 answers
57k views

What's the advantage of the F4U Corsair's gull wing design?

What is the advantage of the F4U Corsair's gull wing design? Is there also a disadvantage to this? The wing design just seems odd, and as far as I know it is one of the only planes to use this design....
user avatar
37 votes
9 answers
41k views

Why does An-225 have anhedral wings though it is a cargo aircraft?

What are the rationale behind this anhedral high mounted wing configuration? Is that usual for very large carge aircraft?
menjaraz's user avatar
  • 2,435
19 votes
3 answers
21k views

Why are high-wing aircraft more stable?

A high-wing aircraft is considered to be more stable in a side-slip because of the pendulum effect. How does the pendulum effect increase stability in high wing aircraft? This question is about high-...
user13197's user avatar
  • 11.4k
18 votes
4 answers
7k views

Why does rudder cause roll?

In the few rudder incidents with the B737, rudder-freeze caused the airplane to roll. From what I know, the rudder causes yaw while the aileron causes roll. Why in the case of these accidents/...
SMS von der Tann's user avatar
13 votes
3 answers
11k views

What are the pro/cons of polyhedral cranked wings?

Dihedral wings seems to be very common (almost if not all low-wing airliners, many modern gliders,...). Polyhedral seems to be less common and mainly found in relatively old aircraft (F4 Phatom, F4U ...
Manu H's user avatar
  • 16.5k
12 votes
1 answer
3k views

In a slip or skid, how does one wing have a higher angle of attack and more lift?

I've discussed this with my instructor numerous times, and I have the concept memorized, but from an aerodynamic point of view, I can't see how the angle of relative wind to chord line is different ...
Josh Toth's user avatar
  • 235
10 votes
3 answers
1k views

Is this paragraph about the dihedral effect in the FAA's Glider Flying Handbook correct?

I've been reading the FAA's Glider Flying Handbook, 2013 (FAA-H-8083-13A). In chapter 3 ("Aerodynamics of Flight"), the book is discussing stability. On page 3-12, it states: Dihedral is the upward ...
Tanner Swett's user avatar
  • 5,781
4 votes
1 answer
648 views

Is a biplane without dihedral more stable than a low wing monoplane without dihedral?

I was wondering if a biplane's top mounted wing created the same stability effect as that of a high wing airplane? Also, would the unstable effects of the low wing cancel the stability provided by the ...
Martins's user avatar
  • 325
3 votes
6 answers
1k views

How does the vertical height of the wings on a plane affect flight relative to its position? E.g., how does a higher high wing affect flight?

I think I understand how a high wing differentiates from a mid wing or a low wing; what I am asking is how, for instance, a very high high-wing makes itself unique in flight from a very low high-wing. ...
Barron Syams's user avatar
3 votes
2 answers
1k views

What are the effects of the tilted lift vector in a banked plane?

I want to clarify the effects of the change in direction of the lift vector caused by banking in a plane. Banking rotates the lift vector creating a horizontal component. I have read that some ...
James Kempton's user avatar
3 votes
2 answers
535 views

Contribution of wing vertical location to roll stability

Recently, I was reading about the factors that contribute to roll stability of an aircraft and came across a point stating that the wing's vertical location (Distance of wing from CG) contributes to ...
CuthillMckee's user avatar
2 votes
2 answers
48 views

Change of Roll moment with change of wing position (z-direction)

If I compare two identical configurations, which only differ from each other in low wing and high wing position. We assume that the lift and drag remains constant. Will I get the same coefficients in ...
Steven's user avatar
  • 21
1 vote
2 answers
331 views

Is the amount of dihedral on low wing aircraft based more on landing considerations than on aerodynamic benefits?

During a recent discussion on glider design, a quandary arose over what the aerodynamic effects of moving an otherwise unchanged wing from the top of an aircraft to the bottom would be. One claim was ...
Robert DiGiovanni's user avatar
0 votes
0 answers
161 views

What are aerodynamical reasons behind slight dihedral or no dihedral at all? [duplicate]

Regarding general aviation single engine high wing aircrafts in particular, what are the reasons for some of them to have no dihedral at all on their wing, or slight positive dihedral angle for other? ...
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