Linked Questions

2
votes
2answers
38 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 ...
52
votes
3answers
38k 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....
12
votes
3answers
7k 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 ...
10
votes
3answers
713 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 ...
18
votes
3answers
14k 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-...
35
votes
9answers
27k 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?
3
votes
2answers
157 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 ...
3
votes
2answers
829 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 ...
4
votes
1answer
540 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 ...
17
votes
4answers
5k 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/...
12
votes
1answer
2k 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 ...