Linked Questions

2
votes
0answers
217 views

What is the cause of Wingtip Stalling? Why do sweptback wings have a tendency of stalling at the tip? [duplicate]

I am a beginner in Aircraft aerodynamics. I have read about the disadvantages of wingtip stalling and the fact that sweptback wings have a greater tendency of stalling at the tips and forward swept ...
34
votes
9answers
24k 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?
42
votes
9answers
9k views

How complete is our understanding of lift?

I'm currently studying for my PPL and one of the accepted textbooks contains the following disclaimer at the end of the Principles of Flight section on lift: It is important to note that the ...
41
votes
3answers
15k views

Why does supersonic flight detach airflow from a wing?

I've read in several answers to questions that when a wing passes the speed of sound the airflow will become detached from the craft towards the rear quarter of the wing (thus making things like ...
29
votes
5answers
43k views

What are the advantages of a forward-swept wing over a rearward-swept wing?

What are the advantages of a forward-swept wing vs. a rearward swept one? Image credit: NASA Image credit: Paul Maritz / Wikimedia
18
votes
3answers
7k views

Why do some military aircraft use variable-sweep wings?

There are a couple of American military aircraft (the retired F-14 and the B-1 come to mind immediately), that have variable swept wings. I know that they keep the wings full out (roughly ...
14
votes
3answers
2k views

Why does the U-2 Dragon Lady not have swept wings?

Swept wings increase the critical mach number for aircraft with otherwise identical wings (Source 1). The U-2 Dragon Lady is limited in altitude by its critical mach number, as it needs more speed in ...
13
votes
3answers
38k 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 ...
13
votes
3answers
4k views

How do manufacturers engineer their aircraft to deal with tail strikes?

I have been told that tail strikes on take off and landing are rare but do occur. I think, in my mind, the tail touching the ground at all would just make the tail fall off, but it appears I was ...
14
votes
2answers
2k views

Why do some airplanes have simultaneously a straight wing and a swept horizontal stabilizer?

I'm sure there are many other examples like this one: Embraer EMB 120 with an almost straight wing and an obviously swept horizontal stabilizer. Why is there a difference in sweep angle between the ...
12
votes
2answers
4k views

Is airflow ever laminar in the boundary layer, near the wing leading edge?

I'm used to see images of the boundary layer over a wing like this: Transition from laminar to turbulent flow over the wing. Left: source, right: source As many others, these pictures indicate the ...
8
votes
3answers
2k views

Why is the tail group of virtually every airplane swept instead of straight?

Even low performance airplanes like ultralights have their tail group (vertical and horizontal stabilizer with rudder and elevator) swept backwards knowing fully well that a straight tail group will ...
12
votes
2answers
3k views

Why is the coefficient of drag for straight wings at supersonic speeds lower than for swept wings?

Why is the coefficient of drag of a straight wing lower than the coefficient of drag of a swept back wing at higher supersonic speeds (above, say, Mach 2)?
9
votes
2answers
4k views

What is the optimal wing sweep angle for a passenger airliner?

There are many different types passenger planes, but is there a optimal wing angle for these planes, that improves the plane's take off speed for example, or the fuel efficiency The Boeing 747 has a ...
6
votes
3answers
6k views

What is the way to calculate the required twist of a flying wing?

I am interested in flying wings and a couple of weeks ago I started researching them. I found mh-aerotools.de website and think it's a great source. The website stated that flying wings need twist ...

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