Linked Questions

1
vote
1answer
6k views

Why aren't variable swept wings being used in newer military aircraft? [duplicate]

After finding out how well the variable swept wing design served the F-14, why hasn't it been used more often (outside of a select few)? Almost all of the fighters after the cold-war era haven't used ...
0
votes
2answers
259 views

Why manufacturers does not producing variable sweep wing in our current scenario? [duplicate]

I read about many types of aircraft wing configurations like rectangular, swept forward, swept backword, and Delta wing. These configurations have their own advantages and disadvantages. But why we ...
0
votes
0answers
96 views

Why don't commercial aircraft have variable sweep wings? [duplicate]

I was wondering why commercial aircraft don't have variable sweep wings just like the Bell X-5 did? By sweeping the wing further at high altitude it helps the aircraft move faster and also it helps ...
104
votes
4answers
30k views

Why is the maximum speed of current fighter aircraft lower than those from the 1960's and 1970's?

While reading about the characteristics of the newest fighter aircraft, I observed that their maximum speed is lower than of the aircraft in the same roles half a century ago. For example, the iconic ...
20
votes
4answers
5k views

Was the Boeing 2707 design flawed?

The mach 2.7 capable Boeing 2707 has an interesting design. I'm curious if there has been any studies done that concluded that this aircraft would simply not have worked, given the way it was ...
11
votes
2answers
51k views

What happens when an aircraft breaks the sound barrier?

What happens when an aircraft breaks the sound barrier? Why can't it break the sound barrier near the ground?
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 ...
14
votes
2answers
11k views

What is the reason for the poor low-speed characteristics of sweptback wings?

I know there are advantages of swept-back wings delaying shock-wave allowing a aircraft to fly faster. However, what are the disadvantages. I know one of them is that they have very poor low speed ...
15
votes
3answers
5k views

What are the limiting factors for high altitude planes (e.g: U2 or SR71) preventing them from going higher?

I'm curious as to why planes like the U2 Dragon Lady and the SR71 Blackbird couldn't fly higher. What physical constraint set their operational ceiling? Pilots wore spacesuits, so that wasn't the ...
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 ...
12
votes
2answers
2k views

Can a supersonic plane use a subsonic wing if the nosecone shock produces subsonic airflow around the wing?

A supersonic plane will produce shock waves off the nose cone, as seen below: These oblique shocks reduce the speed of the air that the wing experiences. If the plane is at a low enough Mach number, ...
6
votes
3answers
1k views

What are the benefits of a pivot wing?

The answer to another question mentions the rather unusual pivot wing. From an aerodynamical standpoint, what are the benefits of an oblique wing compared to a delta, a trapezoid or a forward swept ...
3
votes
5answers
600 views

Is wing sweep needed on supersonic aircraft?

Area rule states that bodies with the same crossectional area distribution have the same drag. Does that mean I could use a straight wing on mach 1.2 aircraft with performance as high as sweep winged ...
2
votes
2answers
869 views

How does the shift in aerodynamic center affect the performance of swing wing aircraft?

I am trying to understand how a variable sweep wing changes the aerodynamic center of a plane, and its effect on the plane's maneuverability. I also would like to know the importance of the pivot ...
7
votes
2answers
409 views

How would a low-airspeed fixed-wing drone be designed to reduce effects from gusts and wind shear?

In a story I am working on, the characters need a fixed-wing drone that can rendezvous with a blimp, where by "rendezvous" I mean "come within a very short distance at low relative airspeed". The ...

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