Linked Questions

0
votes
2answers
382 views

What are the methods of reducing vortex? [closed]

I have tried reading the notes on the wing tip, but didn't understand well. How will the vortex be reduced on the wing tip.
11
votes
1answer
3k views

Any info on very strange wing endings on this Stemme glider?

Do you have any info on this strange wing endings used on Stemme glider? Source
9
votes
1answer
1k views

Minix wingtip vortices mitigation - How does it work?

I stumbled upon this article: Minix wing tip device promises 6% gain in fuel efficiency for airliners. Such an economy is appealing and I must confess the design is "sexy". Could someone expand a ...
8
votes
1answer
709 views

Lift distribution on biplanes

This Wikipedia page about biplanes says in a wing of aspect ratio 6, and a wing separation distance of one chord length, the biplane configuration will only produce about 20 percent more lift than ...
8
votes
1answer
2k views

Why are aircraft designed so that the wing stalls before the tail?

I read somewhere that conventional aircraft are designed so that the main wing always stalls before the tailplane. Why is that? My concern is that if the wing stalls, suddenly the tail will push the ...
4
votes
1answer
696 views

Where does upward momentum come from in leading edge vortex?

I believe I am beginning to understand how a leading edge vortex creates lift. Faster air creates a lower pressure above the wing making lift. But I am hoping to get another view of this in terms of ...
4
votes
1answer
2k views

What are the pros and cons of a lift fan versus a helicopter?

F-35 uses lift fan which can create 20,000 lbs (9 tonnes) of lift in a small compact platform. I can see three or four of such lift fans that could lift a heavier plane and is seems better than a ...
3
votes
1answer
116 views

How can one change the wingtip geometry to enhance the wingtip vortices?

I'm doing some research on enhancing wingtip vortices as part of my Honours project. After spending a fair bit of time in the literature and on this forum I have some models which should kick-start my ...
1
vote
1answer
341 views

How can wingtip vortices affect the direction of the relative wind in front of the leading edge?

I have a question on aeroalia's answer on this post (Why does the vortex created by wing affects its own angle of attack?). If I'm not mistaken, wingtip vortices are generated behind the trailing ...
0
votes
1answer
325 views

Why do I see moisture coming from the middle of the wing as well as wingtip vortices? [duplicate]

A lot of times I see small tube like streams of visible moisture training from the middle of an airliners wing. I assume this is induced drag created by wingtip vortices, when the aircraft is heavy, ...
0
votes
1answer
636 views

Spanwise flow and wingtip vortices in forward-swept wings

One of the benefits of forward-swept wing is that spanwise flow direction is from tip to root. However, in this answer an X-29 has quite significant sweep angle, at which drawbacks such as ...
0
votes
1answer
687 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 ...
-3
votes
1answer
367 views

Design winglets to counteract tip vortex [closed]

I want to know the effect of the wingtip vortex to design a winglet (or a wing horizontal extension) to counteract* this effect. How could I calculate the momentum produced by the tip vortex, in ...
-7
votes
1answer
2k views

How do the propeller blades accelerate air resulting in thrust to push an aircraft forward? [duplicate]

I do know that the blades on a propeller generate lift to provide a force pushing back on the air based on newton's law the 2nd. What I am having trouble understanding is how the blades generate ...
1
vote
0answers
213 views

How does downwash bend airflow down? How can wing-tip vortices reach the airflow in front of the wing? [duplicate]

Wing-tip vortices only start occurring when the pressure difference on the two sides of the wing starts. Wouldn't this mean that by the time the downwash from the vortices is acting on the airflow it ...

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