Linked Questions

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2answers
926 views

What is the significance of stall speed [duplicate]

Irrespective of the stall speed, the only reason aircraft stalls is when its control surface (elevator, aileron) exceeds critical AOA. Then what is the significance of the stall speed? Does the ...
0
votes
1answer
427 views

How is a stalling speed not affected by airspeed? [duplicate]

A question from the aerodynamics section of the FIA written: Which action will result in a stall? Incorrect answer: Flying at too low an airspeed Correct answer: Exceeding the critical angle of ...
29
votes
11answers
15k views

Why can gliders fly for so long?

When you throw a paper airplane, it flies for a couple of seconds before losing speed and stalling. With a glider, it has a very long wingspan, but you take off with another plane or winch tow pulling ...
39
votes
2answers
22k views

How do aircraft stall warning systems work?

If an aircraft stalls, there are stall warning systems called as Stall computers. Anyone has idea how they predict that its a stall and how they raise the alarm/warning?
41
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3answers
14k 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 ...
30
votes
5answers
4k views

How “over-engineered” were old planes and how “over-engineered” are they now that we have more advanced testing and research options?

I've seen several times on shows on television, and even talking to older pilots, where they will tell me that old planes were "over-engineered" to add some margin for errors on the designed ...
31
votes
3answers
7k views

What is the immediate cause of stall?

The direct cause of stall is unclear to me. I heard about exceeding maximum angle of attack (around 40°) ; I heard about reaching the stall speed in the current configuration (flaps, etc). I heard ...
8
votes
3answers
2k views

Why is stall speed listed in a POH?

In this comment on this question about stall warning systems, it was stated that: You can stall at any airspeed (see this question and this one) and in any attitude, only the AoA is important ...
6
votes
4answers
2k views

Does the expression “stall speed” have a definition?

I read, not only on this site, that the stall speed of an airfoil doesn't exist, and I usually make the effort to stay away from this expression. While an airfoil can stall at any airspeed, it's ...
4
votes
3answers
16k views

What is the typical angle of attack aircraft fly at and at what angle of attack do they stall?

At what angles of attack do aircraft typically fly at? How much of a margin is there before aircraft stall due to an increase of an angle attack due to factors such as gusts or rotation of the wing ...
7
votes
3answers
4k views

Is there always a stall if you exceed a specific angle of attack?

So lets consider that the stall angle (=Cl max) of a B747 is at 16° (in clean configuration). Does this mean, that, at whatever speed you are flying (i.e. 500 knots), you would stall if you go on a ...
6
votes
2answers
3k views

How does a nose down stall occur?

Imagine I am in a straight down dive, at terrific speed, and if I wanted upward sharp turn and got the stick back far enough, would I stall (or spin)? Does normal laws apply when the aircraft nose is ...
7
votes
2answers
2k views

How often are slats used on airliners?

Are slats only used when there is a short runway or on all occasions?
4
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2answers
13k views

How does the IAS stall speed vary with increasing altitude?

First of all, we all know what IAS is and if not for some people you can follow this link to read the basics about stall and the differents speeds. So we also know that our TAS/ Mach number will ...
7
votes
1answer
3k views

Where does the flat plate theory in this paper come from?

The aerodynamic model cited in this paper (pdf) as "flat plate theory" was a good first-order approximation of the aerodynamics of a perching glider. I immediately saw the similarity with the ...

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