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Old 10th February 2009 | 22:55
  #56 (permalink)  
FE Hoppy
 
Joined: Sep 1998
Posts: 1,615
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From: wherever
CS25

Vsr may not be less than the 1g stall speed.

Therefor if I'm at a speed lower than that required to maintain 1g flight I am by definition stalling.

There is also a reference somewhere that refers to the fact that if the control is on the rear stop the aircraft is stalled. I will print it when I find it.

I used the term Wing stalled to reference alpha above that which first achieves Clmax and Aircraft stalled when at Clmax weight is greater than Lift.

I understand the Airbus has Alpha floor which increases thrust to ensure that when Clmax is achieved V^2 is always high enough to arrest descent.

Sorry for the confusion.

Nigel. After flow analysis was complete your Airbus was flight tested with false leading edges on the empennage to simulate the maximum ice build up. the handling characteristics met all requirements so no anti ice system is required.

From CS 25.201 Stall Demonstration.
......
The aeroplane is considered stalled when
the behaviour of the aeroplane gives the pilot a clear
and distinctive indication of an acceptable nature that
the aeroplane is stalled. (See AMC 25.201 (d).)
Acceptable indications of a stall, occurring either
individually or in combination, are –
(1) A nose-down pitch that cannot be
readily arrested;
(2) Buffeting, of a magnitude and severity
that is a strong and effective deterrent to further
speed reduction; or
(3) The pitch control reaches the aft stop
and no further increase in pitch attitude occurs
when the control is held full aft for a short time
before recovery is initiated. (See AMC
25.201(d)(3).)
.....

So when AOA limiting is in effect the control is at the aft stop but the aircraft will no longer pitch up. This indicates the aircraft is stalled.

Last edited by FE Hoppy; 10th February 2009 at 23:03. Reason: excerpt from cs-25 added for clarification
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