• NC Software is proud to announce the release of APDL - Airline Pilot Logbook version 10.0. Click here to view APDL on the Apple App store and install now.

Anti-Stall device???

flythere

Well-known member
Joined
Nov 11, 2002
Posts
481
Total Time
11,000
I found this article somewhat puzzling! Anybody know what this anti-stall device is that the pilot can activate??

I didn't know the Airbus had a ditching switch, to close external doors below the water-line!

Is this some new technology those Canadians came up with and have kept a secret??

"At some point, the pilot switched on the anti-stall device that increases the speed of the plane by 20 knots and gives the pilot more margin to recover from a stall if it occurs"

Posted on Comcast.net from the associated press, William Kates and others contributed
 

nethan

Well-known member
Joined
Jun 17, 2003
Posts
305
Total Time
Enough
I don't fly the Q but from my understanding, when ice is detected by the system you are supposed to press this button that adds 20 knots to the stall protection computer's calculated speeds.
 

VF45

fight's on
Joined
Nov 2, 2005
Posts
6
Total Time
>8000
The only one I'm aware of is a clipboard in the hands of the pilot monitoring...
 

Abernathy

Truthiness
Joined
Mar 4, 2008
Posts
1,490
Total Time
Lots
I don't fly the Q but from my understanding, when ice is detected by the system you are supposed to press this button that adds 20 knots to the stall protection computer's calculated speeds.

Similar system on the ATR, only if I remember correctly, it was automatic.
 

flythere

Well-known member
Joined
Nov 11, 2002
Posts
481
Total Time
11,000
On the 737 and MD, we had an anti-stall system that only works when the slats are at mid or extend position and the SMYD computer detects a stall condition, the computer will drive the slats to full extend to provide more lift!

So you are saying in this system it actually adds power? Is it done through the fuel control unit, through PMC or EEC or through the auto-throttle?

Thanks!
 

cheerios2

Active member
Joined
Apr 13, 2008
Posts
41
Total Time
none..
Similar system on the ATR, only if I remember correctly, it was automatic.

It was predicated on AOA..
There is a table ourasa.com documents flightops at72 poh 6.03

"The system uses torque and flap configuration to determine
triggering thresholds."

For example: ice free:

Shaker STICK PUSHER
Flaps 15° Flaps 15°
HI PWR 10.7° 14.0°
LO PWR 11.3° 14.6°



Whenever the ICING AOA(activation of level 2 decice systems) light is illuminated, the aircraft is
protected by an earlier stall warning threshold as follows

shaker pusher
Flaps 15° Flaps 15°
8.4° 10.9°


No power added... just quicker to buzz you
 

flythere

Well-known member
Joined
Nov 11, 2002
Posts
481
Total Time
11,000
Very interesting, thanks for the info!!
 

Axel

Well-known member
Joined
Dec 3, 2003
Posts
1,132
Embraer does the same thing. Detected ice resets the alpha for stall warning activation. The crew will then set and fly higher speeds for the approach, but the airplane will not automatically speed up.
 

flythere

Well-known member
Joined
Nov 11, 2002
Posts
481
Total Time
11,000
The 737 NG will reset your app ref anytime wing ice is used during a flight.
 

strega7

Well-known member
Joined
Feb 13, 2002
Posts
225
Total Time
7500+
Our Brasilia fleet is being updated with a mod that increases the speed at which the shaker will activate (AOA) but leaves the pusher AOA the same. It only does this when the ICE CONDITION light is on.
 
Top