As Mark says stall angle is complicated but they manage to present a lot of it on the primary flight display alongside the airspeed strip:
cid:[email protected] From: [email protected] [mailto:[email protected]] On Behalf Of Mark Newton Sent: Monday, 30 May 2011 6:32 PM To: [email protected]; Discussion of issues relating to Soaring in Australia. Cc: DMcD Subject: Re: [Aus-soaring] Stalls On 30/05/2011, at 5:07 PM, [email protected] wrote: Stall angle gets really complicated and modern airliners will have a computer to work it all out and provide warning to the crew. Most of the time this takes the form of a 'stick shaker' - a system which mechanically shakes the control column to alert the crew. Airbus aircraft don't have stickshakers, because Normal Law is supposed to make stalls impossible (the aircraft will override the pilot by adjusting power, pitch and height as the stall approaches) There's an audible alarm instead (sounds like a chirping of crickets). it is not the first time that this has happened in recent history. I read in an Air Safety magazine relatively recently that an airliner pilot on approach into Alice Springs encountered stall warning twice. That's one of the catalysts for Sen. Xenophon's current Senate inquiry into air safety. Another was sparked by a different crew in a Q400 approaching Mascot last year, which experienced a stick shaker warning and initiated a go-around, then had another stick-shaker warning on the second landing attempt and continued the approach regardless. (and the bodgied-up go-around procedures. and the microburst takeoff. and the near-miss north of Tullamarine... :) - mark -------------------------------------------------------------------- I tried an internal modem, [email protected] but it hurt when I walked. Mark Newton ----- Voice: +61-4-1620-2223 ------------- Fax: +61-8-82231777 -----
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