The simple standard stall warner, like the small vane type that some of
us have, works on AOA so should always give a timely warning before the
stall whatever the bank or 'g' loading provided they are set up
accurately in the first place. However they are just like a switch
either on or off. A calibrated AOA gauge with audio as well gives
several stages of warnings both audio and visual. Monitoring an AOA
gauge during less critical flight situations helps to educate the pilot
what the margin is from the stall for different loadings. Which you
choose is up to you. Either way I think it is a wise precaution to have
at least the simple version as an extra layer of safety protection.
Nigel Charles
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Karl Heindl
Sent: 07 August 2006 17:00
Subject: Re: Europa-List: Re: stalls and spins
Okay, but how does all this relate to the standard stall warner as
supplied
by Europa. An adjustable low-pressure switch which goes ON when pressure
changes to vacuum at the bottom of the leading edge. Very simple, cheap,
and
should work at all speeds and attitudes, except maybe when inverted. Am
I
wrong here ?
Karl
>From: BEBERRY@aol.com
>Reply-To: europa-list@matronics.com
>To: europa-list@matronics.com
>Subject: Re: Europa-List: Re: stalls and spins
>Date: Mon, 7 Aug 2006 10:52:56 EDT
>
>I really like the idea of the 'Smartass' and agree with the concept of
AOA
>being a better indication than IAS. The actual stall speed is easily
>calculated by a simple triangle of forces i.e. the amount of 'lift'
which
>is keeping
>the aircraft in the air as opposed to that which is inducing a turn.
>
>Incidentally 'when I were a lad!', being rash enough to fly in Sea
Vixens,
>we commonly practised spoken IAS by the observer on the approach, which
was
>also transmitted to Flyco at the same time. The approach speed was 128
>knots
>with normal landing all up weight . Being within 1 knot of that speed
was
>essential. 2 knots too slow and you likely hit the stern of the
carrier
>and you
>were dead. 2 knots too fast and you would 'float ' over the wires and
>have
>to get power on quickly to go around again.
>
>Not amusing at night on a pitching deck!
>
>Patrick
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