You are quite right. A 40 per cent increase should be for a 60deg bank
turn. My mistake.
Nigel
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Mark Burton
Sent: 07 August 2006 15:13
Subject: Europa-List: Re: stalls and spins
[quote="nwcmc@tiscali.co.uk"]It is important to realise with all
stall warning systems whether they
are giving you warnings above a nominated speed or whether they are
giving you a warning that you are approaching a critical AOA.
For example 5kts warning above a critical AOA is better than 15kts
warning above a speed which is the wings level one 'g' stall speed. If
you bank 45deg in level flight the stall speed increases by about 40 per
cent so if your wings level stall speed was 40kts at 45deg bank it
becomes about 56kts. Thus in this case a speed warning of 15kts before
the stall becomes no warning at all whereas a conventional stall warner
or AOA system will still provide the 5kt warning
Nigel Charles[/quote]
I think you will find that the stall speed increase is proportional to
the square root of the G loading and so in your example above the stall
speed increases by 20% to 48kts rather than by 40% to 56kts.
Nonetheless, the point you are making is a good one and I have already
started developing the next generation of SmartASS that will take into
account the G loading so as to provide the pilot with more warning
margin.
Mark
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