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Date: Sun, 30 Apr 2006 19:30:58 -0400
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From: "terrence o'neill" <troneill@charter.net>
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Subject: Re: [LML] Re: AOA
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Skip, ...
...if I may offer a comment?
    'Stall' is when the airflow breaks away from (normally) the upper 
surface... and 'lift' is irrelevant.  As the wind-tunnel guy said, the wing 
stalls at an angle, not a velocity.
A Lancair or any wing can be generating 5 PSF or 50 PSF or 500 PSF, and it 
will still stall at the same angle... say 15 degrees, or whatever.
I don't have any idea what the Chelton does, but wind-to-wing ANGLE is all 
that you need, to see and avoid stalling, or to unstall.
    Its ANGLE ANGLE ANGLE.

Respectfully offered  : )
Terrence N211AL

----- Original Message ----- 
From: "Skip Slater" <skipslater@earthlink.net>
To: "Lancair Mailing List" <lml@lancaironline.net>
Sent: Sunday, April 30, 2006 12:53 PM
Subject: [LML] Re: AOA


> Kevin,
>   My understanding is that Chelton computes AOA rather than actually
> measure the lift the wing is creating, using inputs provided by the
> operator.  If that's incorrect, I hope one of the Chelton gurus will 
> correct
> me.  The AOA Pro or Sport measure actual lift by comparing pressure on the
> top and bottom of the wing.  Based upon that, my impression is that 
> they're
> more accurate.
>   Sip Slater
>
>
> --
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