Snaps

[Adam Glatt]

Isn't the definition of a stalled wing just that it doesn't have laminar 
flow?  That is entirely possible in a downline with sharp elevator input 
(think less extreme version of a TOC plane's parachute or wall).

-----Original Message-----

>       *From:* discussion-request at nsrca.org
>       [mailto:discussion-request at nsrca.org]* On Behalf Of* Ed Alt
>       *Sent:* Tuesday, April 13, 2004 11:37 PM
>       *To:* discussion at nsrca.org
>       *Subject:* Re: Snaps
>
>       Jim:
>
>       The wing is stalled when the critical angle of attack is
>       reached, which can happen at any airspeed, starting from any
>       flight attitude. This is most easily seen & felt if you go up in
>       a light plane and gradually work the yoke back, increasing the
>       angle of attack and holding altitude as airspeed bleeds off
>       before the stall.  This can go on for many seconds.  The total
>       lift is staying the same before the stall, but the wing doesn't
>       stall until the angle of attack gradually increases to the point
>       that the critical AOA is reached.  In that example, the critical
>       AOA will be reached at a lower airspeed due than if the pilot
>       had done an accelerated stall by yanking the yoke rapidly back.
>
>       Ed
>
>             ----- Original Message -----
>
>             *From:* _JOddino_ <mailto:JOddino at socal.rr.com>
>
>             *To:* _discussion at nsrca.org_ <mailto:discussion at nsrca.org>
>
>             *Sent:* Wednesday, April 14, 2004 1:15 AM
>
>             *Subject:* Re: Snaps
>
>             How do you stall a wing that is not producing any lift, as
>             in the case when the plane is on a vertical up or down line?
>
>             My definnition of stall is when an increase in angle of
>             attack does not produce an increase in lift.  Another
>             might be when the lift does not exceed the weight.  I've
>             got to believe we know a snap when we see it and we ought
>             to quit trying to describe it in words.
>
>             Jim
>
>                   ----- Original Message -----
>
>                   *From:* _Patternrules at aol.com_
>                   <mailto:Patternrules at aol.com>
>
>                   *To:* _discussion at nsrca.org_
>                   <mailto:discussion at nsrca.org>
>
>                   *Sent:* Tuesday, April 13, 2004 6:13 PM
>
>                   *Subject:* Re: Snaps
>
>                   In a message dated 4/13/2004 8:06:56 PM US Eastern
>                   Standard Time, _rcsteve at tcrcm.org_
>                   <mailto:rcsteve at tcrcm.org> writes:
>
>                         * Don't stop reading as so many do, this is
>                         the next sentence.*
>
>                   *  *
>
>                   * 1. Since the maneuver is defined as a stall maneuver
>                   (initiated by a rapid stall of the wing induced
>                   by a change in pitch attitude), the nose of the
>                   fuselage should show a definite break from the
>                   flight path in the direction of the snap (positive
>                   or negative) while the track closely maintains
>                   the flight path.
>                    *
>
>                    
>
>                    
>
>                   */Steve Maxwell/*
>

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