REFLECTOR: Deep Stalls

[Chuck Jensen]

Thanks, Brett.  I'd heard anecdotal comments about both of these articles but had never seen them.  I now have them tagged--do not discard!

Chuck Jensen


-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]On
Behalf Of Brett Ferrell
Sent: Friday, February 01, 2008 6:47 AM
To: Velocity Aircraft Owners and Builders list; Velocity Aircraft Owners
and Builders list
Subject: Deep Stalls


Dave,

I don't think it generally is recoverable, that's the problem.  Here are a couple of old articles on Deep Stall, offered in the name of education/safety (fair use) since they're on my website without permission.

http://www.velocityxl.com/Downloads/CP76/CP76-P2.htm - Canard Pusher 76 reprint "The Latest on Deep Stall"
http://www.velocityxl.com/Downloads/VelocityDeepStall.pdf - Deep Stall Solution - July 1991 Sport Aviation

Brett


>  -------Original Message-------
>  From: Dave Philipsen <velocity at davebiz.com>
>  Subject: Re: REFLECTOR: Velocity video
>  Sent: 01 Feb '08 00:48
>  
>  John Dibble wrote:
>  >
>  > I believe
>  > that for the stall test, had I not pulled back on the stick and instead used my trim
>  > button, I would have achieved a lower speed where the main wing would have stalled and
>  > the canard kept flying (deep stall).  This is just theory as I'm not willing to try
>  > it.  This is my reason for recommending never to trim for level flight at a speed less
>  > than 80 kn.
>  >
>  > John
>  Interesting theory indeed.  'Makes sense too.  I would also think that
>  as long as the canard is still flying (not stalled) you should be able
>  to recover from the 'deep stall'.  Like you, I don't think I'd want to
>  experiment with that though.
>  
>  I have, on occasion, used your technique when I'm coming in a bit too
>  high on final (above the glideslope).  That is, I'll pull back on the
>  stick and cut the throttle slowing down close to stall speed.  It drops
>  pretty fast when I do that. I think the nose up attitude and the CS prop
>  at fine pitch provides a lot of drag.  But I always pull out of that
>  condition (I guess on the backside of the 'power curve') and get back to
>  somewhere around 75-80 kts as I approach the runway. Usually I have to
>  put in a little power too else I slip below the glideslope.
>  
>  --
>  Dave Philipsen
>  Velocity STD-FG
>  N83DP
>  
>  
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