REFLECTOR: Velocity video
Brett Ferrell
reflector at velocityxl.com
Fri Feb 1 05:46:59 CST 2008
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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