REFLECTOR: Sparrow strainer - I'm confused...

[FLY4FNKEV at aol.com]

Has anyone ever tried to use the sparrow strainer as a movable trim tab?  
Seems a small servo motor in the canard would do the trick. I have  flown 
many times in my neighbors XL and he too runs out of trim at lower speeds  but 
doesn't seem to have a problem at the higher end. 
 
Kevin
 
 
In a message dated 9/14/2012 12:43:07 P.M. Pacific Daylight Time,  
markinchampions at gmail.com writes:

Then why have it?

Sent from my iPad

On Sep 14, 2012, at 1:20 PM, steve korney <_s_korney at hotmail.com_ 
(mailto:s_korney at hotmail.com) >  wrote:




  

I thought you might have something to add  John....


Steve 



> Date: Fri, 14 Sep 2012 13:16:15  -0500
> From: _aminetech at bluefrog.com_ (mailto:aminetech at bluefrog.com) 
> To:  _reflector at tvbf.org_ (mailto:reflector at tvbf.org) 
> Subject: Re:  REFLECTOR: Sparrow strainer - I'm confused...
> 
>  Scott,
> 
> Great explanation.
> 
> John
>  
> On 9/14/2012 12:37 PM, Scott Derrick wrote:
> >
>  >>
> >> If the Sparrow Strainer were inverted to provide  nose down force as 
> >> airspeed increases - this contributes  to negative stability. Which 
> >> is to say, as the aircraft  speeds up, the nose will want to pitch 
> >> down ... which  helps the aircraft speed up, which helps the nose 
> >> pitch  down further ... which helps the aircraft speed up - you get 
>  >> the idea. Imagine this situation if disoriented in IMC.
>  >
> > Anybody who's actually flown A Velocity with the sparrow  strainer 
> > installed both upside down, not installed and  downside down, knows 
> > that the above statement is completely  and utterly false. The plane 
> > will in no way act in the above  manner. What is described above is 
> > negative pitch stability,  which the strainer is way way way to small 
> > to induce. In fact  it's too small to induce neutral stability when 
> > installed  upside down.
> >
> > Speaking from experience, upside or  downside down installation changes 
> > the pitch stability in a  slight way, in fact its hard to tell the 
> > difference in pitch  stability, but it does make a slight positive 
> > change in pitch  trim in cruise.
> >
> > Scott
> >
>  >
> >
> >  _______________________________________________
> > To change your  email address, visit 
> > _http://www.tvbf.org/mailman/listinfo/reflector_ 
(http://www.tvbf.org/mailman/listinfo/reflector) 
>  >
> > Visit the gallery! _www.tvbf.org/gallery_ (http://www.tvbf.org/gallery) 
> >  user:pw = tvbf:jamaicangoose
> > Check new archives: _www.tvbf.org/pipermail_ 
(http://www.tvbf.org/pipermail) 
> >  Check old archives: 
_http://www.tvbf.org/archives/velocity/maillist.html_ (http://www.tvbf.org/archives/velocity/maillist.html) 
>  >
> 
>  _______________________________________________
> To change your email  address, visit 
_http://www.tvbf.org/mailman/listinfo/reflector_ (http://www.tvbf.org/mailman/listinfo/reflector) 
>  
> Visit the gallery! _www.tvbf.org/gallery_ (http://www.tvbf.org/gallery) 
> user:pw  = tvbf:jamaicangoose
> Check new archives: _www.tvbf.org/pipermail_ 
(http://www.tvbf.org/pipermail) 
>  Check old archives: 
_http://www.tvbf.org/archives/velocity/maillist.html_ (http://www.tvbf.org/archives/velocity/maillist.html) 





_______________________________________________
To  change your email address, visit 
_http://www.tvbf.org/mailman/listinfo/reflector_ (http://www.tvbf.org/mailman/listinfo/reflector) 

Visit  the gallery!  _www.tvbf.org/gallery_ (http://www.tvbf.org/gallery) 
user:pw  = tvbf:jamaicangoose
Check new archives: _www.tvbf.org/pipermail_ 
(http://www.tvbf.org/pipermail) 
Check  old archives: _http://www.tvbf.org/archives/velocity/maillist.html_ 
(http://www.tvbf.org/archives/velocity/maillist.html) 

=

_______________________________________________
To  change your email address, visit  
http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery!   www.tvbf.org/gallery
user:pw = tvbf:jamaicangoose
Check new archives:  www.tvbf.org/pipermail
Check old archives:  http://www.tvbf.org/archives/velocity/maillist.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20120914/05ca023f/attachment.html>