[NSRCA-discussion] aero question

[Nat Penton]

George
Wing incidence determines the roll axis. Which can effectively raise or 
lower the cp of the rudder.

Ed White's idea regarding asymetric rudder stall is a strong possibility. 
Nat

----- Original Message ----- 
From: "george w. kennie" <geobet at gis.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.f3a.us>
Sent: Sunday, January 06, 2008 1:48 PM
Subject: Re: [NSRCA-discussion] aero question


>
> Jay,
> I'm sure that you're aware that the condition you reference is "adverse
> couple" and sounds like the center of pressureof the rudder is located too
> high partly caused by insufficient dihedral in the wing. Increasing rudder
> area down low might help, but I think the real culprit is dihedral. 
> Vertical
> C.G. might also have an effect. Is all the hardware located high in the
> airframe? Also, how far below the datum is the wing located. If it's a 
> lot,
> this could also contribute. I agree that the condition is there all the
> time, just exacerbated by the extreme deflelction angles. I can't see how,
> if the dihedral angle is correct, that incidence is going to affect roll
> issues.
> G.
>
>
>
>
>
> ----- Original Message ----- 
> From: "JShulman" <jshulman at cfl.rr.com>
> To: "NSRCA" <nsrca-discussion at lists.nsrca.org>
> Sent: Saturday, January 05, 2008 8:42 PM
> Subject: [NSRCA-discussion] aero question
>
>
>> Just back from flying with Ryan and we were talking about some
>> possibilities that would cause a plane to roll on KE with more
>> rudder, but not less. Would a more raked tailpost fix this heavy rudder
>> roll? Ex- Hard Left rudder produces a noticeable Right roll,
>> but "regular rudder" for normal KE needs no correction. What do you guys
>> think...
>>
>> Regards,
>> Jason
>> www.jasonshulman.com
>> www.shulmanaviation.com
>> www.composite-arf.com
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