[NSRCA-discussion] aero question

[george w. kennie]

Ahhh yes, I see that Nat. Now all I have to do is remember it.
G.




----- Original Message ----- 
From: "Nat Penton" <natpenton at centurytel.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.f3a.us>
Sent: Sunday, January 06, 2008 4:50 PM
Subject: Re: [NSRCA-discussion] aero question


> 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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