[NSRCA-discussion] Aero design question

[Rcmaster199 at aol.com]

Now John may be on to something here....3 servos driving each aileron on a 
pattern plane. HMMMMM!!!

If helical is what you want, cut the aileron 3 ways, proportional areas in 
each segment of course and drive it with Johns 3 preprogrammed servos. And you 
can use the smallest, fastest servos around so your response will be outasight. 
That's the ticket laddie, Ahuh....

VBG

I think I'll open another bottle of Rafanelli '02, and continue toasting :)

Matt


In a message dated 9/4/2006 10:50:47 PM Eastern Standard Time, 
jpavlick at idseng.com writes:
Now that sounds like the way to go! Except I think you actually need 3 servos 
to do it right. I'm setting up the mix on my 12z now...

John Pavlick
http://www.idseng.com/
  
-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org 
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of george w. kennie
Sent: Monday, September 04, 2006 9:55 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Aero design question


For cryin' out loud, if your going to go to all that trouble, use two servos 
per panel at the opposing extremes of each flexible aileron driving in 
opposite directions. Now that's HELICAL !!!!!!!!!!!!!!!  What the  heck have you guys 
been smokin' ??????????????  And I thought I was extreme. Are we in the 
"Twilight Zone" here?  BGw?
G.




----- Original Message ----- 
From: Lance Van Nostrand 
To: NSRCA Mailing List 
Sent: Monday, September 04, 2006 9:05 PM
Subject: Re: [NSRCA-discussion] Aero design question


Helical pitch ailerons!  Nat, this is brilliant.  Instead of making stiff 
ailerons, make them to flex.  glue the tip to the wing tip and drive the root 
end.  Ailerons would work just like a 74x6 propeller.

--Lance

----- Original Message ----- 
From: Nat Penton 
To: NSRCA Mailing List 
Sent: Sunday, September 03, 2006 9:31 PM
Subject: Re: [NSRCA-discussion] Aero design question


Hey Tom
I'm not providing solutions - just putt'in more wood on the fire. In steady 
state roll the least drag position of the ailerons would be constant AOA root 
to tip. This would call for the percentage of chord to progress linearly so 
that it would be double at the tip vs the mid span position - no different than 
helical pitch. A ( severe ?) negative would occur, though, when the ailerons 
are initiated, potentially causing a tip stall.

Martin Simmons provides a curve showing Cl vs % of chord for the aileron. 
Going over 20% doesen't get you much for the dollar - just much more servo wear 
and tear ( especially with the 160 <G> ).

IMO it is not worth the extra work to stop the ailerons short of the tip.     
                       Nat
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