[NSRCA-discussion] Aero design question

[John Pavlick]

Yeah, or do the "flexiron" thing. You can make all kinds of cool shapes with
3 servos. The flexible aileron will interpolate the rest of the curve
(somewhat). Think about it. Hey, maybe we should actually try this.

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
Rcmaster199 at aol.com
  Sent: Monday, September 04, 2006 11:04 PM
  To: nsrca-discussion at lists.nsrca.org
  Subject: Re: [NSRCA-discussion] Aero design question


  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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