[NSRCA-discussion] Odyssey CG

[Ken Velez]

Anthony I think the 3 inches will not work for you that is not 30%. That holds true if it was a straight wing like in a trainer. In a taper wing you have to figure out the center of the wing compensated for the taper and them measure and figure out your 30%. There is a few different ways to do this but I think the easiest is to add the root length to the tip and the tip length to the root. Any way I attached the figure so you can see it, If you have any questions just ask. Hope it helps.\\

Ken
  ----- Original Message ----- 
  From: Anthony Abdullah 
  To: NSRCA Mailing List 
  Sent: Tuesday, May 01, 2007 1:46 PM
  Subject: Re: [NSRCA-discussion] Odyssey CG


  Dr. Harrison,
  Thank you very much for the information! I agree with you completely that the CG is pilot specific. I tend to like my planes just a hair tail heavy compared to others. What I was afraid of was having the CG so out of whack that the plane would not survive its maiden flight.

  I know that 30% is the rule of thumb and I wanted to make sure that applies to the Odyssey. Just to summarize and for example, If I am looking at the wing root of one panel and the chord is 10 inches, I wand to start with the CG roughly three inches from the leading edge at the root (fuselage)?

  I will follow that and let you know how it turns out.

  Is there anything else I should know about the Odyssey?

  Thanks again
  Anthony

  "Dr. Mike Harrison" <drmikedds at sbcglobal.net> wrote:
    Anthony,

    I designed the Odyssey and I can't tell you where it is, but I can recommend some guidelines.  First, however let me give some opinion as to the value of cg location.  I believe the optimum cg location is pilot sensitive, that is to say different flyers prefer different cg's based on how the plane is set up.  For that reason I recommend a range that is easy to find then fly the airplane and change the cg until you like the way it flies.  Some points to remember are to fly full speed then cut the throttle, the plane should descend very slowly.  If it descends rapidly, then it is nose heavy.  If it climbs, it is tail heavy.  That will get you close.  After that make very small changes to suit your style.  On your root rib mark from 28 to 32 percent of the rib.  That would be a recommended range.  You might start at 30% and work from there.  The stab is powerful on the Odyssey and requires expo for best results so don't confuse a powerful elevator as tail heavy.  

    Good luck
    Mike
      ----- Original Message ----- 
      From: Anthony Abdullah 
      To: NSRCA Mailing List 
      Sent: Monday, April 30, 2007 12:38 PM
      Subject: [NSRCA-discussion] Odyssey CG


      Does anyone know where the CG should be on the Odyssey?

      TIA
      Anthony

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