Re: Geodetic Wing - Follow Up

From: <RLBailey_at_care4free.net>
Date: Tue, 30 Oct 2007 12:32:32 -0000

The wing you describe will be considerably stiffer torsionally than one with straight ribs and you can use smaller spars. We used to use this construction which is Warren girder, not geodetic (X construction) on F1L and found that much stiffer spars are needed with straight ribs.

Bob

  ----- Original Message -----
  From: calgoddard
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Monday, October 29, 2007 6:14 PM
  Subject: [Indoor_Construction] Geodetic Wing - Follow Up


  Our team tested the airplane it built with the geodetic wing that
  resulted in unexpectedly high camber.

  The plane flew very well with the geodetic wing.

  Now our team needs to test the same plane with a similar non-geodetic
  wing to see which is better.

  Of course they need to maintain everything else the same - overall
  weight, CG, prop, rubber, turns and torque. Many test flights will be
  needed to see if they can discern a difference. They might use half
  motors to speed up the testing.

  Maybe at such low speeds the main wing camber is not that important,
  i.e. it is outweighed by many other factors, so long as the camber is
  in a reasonable (suitable) range.

  As always, comments from the group are appreciated.



   

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Received on Tue Oct 30 2007 - 05:32:44 CET