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Old 03-09-2008 | 08:05 PM
  #28  
da Rock
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From: Near Pfafftown NC
Default RE: All flying tailplane

ORIGINAL: quentinmayberry

I understand this is difficult to explain without actually seeing, but why would I not want to move the pivot point up to the green circle as opposed to keeping it below as the original?

I have highlighted the top of the jet tube in red, it is really close to the servo and the designed attachment method (two bolts) almost touch it.

I agree Dick, I don't like it either!
Changing the design is a great idea. But there is a fairly good reason to not move it to the location you indicate with the green circle if you wish the pivot to be slightly ahead of .25C MAC. Because that's nowhere near .25C MAC.

If you look closely at Tall Paul's pictures, see the two CF spars. One of them would be better for the new pivot location as it points almost exactly ahead, but close to the 25% location on the MAC.