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Old 02-22-2008 | 05:31 PM
  #768  
F-4
 
Joined: Nov 2005
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From: St. Louis, MO
Default RE: Impact

Tom,

Thanks for your detailed response. Decided to post my response as I think my issues are significant. I did build a flat table and am using with threaded rod system as you described. Actually got the idea from a post on this thread. Do have Bob Noll's CD and use his methods.

Milled all fuse holes per manual. Established vertical and tightened fuse to board/jig. Started with the stab spar. Got it dead on, level and square to fuse. Epoxied fuse tube. Mistake #1. Put stabs on and measured. Way off. "Honed" stab fuse tube until stabs were square. Of course, lost tight spar fit. Filled void with epoxy. Stab is now not removable. OK, on to wing. Centered and leveled wing spar. Wing spar is now level to stab and 90 deg. to fuse long axis. Tacked wing spar tube. Slipped on wings and checked level, incidence and 90 deg. Wings were level BUT, incidence was a neg 2 deg. and difference between right and left wing tips to tail post was 1/2inch! Had to elongate anti-rotation holes 1/4" to get to positive incidence. Right wing was forward of left and there was a 5/32" gap between right wing trailing edge and fuse. After multiple rechecks of measurements, determined that the right wing tube was the problem...not where it needed to be. At this point frustration set in and I sent my last post.

After much thought, I decided to rework the spar holes to change the angle through the fuse. This moved the left side of spar forward and right side back. That should "square" the wings. Of course, I now have wing gaps to fix. After many fit, mark, remove and sand iterations, the fit is okay and wing tips to tail post measurements are the same. One more check and I will spot epoxy the fuse spar tube and, hopefully, move on.

I have read each and every post in this thread and can not recall any complaints about the major issues I have experienced. Don't know if my kit was that bad or my expectations are just not realistic.

John