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Old 01-17-2008 | 11:25 PM
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iron eagel's Avatar
iron eagel
 
Joined: Jul 2004
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From: Middleboro, MA
Default RE: Yet another Sig Something Extra Build

Bob sorry to hear about that hope the engine survived...
Looks like no fly weekend for us, that is, unless your into some wind chill....

Well finally got back to building tonight and as I was waiting for the fuselage side doublers to dry I started to read through the manual again. Every time I got to pg 13 and read step 48 I got a bit more concerned. The reason for that is if there is any problem with the relationship of the wing panel roots to the fuselage that must mean that something is out of square. Since the wing panels are built on the plans lets assume for a moment they are square, so what does that leave? That only leaves the fuselage itself as the issue any misalignment of the formers and you’re going to have one side or the other out of line and that will skew the fuselage sides making the wing tube no longer 90 deg. to the fuse, and create a problem with where the root meets the fuselage. Now by the looks of it only the formers and the servo tray serve as the means to keep the fuselage sides in the proper orientation to each other.
Given that we are working with wood and it is not an absolute perfect medium how much of an issue is this?
Am I being overly concerned with something that is not that big or common of a problem? I notice that they make no mention of what you can do to correct the problem in the manual, and I have read of others using fillers sanded to shape when they encountered this problem.
But my trying to think ahead has come up with a whole myriad of problem this can cause down the line up to an including having a twist in the fuselage as you build up the tail by adding formers and the top and bottom. From what I see they look at the components and there installation as being the thing that keeps the fuselage square and straight. As a matter of fact I recall that when I built the lt-40 for my wife this was the case. During the course of that build you assembled the fuse with rubber bands and tape and did not glue it till all of the components were in place and it had been checked for being straight and true. After all of the stick building I have done, this seems to be a bit of a leap of faith as far as building the plane and wonder if it is a real issue, or as usual I am getting stressed over a very minor detail.