I have sat the centre spars in the fuse for the first time, and they fit
very well, excepting the rear spar, the inner edges of the vertical members
fore and aft of this spare are closer than the outer edges, there is a lot of
bending in the side frame here, I would think the only way to get it to fit
will be to chamfer slightly the vertical members. What do most people do to
solve this?
And I guess by now someone is saying if the hole is not big enough, how do
you get the spar to sit in the fuselage? Both spars only have ply on the front
face only at this stage, and the gap left is not enough for the other layer of
ply, I am sure other people must have come across this problem, what does
everyone do to solve this? If I look at the spars from the front and line up
the top and bottom edges, they are out of parallel at the spar ends by about
1/32 inch, just sitting in the fuse, and if I measure the inter spar distance
parallel to the aeroplane longitudinal axis, then at the spar ends I get 20
something and 7/10 inch on one side, and the other side gives the same 20
something and 8/10 inch, so the centre section and fuselage frames must be
reasonably alighned, otherwise the spars would point in different directions.
Chris Johnston
North Richmond
NSW Australia.
