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8.
Roughen the outside of the two pieces of 5 mm
aluminum tubing that serve as wing joiner
bushings. Trial fit them through R9 and into R8
for each end of the center section, then use either
epoxy or medium CA to secure them in place.
Pay attention to not allow any adhesive into the
tubes and make sure that you get the outside
ends flush with R9.
9.
Locate four of the thin triangular pieces (see Fig.
23). They are braces for the joiner tubes. Glue
one on top of the tube and one on the bottom,
against the tube.
Wing Hold Down Support & Top Sheeting
1.
Now dig out two of the four pieces of 2 mm (~1/16”) x ~57 mm (~2-1/4”) pieces of
carbon fiber rod and use medium CA to install them in
the rear of R9 – R8. (See plans)
2.
Locate the 60 mm (~2-3/8”) piece of trailing edge
stock and the matching piece of 3 mm (~1/8”) ply
with the hole in it. These will become your wing hold
down block. Glue the triangle stock against the
trailing edge making certain that it is pressed solidly
against the bottom center piece.
3.
Use medium CA or aliphatic glue to glue the plywood
piece in place. Weigh it down as it dries.
4.
Install the four triangular gussets outboard of the R1
ribs and inboard of the R9’s, as shown on the plans.
5.
Inspect one last time to see that all parts have been
installed and are securely glued.
Figure 22: Joiner Tube and CF Reinforcement
Figure 23: Joiner Tube Braces
Figure 24: Wing Hold-Down Parts w/o Spoiler Box