AerodromeRC aviatik 30.40 User Instructions page 4

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Note the notch in the ends of the spars shown on the right
wing tip plan. Cut the spars to fit the plan. Pin the 3/8"
front spar to the plan. Pin down the 1/4" spar, but alter the
splice joint to the opposite wing half, thereby not having
both splice joints in the same wing half.
Pin down R6 wing tips, R10 and 11 center section and R9
1/32" ply trailing edge pieces. R9a aileron trailing edge can
be done now or le� till later when assembling the ailerons.
The 1/4" square balsa leading edge can not be put on until
the rest of the wing is finished. The wing needs to be li�ed
off the plans as the 1/4" square extends below the flat
bo�om. If you choose to use the scrap sheet, you will have
to make a splice joint in the same manner as the spars.
Now we can assemble the wing ribs. This builder likes
to start at the center "R1" and work out to the wing tip,
Copyright© 2010 M.K.Bengtson All Rights Reserved Rev 07/11
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pu�ing in each rib on the le� then right. Ribs R2a, R2b
and R3 can be preassembled. Careful to get R2b and R3
in correct location. This builder glued them as he came to
them. "T.E." can be pinned down or le� until the ribs are in
place. A�er all ribs are in place, R8 can be glued in place to
complete the trailing edge. Later when the wing is off the
building board, scrap 1/16" sheet can be glued under R8 to
fill in the li�le points or le� as is and covered.
The ailerons are very simple. Pin "L.E." in position and
add R7, leaving a gap next to the 1/8" R3 rib. Pin and glue
R5a in position then add the R4a ribs. The small "m" piece
is added so that later the control horn can be glued in
a�er covering. Finish off by adding the 1/32" ply R8a. The
aileron can be finished in two ways. Chamfer both T.E. and
L.E., and hinge at the top or as this builder did, sand a half
round on the L.E. and put the hinges on the center line.
Remove the wing and ailerons from the board and glue the
1/4" square balsa leading edge on. Hang the wing over the
edge of the board and weight it down while the glue dries.
This will ensure a straight leading edge.
Find the two 1/32" ply servo covers. Cut 4 pieces of 1/4"
square scrap balsa and glue them across the forth rib bay
from the tip. They can be even with the ribs R4 so that the
cover will set on the surface. This builder chose to recess
the servo plate and use scrap bass wood so that a 4-40
screws can be used to hold the plate in.