All of the spar webs have been installed except for the first two rib bays where the wing tube resides. The top trailing edge sheet and the sub-leading
edge have been glued on.
The right wing panel is completed except for the LE and plywood root cap. The small hole behind
the wing spar tube will be tapped for a 10-32 nylon screw.
Install all of the spar webs outside of
rib #3, making sure the grain is vertical.
Cut a piece of 11/32 OD brass tube to fit,
scuff the outside with sandpaper, and
glue it to ribs #1 through #3. Install the
hard balsa fill-ins above and below the
brass tube using CA+.
Remove the wing panel from the
building board. Add the 1/32 plywood
webs between ribs #1 and #3. Sand
the bottom edge of the sub LE to the
proper angle flush with the edges of the
ribs (protect the ribs with masking tape
while sanding). Glue the 1/8 square balsa
pieces to inside edges of rib #11 on the
top and bottom. Glue the bottom 1/16
D-tube sheet on. The sheet only goes
back to the center of the bottom spar
cap, not the aft edge.
Put the wing back onto the building
board with scrap 1/16 balsa shims under
each rib tab. Pin the ribs at each tab and
use pin clamps or something similar to
hold the wing down along the lower
spar cap. Cut and fit the top 1/16 D-tube
sheet so there is roughly 1/16 inch of
overhang at the sub LE, and make sure
it is straight along the spar. Again, the
sheet only goes back to the center of the
top spar cap, not the aft edge.
Mark the center of the top spar cap at
each end. Now glue on the top D-tube
sheet using the following process.
Apply aliphatic resin glue (Titebond,
Sig Bond, or other) along the top of
MYS 5 Model Aviation JANUARY 2015 www.ModelAviation.com
