Top Flite Sierra 40 Trainer Kit - Manual (Page 20)

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the dihedral braces. For your reference, if one
wing panel is resting flat on the table, the other
wing tip should be approximately 4" off the table.
32. Look ahead to the photos with steps 33 and
34 for a view of the joined wing. Spread a layer of 15-
minute epoxy onto the matching surfaces of the
dihedral braces and the LEFT wing panel spars.
Align the dihedral braces with the top and bottom
edges of the spars. Clamp or tape the braces in
position until the glue sets.
NOTE: If there are any small gaps between the
ends of the spars or LE's or TE's, do not be
overly concerned. They will not significantly
weaken the structure. After the wing joining
process is complete, fill them with scrap balsa
and medium CA glue.
33. When the epoxy is set, apply a thin film of
epoxy to the dihedral brace and the right wing
spars, slide the two wing panels together, and
carefully align the spars with the dihedral braces.
After the epoxy is cured, if any of the dihedral brace
joints do not appear to be thoroughly glued, apply an
extra fillet of epoxy to them.
34. The die-cut 1 /8" plywood forward center brace
(F) is glued in next. It should be centered on the
leading edge so the 1/16" balsa top and bottom
center sheeting will lap onto it. Align the left and right
leading edges and glue the brace in place with CA or
epoxy.
35. The die-cut 1 /8" plywood aft center brace (A)
is centered on the trailing edges. Align the left and
right trailing edges and glue the brace in with CA or
epoxy (if you are building the 3-channel version, the
fixed aileron stock should be aligned and glued
together at this time).
NOTE: If you are building the 3-channel version,
do not punch out the cutout for the aileron servo
in R-1C. Instead, glue it permanently in place.
Punch it out as shown in the photo at the top of
the next column for the 4-channel version.
together to form a 1/4" thick part. Glue the two die-
cut 1/8" R-1C's (1C) together to form a 1/4" thick
part.
two lines forward from the slot in R-1A as shown in
the photo, for later reference.
centered to allow for the top and bottom center
section sheeting as shown in the cross-section
drawing beside the right wing panel.
36. Glue the two die-cut 1/8" balsa R-1A's (1A)
37. If you are using the bolt-on wing option, draw
38. Use medium CA to glue R-1C in place. It is
39. Put R-1A in place as shown in the cross