Wing Mounting; Aligning The Wing; Installing The Blind Nuts - Model Tech Extra 300 Instructions For Final Assembly

brace. Make sure to cover the top and bottom as well
as the sides, and use enough epoxy to fill any gaps.
7) Slide the dihedral brace into the plywood box
up to the centerline. Remove any excess epoxy be-
fore it dries using a paper towel and rubbing alcohol.
Allow the epoxy to cure before proceeding.
8) Once the epoxy has cured, trial fit both wing
halves together to double check that the wing halves
still fit correctly.
9) Mix a generous amount of Kwik Bond 30
Minute Epoxy. Apply a thin layer of epoxy to the
exposed half of the dihedral brace, the inside of the
plywood box in the second wing half and the entire
surface of both root ribs. Make sure to use enough
epoxy to fill any gaps.
10) Slide the two wing halves together and care-
fully align them at the leading and trailing edges.
Wipe away any excess epoxy using a paper towel
and rubbing alcohol. Use masking tape to hold the
two wing halves in place until the epoxy cures. See
photo # 3 below.
Photo # 3
Masking
Tape
11) When the epoxy has fully cured, double check
the center section joint. If any gaps are present, mix
a small amount of Kwik Bond 30 Minute Epoxy and
carefully fill any remaining gaps. Allow the epoxy
to fully cure before proceeding.
PARTS REQUIRED
{1} Fuselage
{1} Wing Bolt Doubler W-25
{2} 3mm x 25mm Machine Screws
{2} 3mm Flat Washers
{2} 3mm Blind Nuts

ALIGNING THE WING

1) Place the wing into the wing saddle making
sure that the two preinstalled dowels in the leading
edge of the wing fully engage the predrilled holes in
the forward bulkhead in the fuselage. Push the wing
as far forward as possible. The center of the leading
edge should fit tight up against the bulkhead.
2) Using a ruler and a pen, measure and place a
mark on the centerline of the bottom of the fuselage
at the rear of the wing saddle. Also measure and place
a mark at the centerline of the wing at the trailing
edge.
3) With the wing in the wing saddle, align the
two centerline marks and hold the wing securely in
place using a couple of pieces of masking tape. See
photo # 4 below.
Photo # 4
Fuselage
Centerline
Wing
Centerline
4) Remove the ailerons from the wing. To
double check that the wing is square to the fuselage,
use a ruler and measure from each wing tip to the rear
edge of the fuselage. Both measurements should be
equal. See figure # 1 below.
Figure # 1
A

INSTALLING THE BLIND NUTS

5) When satisfied with the alignment of the wing
to the fuselage, hold the wing firmly in place and use
a 1/8" drill bit and drill two holes through the wing
and on through the plywood wing hold down block
inside the fuselage. The two holes should be located
1" out from the centerline of the wing and 1/2" for-
ward of the trailing edge.
6) Remove the wing from the wing saddle. Drill
out only the holes in the plywood wing hold down
block using a 5/32" drill bit.
6
A1