Great Planes Ultra Sport 40 Kit - GPMA0410 - Manual (Page 7)

4. Working on a flat surface covered with waxed
paper, glue the fin front to the fin rear, then glue on the
fin tip. Sand the front of the fin tip to blend with the fin.
as shown on the plan.
10. If you are building a "taildragger", check the
plans and mark the location of the tailgear on the rudder.
Drill a 7/64" hole in the rudder, and groove the rudder
leading edge to accept the tailgear wire and the nylon
tailgear bearing.
5. Using a T-bar or sanding block, sand both sides
of the fin smooth. Then sand the leading edge and top
edge to a rounded shape, as shown on the plan. Draw a
centerline along the trailing edge of the fin to mark the
hinge line.
BUILD THE STABILIZER AND
ELEVATORS
6. Glue the rudder front to the rudder rear, then
glue on the rudder bottom and rudder end.
7. Draw a centerline all around the edges of the
rudder (This will help to maintain symmetry when
sanding).
1. Find the following parts: 1/4" balsa stab front,
stab rear and elevators. You'll also need the 1/4" stab
tips and 1/8" elevator ends that you previously cut, and
the 1/8" wire elevator joiner.
8. Using a sanding block and coarse (50 or 80-grit)
sandpaper, sand both sides of the rudder to a taper as
shown on the plans. The trailing edge should end up
approximately 3/32" wide and have a rounded shape.
(Do not sand to a sharp edge). Sand the bottom edge to
a rounded shape. Sand the leading edge to a' 'V-shape''
as shown on the plan.
2. Glue the stab front to the stab rear. Then glue
on the stab tips. Sand the front of the stab tips to blend
with the stab.
3. Glue the elevator ends to the elevators and sand
to blend.
9. Hold the fin and rudder together and mark the fin
tip at the rudder trailing edge. Cut off the fin tip and sand
it to match the rudder as shown on the plan.
4. Sand both sides of the stab smooth, then sand the
leading edge and tips to a rounded shape. (Leave the
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