Great Planes Ultra Sport 60 Kit - GPMA0420 Pages 1-27 - Manual (Page 20)

3. Accurately position the two pre-cut 1/4" x 1/2" balsa
cross-braces on the plan, and pin them in place behind F-4
and F-5. Note: The front cross-brace (at F-4) extends only
out to the doublers.
the plan and hold it securely in place with pins, tape or
weights (or you may spray it lightly with 3M "77" spray
adhesive, to hold it firmly but temporarily down on the plan).
7. Trial fit (do not glue) the following parts together
Fuse top, fuse sides, die-cut 1/8" ply F-2. F-3, F-4 and the
die-cut 1/8" ply Chin Block Base. Check the fit of all parts
and trim, file or sand as necessary for a good fit. Pull the aft
ends together and re-sand the 1/4" triangles if necessary.
4. Trial fit formers F-4 and F-5 to the front of the Cross-
braces (the formers are upside down), and sand the edges of
the formers slightly to match the angle of the fuse sides. Glue
the formers to the cross-braces, making sure that each
former is installed perpendicular to the building surface.
8. Once you have everything fitting properly, re-as-
semble the above parts, using clamps, pins. tape and weights
to hold everything together and flat on the workbench. Make
sure F-2 is pushed as far forward as possible, and F-4 is
pushed as far aft as possible. There should be waxed paper
underneath to prevent gluing the fuse to the plan. Apply thin
CA glue to the joints, then follow with thick CA glue in any
joints that are not tight fitting.
5, Insert F-6 upside down in the rear of the slot in the
stab base. Sand the edges of F-6 slightly to match the angle
of the fuse sides. Align F-6 perpendicular to the stab base and
glue it in place.
glue, and to provide a flat surface for the sheeting.
9. Sand the bottom of the fuse to remove any excess
6. Accurately position the 1/8" die-cut ply fuse top on
pieces of cross-grain sheeting to the bottom of the fuse,
beginning at the front of F-4 and running to the aft end of the
fuse.
11. Now you may remove the fuselage from the work
surface and sand the edges of the bottom sheeting flush with
the fuse sides.
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