Great Planes F4 Phantom - GPMA0440 - Manual (Page 25)

3. Build a pair of fuse doublers by gluing together the
die-cut 1/8" balsa upper and lower forward fuse doublers
together. Glue the die-cut 1/8" ply upper and lower aft
fuse doublers together.
4. Position the fuse sides next to each other as shown.
Important: Install all the plywood formers with the
embossed lettering facing the front of the plane.
1. Glue 1/2" balsa triangle sticks, flush with the top and
bottom of the doubler, from the front edge of the fuse side
to the wing saddle on the bottom and past the edge of the
doubler on the top.
2. Sand the aft ends of the triangle sticks flush with
the fuse sides.
Glue the forward fuse doublers to the fuse sides, aligning
the edges of the wing saddle and the forward top edges
only. Glue the aft fuse doublers to the fuse sides, aligning
with only the wing saddle.
5. Glue the die-cut 1/8" balsa tail fuse side to the fuse
3. Drill 3/16" holes at the punch marks on the die-cut
1/8" ply formers F-3, F-4, F-5 and F-6.
doubler. Align the top edges only. This will create a gap
between the upper aft fuse side and the tail fuse side.
fuse doubler (see photo above).
7. Trim 1/8" from the front of the right fuse side only.
This will set right thrust for the firewall.
4. Insert formers F-4, F-5 and F-7 into their appropriate
slots in the fuse sides. Carefully rotate the formers in the
slots to lock them in place. Do not glue the formers yet.
6. Sand off the forward tail fuse side flush with the aft
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