Great Planes Extra 300S 60 Kit - GPMA0236 - Manual (Page 32)

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6. Cut a 1/8" x 1/8" x 36" balsa stick in half making two
turtle deck bottom stringers. Glue them to the fuse top
leaving a 3/32" space between the outer edge of the fuse side
and the stringer. Hint: Using a leftover piece of 3/32" balsa as
a spacer to locate the stringer makes this step easier.
❏ 7. Edge glue two 3/32" x 3" x 18" balsa sheets together,
making a 6" x 18" sheet. Cut the two turtle deck sheets
using the template on the fuse plan as a guide.
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8. Sand a taper on the top rear 5" of the sheeting.
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9. Glue the bottom edge of the sheeting to the fuse top
and the bottom stringer. Wet the outside of the sheeting,
then bend and glue the sheeting to the turtle deck formers,
turtle deck top stringers and the fin.
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10. Using your sanding block, sand the top edges of the
sheeting so the top stringer will have a good gluing surface
when it is glued in place.
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11. Glue the 3/8" x 3/8" x 12" balsa top stringer in place.
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12. Shape the top stringer to the shape shown on the plans.
❏ 1. Cut the “spreader bar” from the supplied Great Planes
engine mount, then use a hobby knife to remove any
flashing left over from the molding process so the halves fit
together well.
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2. Temporarily bolt the engine mount to the firewall with
four 8-32 x 1-1/4" socket head bolts and #8 flat washers.
Do not tighten the bolts all the way, because you still need
to adjust the mount.
❏ 3. Place your engine on the mount and slide the halves
in or out until the engine fits properly. Position the mount so
the molded-in “tick marks” are equally spaced on the
horizontal centerline you drew connecting the punch marks
on both sides of the firewall. When the engine mount is
adjusted and positioned, tighten the mounting screws.
Mount the Engine & Tank Tray
32