Great Planes Extra 300S 40 Kit - GPMA0235 - Manual (Page 21)

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6. Drill a 3/16" hole through each of the punch marks in
formers F-2B, F-3, F-4 and F-5.
Hint: Place the formers on a leftover piece of wood and
press down as you drill the hole so the wood does not split
when the drill goes through.
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7. Draw centerlines connecting the outer punch marks
on the firewall. Drill 5/32" holes for the engine mount bolts
at the four engine mount punch marks. Drill 7/32" holes at
the fuel line punch marks for the Great Planes 10 oz. fuel
tank. If you will be using a fuel tank or engine mount other
than Great Planes do not drill the holes in the firewall for
the fuel lines until later on in the fuselage construction after
the engine is mounted and you have your fuel tank.
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8. Press four supplied 6-32 blind nuts into the holes on
back of the engine mount. Gently tap the blind nuts with a
hammer to fully seat them into the firewall, then add a few
drops of thin CA around each blind nut to secure them.
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9. Place former F-5 over the cross section drawing of
F-5 on the plan. Use a ballpoint pen to accurately transfer
the marks on the plan that indicate the ends of the turtle
deck stringers onto F-5.
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10. Fit the fuselage sides together, then place three
rubber bands around them. Without using any glue insert
the firewall and formers F-2B and F-3 between the fuselage
sides in their prospective locations.
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11. Install the aft fuselage top, then formers F-4 and
F-5, the aft fuselage bottom, then the stab base. Add
rubber bands as needed.
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12. Use a ballpoint pen and a straightedge to draw a line
connecting the punchmarks at the aft edge of the opening
on the forward fuselage top, then remove the shaded
area shown. Mark the “R” and “L” on the fuse top as shown
in the photo.
The interlocking construction of Great Planes kits allows
you to quickly assemble the fuselage while maintaining
alignment. You will be fitting nearly all of the die-cut
fuselage parts together before applying glue. Do not use
any glue until instructed to do so.
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