GREAT PLANES ElectriCub Instruction Manual page 23

14. Trial fit the aft deck base and formers on the fuse. At
each former, make sure the deck base seats completely on
the top longeron. Lightly sand the bottom of the formers
as needed.
15. Glue the aft deck base to the top edge of former F-3.
While applying pressure on the aft deck base at F-4, glue
the top longeron to the aft deck base at F-4. Repeat the
process at F-5 and F-6. Then, proceed to glue the top
longeron to the rest of the aft deck base.
16. Again, check that the tail post is perpendicular to the
building board (when viewed from the rear). Glue the middle
longerons to the formers. Temporarily apply weight to the aft
deck base so that F-4, F-5 and F-6 are against the building
board. Glue the bottom longerons to the formers.
17. Turn the fuse upside-down and apply glue along the
joints between the aft deck base and F-4, F-5 and F-6.
18. Carefully sand the bottom of the fuse flat.
19. Glue the die-cut 1/8" plywood battery bench back
and the die-cut 3/32" balsa battery bench seat to the
battery bench supports.
20. Position the fuse upside-down on your building board.
Check that the tail post is perpendicular to the building
board (when viewed from the rear). Sheet the bottom of the
fuse with 1/16" x 3" x 30" balsa sheet, applied cross-grain,
starting at the rear edge of the landing gear plate opening
and proceeding to the tail post. Note: A good way to do this
is to lay the sheet across the fuselage and mark the edge of
the longerons on the bottom of the sheet Remove the sheet
and cut along the mark with a hobby knife, allowing a little
extra that will be sanded off later.
21. Use a sanding block to sand the bottom sheeting flush
with the sides of the fuse.
22. Using epoxy, glue the die-cut 1/8" plywood F-1B to the
back of F-1A. This is now called the firewall. Remember, the
side with the embossed "1A" and "1B" is the front of the firewall.
23. After the epoxy cures, drill 3/32" pilot holes through
the firewall at each of the eight punch marks.
24. Make a mark 3/32" from one front corner of the die-cut
3/32" balsa front deck base. Trim the end of the front deck
base at an angle to allow for the right thrust in the firewall.
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