GREAT PLANES RV-4 Instruction Manual page 8

9. Cut the 1/4" x 1/4" x 30" [6 x 6 x 750mm] balsa sticks
to size as shown on the plan. Then glue them in place to
form the elevator inner structure.
10. Remove the parts from the plan. Sand the control
surfaces smooth and shape the L.E. of the stab and the T.E.
of the two elevator halves to match the cross section shown
on the plan. Do not shape the L.E. of the two elevator halves.
11. Locate the center of the T.E. of the stab. Place a T-pin
on the center at each end of the stab. Lay a straight edge
against the pins and draw a center line on the T.E of the
stab. Repeat this procedure for each elevator half.
12. Using the plans as your reference, mark the location
for the hinges on the T.E. of the stab and the L.E. of the two
elevator halves.
CUT HINGE SLOT
WITH HOBBY KNIFE
AND #11 BLADE
13. Cut the hinge slot in the stab and elevator using a #11
blade inserted in your hobby knife. Begin by carefully cutting a
very shallow slit at the hinge location to accurately establish the
hinge slot. Make three or four more cuts, going a little deeper
each time. As you cut, slide the knife from side to side until the
slot has reached the proper depth and width for the hinge.
DRILL A 3/32" HOLE
1/2" DEEP, IN CENTER
OF HINGE SLOT
14. Drill a 3/32" [2.4mm] hole 1/2" [13mm] deep in the center
of the hinge slot. This will help the glue to better saturate the
hinge and the wood when the hinges are installed.
If you are like most modelers, cutting slots for the hinges is
time consuming and tedious. A really great time saver and
accurate tool to make this job very simple is the Great Planes
Slot Machine. This tool is available in a corded 110V AC.
(GPMR4010) as well as a cordless version (GPMR4011).
With this tool you can cut hinge slots in a matter of seconds.
1. After marking the location for the hinge, place the edge of
the cutting blade on the mark and use a little pressure to set
the teeth into the wood.
2. Squeeze the trigger on the Slot Machine and the teeth will
cut a perfectly sized width and depth for today's CA type
hinges. Optional blades (GPMR4016) are available to cut
slots for the nylon type hinges as well.
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