Carl Goldberg Products EXTRA 300, Instruction Manual

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3.
■ ■
Using the centerline tool, scribe the centerline onto the
rudder post, the fin post, the hinge line of the stabilizer,
and onto both elevators
4.
■ ■
Carefuly cut a slot approximately 1/2” deep and slightly
wider than the hinge, using your favorite knife blade.
5.
■ ■
After all slots have been made, mark the center of your
hinge and insert a pin (see illus.) This will hold the
hinge in place while sliding the matching part (aileron,
etc.) onto the JET HINGE.
DO NOT GLUE!
■ ■
With both surfaces hinged and assembled, check the
alignment. For good control response, the hinge gap
should be as small as possible, but s h o u l d
allow for full deflection when needed.
Remove the hinges.
6.
■ ■
Assemble the two bevel tools and install a strip of
medium grit sandpaper, as shown.
7.
■ ■
Using the tool marked “R,” bevel the rudder-side of the
hingeline to a point at the centerline. You may want to
bevel near the air balance with a knife, if you can’t use
the tool in the corner.
■ ■
Using the tool marked “AE,” bevel the elevators to a
point at the centerline.
8.
■ ■
Temporarily hinge the rudder/fin and the stab/elevators
to check the surface alignment and to round the
perimeter of the assemblies.