Great Planes Gee Bee Profile 40 Kit - GPMA0485 - Manual (Page 7)

CUT HINGE SLOT
WITH HOBBY KNIFE
AND #11 BLADE
D 3. Cut the hinge slots in the rudder using a #11 blade.
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.
D 4. Cut the 3/4" x 1" hinges for the rudder from the
supplied 2" x 9" hinge material. Use the hinge drawing on
the plan as a guide. Test fit the hinges into the rudder. Do
not glue the hinges at this time.
HOW TO CUT A GROOVE
A. Use a hobby knife to sharpen the inside of a piece of
1/8" brass tube. Roll the tube as you carve the end.
B. Use the sharpened tube to carefully gouge the leading
edge. You'll have to make several passes to make the
recess deep enough for the tailgear bearing.
D 5. Position the rudder over the plan and align the
tailgear assembly over the rudder. Mark the tailgear "arm"
location on the LE of the rudder. Drill a 7/64" hole, 3/4"
deep at the mark.
D 6. Cut a groove from the above hole to the bottom of the
rudder that will allow the nylon tailgear bearing to fit flush
with the LE of the rudder (see the following expert tip). Do
not glue the tailgear bearing in position at this time.
D 1. Refer to the Expert Tip that follows and shape the LE
of the rudder to a "V" shape as shown on the plan.
HOW TO BEVEL THE LEADING EDGE
A. Place the leading edge of the rudder on your work
surface and use your ballpoint pen to mark a "bevel to" line
on both sides about 1/8" high.