Install The Engines - GREAT PLANES Profile 38 Instruction Manual

If You Do Not Have A Slot Machine
Cut the hinge slots in the rudder and fin using a hobby
knife with a #11 blade. Mark the centerline of the rudder
leading edge and the fin trailing edge. 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 hinges.
4. Cut the 3/4" x 1" [19mm x 25mm] hinges for the rudder
from the supplied 2" x 9" [51mm x 229mm] hinge material.
Then, snip off the corners as shown on the wing plan.
Temporarily join the rudder to the fin with the hinges,
adjusting any hinge slots if necessary so they all align. Do
not glue in the hinges until you are instructed to do so
after the airplane is covered.
5. With the rudder temporarily attached to the fin, round
the leading edge of fin and the trailing edge of the rudder.
6. Refer to the Expert Tip that follows and shape the
leading edge of the rudder to a "V" 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 pen to mark a "bevel to" line on both
sides, about 3/32" [2mm] high.
Note: You will probably have to adjust the height of the rudder
with card stock so your "bevel to" line is not too high.
B. Using the "bevel to" lines and the centerline as a guide,
make the "V" on the leading edge of the rudder with a
razor plane or the Great Planes Multi-Sander (GPMR6190)
with 150-grit sandpaper.
7. Return to step 1 and temporarily attach the second rudder.
8. Repeat the process to hinge and make a "V" on the
elevator and stabilizer.

INSTALL THE ENGINES

It is much easier to temporarily mount the engines now,
before the booms are permanently attached to the wing.
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