Great Planes PT-60 Kit - GPMA0119 - Manual (Page 10)

paper under the part to raise the mark to the same level
as the pen's point. If the pen is too low, raise it with
paper shims (or playing cards) to the right height.
C. Now, depending on which is shimmed (the part or the
pen), rotate the un-shimmed component around the
perimeter to draw the line.
the flow of CA to the back of the hinges. This results in
hinges that are only "tack glued" approximately 1/8" to
1/4" into the hinge slots. The following technique has been
developed to help ensure thorough and secure gluing.
D 6. With reference to the above sketch, cut 18 hinges
from the supplied 2" x 9" composite hinge material and cut
the corners as shown. You will need five hinges for the
elevator and four for the rudder. Store the remaining hinges
for use later during construction.
D 7. Separate the elevator and rudder from the stab and
fin. Draw a centerline on the TE of the stab and the LE of
the elevator. Do the same for the fin and rudder.
D 8. Use the plans as a guide to mark the locations of the
hinges on all tail components-fin, rudder, stab, and
elevator. Refer to the Expert Tip that follows, then cut
matching hinge slits in all four parts.
A. Cut the hinge slot using a #11 blade in a standard #1
knife handle. Begin by carefully cutting a very shallow
slit at the hinge location. This first cut is to establish your
cut in the right place, so concentrate on staying on the
centerline and don't cut too deep! Make three of four
more cuts in the same line, going slightly deeper each
time. As you make these additional cuts, work on going
straight into the wood. Continue this process while
"wiggling" the knife handle forward and backward until
the blade has reached the proper depth for the hinge.
The hinge material supplied in this kit consists of a
3-layer lamination of mylar and polyester. It is specially
made for the purpose of hinging model airplane control
surfaces. Properly installed, this type of hinge provides
the best combination of strength, durability and ease of
installation. We trust even our best show models to
these hinges, but it is essential to install them
correctly. Please read the following instructions and
follow them carefully to obtain the best results. These
instructions may be used to effectively install any of the
various brands of CA hinges.
The most common mistake made by modelers when
installing this type of hinge is not applying a sufficient
amount of glue to fully secure the hinge over its entire
surface area; or, the hinge slots are very tight, restricting
B. Drill a 3/32" hole, 1/2" deep, in the center of the
hinge slot. If you use a Dremel Moto-Tool® for this task, it
will result in a cleaner hole than if you use a slower speed
power or hand drill. Drilling the hole will twist some of the
wood fibers into the slot, making it difficult to insert the
hinge, so you should reinsert the knife blade, working it
back and forth a few times to clean out the slot.
C. Trial fit the hinges into the slots and temporarily
attach the control surface, to verify the fit and operation.
IMPORTANT: DO NOT GLUE THE HINGES IN PLACE
UNTIL THE MODEL IS COVERED! YOU WILL BE
INSTRUCTED WHEN TO GLUE THE HINGES.
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