Great Planes Super Sportster 40 MkII Kit - GPMA0205 - Manual (Page 29)

K & B paints are not difficult to use if you have spray
equipment or an airbrush Use equal parts of the mixed
color paint (Part A) and gloss hardener (Part B),then stir
well Use about 1/3rd of the total volume of parts A and B
combined of K & B thinner Remember to use an approved
respirator or mask
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, a
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
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
We have found that it's much simpler to do all hinging and
control horn installation after the model is covered
Note: Refer to the fuse plan for the hinge making
instructions Cut 15 hinges from the 2" x 9" supplied material
D 1 Install the elevator joiner wire by thoroughly cleaning
the "arms with rubbing alcohol and roughening them with
coarse sandpaper Fill the holes you drilled in the elevators
with 30-minute epoxy then insert the wire arms all the way
in Make sure that both elevators are flat on the work
surface and are straight along the hinge line
D 2 After the epoxy has cured, attach the elevator
assembly to the stab with six hinges using the technique
described in the Expert Tip section following these four
steps After the CA has cured, flex the elevators to check
for free movement
D 3 Cut the hinge slots for the rudder and test fit the
rudder to the fin with the tail gear in position When
satisfied with the f i t remove the rudder Then use
30-minute epoxy to fasten the tail gear bearing into the
fuse Coat the wire where it passes through the bearing
with petroleum jelly to prevent it from becoming glued to
the bearing
D 4 Pack the tail gear hole in the rudder with epoxy, then
install the rudder in the same way as the elevators, using
three hinges Use a tissue dampened with alcohol to
remove any excess epoxy that squeezes out
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
A Cut the hinge slot using a #11 blade in a standard #1
knife handle The CA hinges provided have a thickness
that fits this type of slot very well Trial fit the hinge into
the slot If the hinge does not slide in easily, work the
knife blade back and forth in the slot a few times to
provide more clearance (it is really the back edge of the
blade that does the work here in widening the slot)
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 re-insert 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
D Rather than just making a single slit, it is better to cut
away a narrow rectangle of covering to provide an
adequate opening for the CA glue to wick into the slot
E Insert the hinges and install the control surface Verify
the left right positioning of the control surface and close
up the hinge gap to 1/32" or less It is best to leave a very
slight hinge gap rather than closing it up tight, to help
prevent the CA from wicking along the hinge line Make
sure the control surface will deflect to the recommended
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