Great Planes PT-E Trainer Electric Kit - GPMA0110 - Manual (Page 36)

FINAL ASSEMBLY
D 1 In the same manner as the elevator, install the
rudder hinges by first inserting them into the fin
trailing edge and applying thin CA glue NOTE:
Remember that you previously cut off part of the
bottom rudder hinge, so you must find that hinge
and use it in the right place
D 2 Force 30-minute epoxy into the rudder hinge slots
with a plastic soda straw, and push the rudder onto
the hinges Wipe away all excess epoxy with a tissue
dampened with alcohol
D 3 Re-install the servos and the radio switch
D 4 Wrap the 225 mAh receiver battery in foam rubber
and insert it into the area between the battery box
rear and the servos
D 5 Mount the receiver to the top of the battery box
in the location shown on the plan using the square
of double-sided foam tape (provided) Plug the
servo wires into the receiver (The rudder servo
must be plugged into the aileron channel for 2
or 3-channel operation).
D 6 Re-install the control horns, pushrods, main land-
ing gear and nose gear NOTE: To attach the elevator
and rudder pushrods to the servo wheel, remove the
servo wheel from the servo, drill a 5/64" hole in the
servo wheel if necessary, woik the Z-bend into the
hole in the servo wheel, then replace the servo wheel
onto the servo
D 7 Re-install the motor, switch harness and
aluminum prop hub (secure the hub by tightening
the 6-32 alien setscrew)
D 8 Apply 1/4" wide foam wing seating tape all around
the wing saddle area to protect the wing
D 9 Lay the wing in place on the wing saddle and
carefully center it side-to-side, holding it in place
with a couple of rubber bands Now check the align-
ment of the wing by measuring from the wing tips
to the fin TE The measurements should be the same,
within 1/16" If not adjust the position of the wing
in the saddle When you have the wing positioned
properly, secure it with a total of six #63 rubber
bands To help in aligning the wing in the future,
you may now make marks at the leading and trailing
edge at the center of the wing, and make correspond-
ing marks on the top of the windshield and the front
of F-3 for future reference
D 10 Route the receiver antenna along the right side
of the fuselage and out through a small hole drilled
through the fuselage top rear and through F-3
NOTE: The antenna hole must enter the radio com-
partment approximately 5/16" below the top of F-3
so the antenna will not be pinched by the wing T E.
(See the antenna drawing on the fuselage plan).
D 11 If your lightweight wheels are the foam type with
square edges, you may sand them to a rounded (more
streamlined) shape using a sanding block
D 12 Install the main wheels and nose wheel using
1/8" wheel collars (not supplied) on both sides of
each wheel A small drop of oil on each axle will help
the wheels turn freely
BALANCE YOUR MODEL
NOTE: This section if very important and must not
be omitted!
D 1 With the wing attached to the fuselage, all parts
of the model installed, including the 6 or 7-cell
motor battery, gently turn the model upside down
D 2 Carefully measure 3 inches back from the LE of
the wing along both sides of the fuselage and mark
the location of the center of the balance range
(this point is approximately at the rear edge of the
spar) Now turn the model right side up
D 3 Lift the model with your index fingers at the marks
you made at the center of the balance range (or for
more precision you may use the eraser end of two
pencils for lifting) If the tail drops when you lift,
the model is "tail heavy" and you must add weight
to the nose to balance If the nose drops, it is "nose
heavy" and you must add weight to the tail to bal-
ance
NOTE: The forward limit of the balance range is 3/8"
forward of the center mark The aft limit of the balance
range is 3/8" aft of the center mark
NOTE: You should make your first flights with the model
balanced in the center of the Balance Range Later you
may want to experiment by shifting the balance toward
the forward or aft limit of the recommended range Moving
the balance forward results in a model that is more resis-
tant to stalls and spins but also may act sluggish and
require more speed for takeoff and landing Moving the
balance aft makes the model more agile with a lighter and
snappier "feel" In any case, do not balance your model
outside the recommended range.
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