Great Planes F4 Phantom - GPMA0440 - Manual (Page 39)

25. Adjust the elevators so that they are in the neutral
position and the split coupler is centered on the overlapping
pushrods. Use silver solder to tack the three pushrods and
coupler together, being careful not to melt the clevis.
Hint: A pair of hemostats, or a small pair of locking pliers
clamped to the pushrod between the coupler and the clevis,
will act as a heatsink to help prevent the clevis from melting.
30. Enlarge the servo horn holes with a 5/64" drill bit.
31. Insert the pushrod into the servo horn and secure
it with a nylon Faslink connector (not included). Check
the operation of the retract, making sure that the servo
does not stall when the retract is raised and lowered.
How To Achieve A Good Solder Joint
A. Roughen the area to be soldered with fine sandpaper.
Thoroughly clean the area with rubbing alcohol.
B. Assemble the items to be soldered.
C. Apply a small drop of soldering flux.
D. Heat the area to be soldered. Apply solder to the
heated area. The metal must get hot enough to melt the
solder and the solder must flow into the joint. Do not melt
the solder by touching it to the soldering iron.
E. Do not move the parts until the solder has cooled.
F. Clean off the excess flux with alcohol.
G. Test the joint by pulling on it.
26. Remove the clevis and swivel clevises from
the pushrods and securely solder the pushrods and
coupler together.
27. Allow the pushrods to cool before reinstalling the
swivel clevises on the 5-1/2" pushrods. Install a silicone
retainer and the clevis on the 3-1/4" pushrod. Reattach the
clevises to the swivels and servo horn and check the
elevator's movement.
in the aileron servo tray and route the wires out the side of
the tray. Connect the servos to the electronic mixer and the
mixer to the receiver. If you are not using flaperons install
only one aileron servo in the aft servo mounting hole and
connect it to the receiver.
torque rod until the bottom of the horn is 1/2" above the
surface of the wing.
1. If you will be using flaperons install the aileron servos
2. Thread a nylon torque rod horn onto each aileron
3. Thread nylon clevises, 13 turns, onto two 2-56 x 12"
threaded rods. Slide a silicone retainer over each pushrod
and connect the clevises to the torque rod horns, securing
them with a retainer.
Perform steps 28 through 31 if using mechanical
retracts in your model.
4. Connect the aileron servos to the receiver and adjust
28. Cut off 1/2" of thread from a 4" threaded pushrod
(not included).
29. Retract the nose gear and adjust the retract servo
to the proper position. Mark the 4" pushrod where it
crosses the servo horn. Make a 90-degree bend at the
mark and cut off the excess wire 3/8" above the bend.
the servos to the neutral position. Trim two servo horns so
that each horn has one arm. Install the servo horn on the
left side of the forward aileron servo and on the right side of
the aft aileron servo. The horn must be installed
perpendicular to the centerline of the servo.
5. Center the ailerons and mark the pushrods where
they cross the servo horn holes.
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