Radio Installation; Install The Servos - GREAT PLANES Ryan STA EP Instruction Manual

RADIO INSTALLATION

Install the Servos

1. Install the elevator and rudder servos in the servo tray
using the hardware provided with the servos. Note their
orientation in the photo.
2. From the 6-1/2" white nylon inner pushrod, cut eight
1/8" [3.2mm] long bushings.
3. Make a rudder and an elevator pushrod by cutting
two 2-56 x 36" [914.4mm] pushrods so that each is 22"
[558.8mm] long measured from the threaded end.
4. Wipe the pushrods off with a paper towel dampened
with denatured alcohol to remove any oil left on the rods
during manufacturing. Slide four bushings evenly spaced
onto each pushrod. Adjust the bushings nearest the ends of
the rod so they will not interfere with the ends of the outer
pushrod tube and possibly become jammed during flight. If
the bushings slide onto the rods without much resistance,
use a drop of thin CA to hold them in position.
5. Thread a nylon clevis approximately 14 turns onto the
threaded ends of the pushrods. Remove the backing plate
from one of the small control horns and connect the
control horn to the clevis on one of the pushrods. Insert the
pushrod in the rudder pushrod tube on the left side of the
fuse. Position the control horn on the rudder fairing and
mark the control horn location on the fairing.
6. Position a 3-ply control horn base over the control
horn location. Mark the outline of the control horn base on
the fairing. Carefully trim the fairing so that the control horn
base can be recessed into the fairing, flush with the top of
the fairing. When satisfied with the fit, glue the control horn
base to the fairing.
7. Attach the rudder control horn to the control horn base
with two #2 x 3/8" [9.5mm] sheet metal screws. Remove
the two screws and put a drop of thin CA in each hole to
harden the wood. After the CA has cured, reinstall the
control with the #2 x 3/8" [9.5mm] sheet metal screws.
HINGE LINE
CORRECT
8. Attach the elevator halves to the stabilizer. Attach a
small control horn on the second pushrod and insert it in the
elevator pushrod tube. Position the control horn on the
elevator as shown on the plan. Mark the location of the
control horn mounting holes and drill 3/32" [2.4mm] holes at
the marks. Temporarily mount the elevator control horn on
the elevator with the backing plate and 2-56 x 1/2" [12.7mm]
machine screws.
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INCORRECT