14
68. Once the epoxy has cured, you can install the muffler, ignition,
throttle servo and fuel tank/fill setup. You may need to sand a little off
the firewall box in order to fit the muffler.
The throttle servo can either be installed on the firewall box or inside
the fuselage on the servo tray. We have included a Sullivan flex rod
and 2-56 clevises for servo tray mounting.
69. Install two high torque servos in the forward most slots on the
rear fuselage servo tray as shown. Note: You will need long control
arms for these servos.
70. Note the location of the servo arm on the inside of the fuselage.
Mark the location on the outside of the fuselage.
71. Use a rotary tool with a small bit to cut a slot in the fuselage at
the marks made previously. The slot should be long enough so the
control arm has room to move to full surface deflection. Our slots
were 1-1/4” x 5/16”. Note: An easy way to locate the servo arms is to
shine a laser pointer at the inside of the fuselage at the servo arm
location. You will be able to see the laser from the outside of the fuse-
lage. Otherwise you can make a mark with a hobby knife or pin.
72. Connect the 4-40 ball link adapter to the control arm and install
the arm on the servo.
73. Cut a 4-40 threaded rod in half, and thread a 4-40 nut onto one
end. Thread that end into the ball link adapter.
74. Connect a 4-40 clevis to the control horn with the servo and con-
trol surface centered and cut the rod to length (it should fit complete-
ly in the threaded portion of the clevis). Mark the location of the cle-
vis on the rod.
75. Remove the control arm/rod/clevis assembly and make another
rod the same length for the other elevator half. Assemble both
pushrods with a ball link adapter and 4-40 lock nut on one end and
4-40 clevis and lock nut on the other end.
Note: Instead of using the lock nuts, you can solder both clevises
onto the 4-40 rods.
76. Install the second pushrod assembly onto a long servo arm.
Elevator and Rudder Servo Installation
At this time, you must decide where you are going to mount the elevator
and rudder servos. If you think you will need tail weight (we did with a 4
lb motor) then mounting them in the tail is the best choice. Otherwise,
you can mount them in the center fuselage tray and use your choice of
pushrods. (we used the Sullivan S170 Heavy Duty Flex rods secured to
the ply formers on one of the prototypes). In the following section, we will
detail the installation of servos in the tail.
