arf EXTRA300L, Instruction Manual, Page: 19 / 37

3
．
Install the horns the same way as the horns on the aileron. Use your radio to set
the servo center position and install the large control horn onto the servo.
Assemble the control rod and ball links and adjust the control linkage for proper
geometry. When satisfied, screw the ball link to the servo arm. The servo arm
should be as close to perpendicular to the control rod as possible while the
elevator is at neutral. Double check all screws, bolts and nuts to assure proper
installation and operation without binding.
(Below long ALU arm is not included)
4
．
To install the horizontal stabilizers you first need to install two 12” servo wire
extensions in the fuselage so that they extend from the radio compartment to the aft
openings.
5
．
There is an option to use one servo or two servos for the elevator. If using one
servo, the 2 parts of the elevator need to be connected by the Fiber glass block with