Radio Installation - FUTABA 4YF-2.4GHZ Instruction Manual

4-channel, fhss radio control system for airplanes

Table of Contents

Follow these guidelines to properly mount the servos, receiver and battery.

• Make certain the alignment tab on the battery, switch and servo connectors is oriented correctly and "keys" into the

corresponding notch in the receiver or connectors before plugging them in. When unplugging items, never pull on the wires.

Always pull on the plastic connector instead.

• If any servo wires are not long enough to reach the receiver, servo extension wires (available separately) may be used.

• Always mount the servos with the supplied rubber grommets. Do not over

tighten the screws. No part of the servo casing should contact the mounting rails,

servo tray or any other part of the airplane structure. Otherwise, vibration will be

transmitted to the servo causing premature wear and/or servo failure.

• Note the small numbers (1, 2, 3, 4) molded into each arm on the Futaba 4-arm servo arms. The numbers

indicate how many degrees each arm is "off" from 90 degrees to correct for minute manufacturing deviations

from servo to servo.

• To center the servos, connect them to the receiver and turn on the transmitter

and receiver. Center the trims on the transmitter, then find the arm that will be

perpendicular to the pushrod when placed on the servo.

• After the servos are installed, operate each servo over its full travel and check that the pushrods and servo arms do not

bind or contact each other. Also make sure the controls do not require excess force to operate. If there is an objectionable

buzzing sound coming from a servo, there is probably too much resistance in the control. Find and correct the problem.

Even if there is no servo damage, excess battery drain will result.

• Use the mounting plate from the receiver on/off switch as a template for the cutout and screw holes. Mount the switch on

the side of the fuselage opposite the engine exhaust, and where it won't be inadvertently turned on or off during handling or

storage. Be certain the switch moves without restriction and "snaps" from ON to OFF, and that the cutout allows full motion

of the switch in both directions.

Receiver's Antenna Installation:

• To obtain the best receiving range, please refer to the following

instructions:

1. The antenna must be kept away from conductive materials,

such as metal and carbon by at least a half inch. The coaxial

part of the antenna does not need to follow these guidelines, but do not bend it in a small radius.

2. Keep the antenna away from the motor, ESC, and other potential RF noise sources as much as possible.

• The receiver contains precision electronic parts. It is the most delicate radio component on-board the model and should

be protected from vibration, shock and temperature extremes. To protect the receiver, place velcro

vibration-absorbing material. If appropriate, waterproof the receiver by placing it in a plastic bag and closing the open end

with a rubber band before wrapping it in foam. If moisture enters the receiver, intermittent operation or a failure may result.

Wrapping the receiver in a plastic bag also protects it from fuel and exhaust residue which, in some models, can work its

way into the fuselage.