Manual Futaba ATTACK_4 (page 5 of 6) (English)

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PRECAUTIONS

• Connect the receiver (or MCR-4A), servos, switches, and

battery firmly as shown in Fig. 7 (Fig. 8). Then extend the

transmitter and receiver antennas fully.

• Set the transmitter power switch to ON. Then set the receiv-

er (or MCR-4A) power switch to ON. The servos stop near

the neutral position. Operate the transmitter sticks and

check that each servo follows the movement of the stick.

• Connect the pushrod to each servo horn, then check if the

direction of travel of each servo matches the direction of

operation of its transmitter stick. To reverse the direction of

servo travel, switch the servo reversing switch.

• Operate each servo over its full travel, and check if the push-

rod binds or is too loose. Applying unreasonable force to the

servo horn will adversely affect the servo and quickly drain

the battery. Always make the travel of each control mecha-

nism somewhat larger than the full travel (including trim) of

the servo horn. Adjust the servo horns so that they move

smoothly even when the trim lever and stick are operated

simultaneously in the same direction.

• Be alert for noise.

This set is noise-resistant, but is not completely immune to

noise. We recommend the use of noiseless parts and noise

killer capacitor.

• When installing the switch harness, cut a rectangular hole

somewhat larger than the full stroke of the switch and install

the switch so that it moves smoothly from ON to OFF. This

also applies to the switch mount when the switch is install-

ed inside the fuselage and is turned on and off from the out-

side

with

piece of wire, etc. Install

the

switch where

will

not be exposed to engine oil, dust, etc.

• Even though the receiver antenna is long, do not cut or

bundle it.

• Install the servos securely. Tighten the mounting screws un-

til the rubber grommet is crushed slightly. If the screws are

too tight, the cushioning effect will be adversely affected.

SERVO MOUNTING

Fig.

• Spare servo horns are supplied. Use them as needed.

• Wrap the receiver in sponge rubber. Waterproof and dust-

proof the receiver by placing it in a plastic bag and wrapping

a rubber band around the open end of the bag. Do the same

with the receiver/servo battery.

• Use the rubber bands wrapped around the receiver to hold

the servo and switch leads.

• After mounting is complete, recheck each part, then check

the range by making the transmitter antenna as short as

possible, extending the receiver antenna fully, and operating

the set from a distance of 20m to 30m. The movement of

each servo should follow the movement of each stick of the

transmitter.

• The motor controller connects to channel 3 in the MCR-4A.

•

Motor

aircraft vibrate

less

than engine aircraft, but the

receiver and servo should be vibration proofed.

•If the NiCd battery pack is connected in reverse,

the MCR-4A may be damaged beyond repair. Be

sure that the (+) and (—) connections are correct.

Black lead wire 0

Red lead wire +

Fig.

• After mounting and checking are complete, take your model

to the shop where you purchased the set, or to an experienc-

ed radio control modeler, and ask them to teach you how to

handle your radio control set in the proper manner and to

inspect your set-up carefully.

•

enjoy radio

control

models

fully,

sure

observe

all

safety standards.

USING THE ANTENNA FREQUENCY FLAG

Attach the frequency flag to

the flag holder as shown in the

figure.

Fig.

The flag can be attached to.

and removed from, the

antenna with one touch.

Fig.

This horn permits shifting of the

servo neutral position at the servo

horn. Setting and shifting the neu-

tral position.

a) Angle divisions

1) The splined horn has 25 seg-

ments. The amount of change per

segment is; 360-25=14.4°.

2) The minimum adjustable angle

is determined by the number of

arms or number of the holes. For

four arms, the minimum adjust-

able angle is:

Fig. 14

b) Effect

To shift the holes center line to

the right (clockwise) relative to

baseline A, shift arm 2 to the po-

sition of arm 1 and set it to the

position closest to baseline A.

[Example] For a four arm horn,

the angular shift per segment is

14.4". The shift to the right is 90°

-(14.4 x 6) = 3.6°.

To shift by the same angle in the

opposite direction, use the oppo-

site arm number.

Fig.

For a six arm horn, turn the arm

counterclockwise and set arm 2

to the position of arm 1. The ad-

justable angle is 60° - (14.4 x 4)

=2.4°.

Arm 3 shift 4.8° to the right, arm

6 shifts 2.4° to the left, and arm 4

shifts 7.2° to the right and left.

Fig.

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Futaba ATTACK_4 Manual

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