Manual Futaba FP8SSHP (page 23 of 36) (English)

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RECEIVER AND SERVOS

FS (Fail safe) and HOLD functions

•The HOLD function holds all the servos

at the

po-

sition immediately before a bad set of signal is

received. When normal radio waves arrive, or the

interference disappears, hold is released.

•The

FAIL

SAFE

function

moves the

servos

preset position set at the transmitter, one second

after interference is received. When the interference

disappears, FAIL SAFE is released.

Although already described in the transmitter sec-

tion,

(fail

safe)

function

which

moves

the

servo of all the channels to the position preset at the

transmitter when continuous strong noise is received

by the receiver for about one second or longer. The

set operates in the hold mode during the one second

the noise or interference is received.

B.F.S, (battery fail safe) function

The B.F.S, locks the throttle channel only in the posi-

tion preset by FS when there is very little power left

in the receiver and servo side Nicd battery. (If nothing

is set, the throttle channel becomes medium slow.)

The throttle channel can be released and operated for

36 seconds by moving the throttle stick in the slow

direction. After 36 seconds, the set reenters the B.F.S.

mode. When the set enters the B.F.S, state, immediate-

ly land the aircraft.

•Connect

the

receiver,

servo

switch,

and

bat-

tery firmly as shown in Fig. 57. Then extend

the transmitter and receiver antennas to their

full length.

•Set the transmitter power switch to ON, then

set the receiver switch to ON. The servos stop

near the neutral position. Operate the transmit-

ter 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 trans-

mitter stick. If the direction of servo travel is

opposite the desired direction, switch the servo

reversing switch.

•Operate each servo to its full stroke and check

if the pushrod binds or is loose. Unreasonable

force

applied to the servo horns is not only bad

for the horns, but will also cause the battery to

run down quickly. Always make the stroke of

each control mechanism somewhat larger than

the full stroke (including the trim component)

of the servo horn. Adjust the servo horns so

they move smoothly even when the trim lever

and stick are operated simultaneously in the

same direction.

•Be alert for noise.

This set has noise rejection circuits, however,

noiseless parts are recommended.

•When installing the switch harness, cut a rec-

tangular hole somewhat

larger

than the

full

stroke of the switch, and install the switch so it

moves smoothly from ON to OFF. Install the

switch inside the fuselage and attach a piece of

wire to the switch so it can be turned on and

off from the outside. Install the switch where it

will not be exposed to engine oil, dust, etc.

•Even though the receiver antenna may

appear

to be too long, do not cut or bundle it.

•Install the servos securely. Tighten the mount-

ing screws until the rubber damper is slightly

crushed.

the

screws

are

too

tight,

the cushion-

ing affect of the rubber damper will be lost.

•The

crystal

can

changed

from the outside

of the receiver case. Always use the Futaba

transmitter/receiver matched crystal set to

change the band.

•

A spare

servo

horn

supplied

with

the

set.

Use this horn as needed.

•Use extension cords as needed.

•Wrap the receiver in sponge rubber. Water-

and dust-proof the receiver by placing it in a

plastic bag and wrapping a rubber band around

the mouth of the bag. Do the same with the

receiver/servo battery.

•Use the rubber bands wrapped around the re-

ceiver to hold the servo and switch leads.

•After mounting is complete, recheck each part,

then check the transmitting range by making

the transmitter antenna as short as possible, ex-

tending the receiver antenna to its full length,

and operating the transmitter from a distance

of 20m to 30m from the receiver. The move-

ment of each servo should follow the move-

ment of each transmitter stick.

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Futaba FP8SSHP Manual

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