Futaba 8SGAP User Manual

Futaba

DIGITAL PROPORTIONAL RADIO CONTROL

PCM

PULSE CODE MODULATION SYSTEM

INSTRUCTION MANUAL

FP-8SGAP

PCM 8 CHANNELS, FOR F3A AIRCRAFT

D60354

Thank you for purchasing a Futaba

digital proportional radio control set.

Please read this manual carefully before using your set.

TABLE OF CONTENTS

GENERAL INFORMATION

Features

............................

Contents and Ratings Glossary of Terms Basic

Transmitter Batteries and Charging Tachometer/Timer Receiver

and

S130 and FP-S130G

Splined Horns..........................

ADJUSTMENTS

Basic

Linkages and Using ATV (Adjustable Travel 2ND

ATV (Conventional)

Servo

Reversing Using Dual Rate (Aileron, Rudder Auto Dual Using VTR (Variable Suggestions on ATV , D/R. and VT R Using ATL FS BFS (Battery Fail

Servo Aircraft with Variable Pitch Throttle Aircraft Elevator/Flap Flap/Elevator Aircraft Flap Snap Programmable Mutual (Bi-directional) Mixing (FLPRON,

ELEVN, V TAIL,

(Fail

Trim

Roll

Safe)

Test

Position

with

Function Switch

(Adjustable

Functions

....................

......................

Controls

.................

Instructions

Operation

Servos

......................

Exploded

AND

Installation

Switches

...................

Rate

....................

Trace

Throttle

and

HOLD

Functions

Safe)

and

......................

Trimmer

Flaps

.......................

Mixing

.....................

Mixing

(Pre-Set Flaps and Elev.

Flaps and Spoilers (Airbrake)

......................

........................

Mixing

and Examples.

DIFF)

...................

............

.................

Views

FLIGHT

...................

Elevator, and Rudder)

..................

TECHNIQUES

...............

Volume)

Ratio)

..............

.............

Limit)

.............

BFS Memory

Prop

..............

............

...........

..........

...........

.........

.....

Trim)....

INDEX FOR TRIMMER PANEL FUNCTIONS

Switch or Description Ref.

Trimmer Number

1 Aileron Dual

Aileron 3 Aileron Linear/VTR 4

Throttle Delay 5

Pitch Delay Trimmer 6

Throttle/Pitch 7 Throttle/Pitch Mixing Safety 8

Throttle 9

Elevator Flap

& 12 Programmable Mixing Rate Trimmers .....

Slave

Master Channel

Aileron Differential Trimmer

ELEVN/V. Tail

FLPRON/DIFF

Flap

Airbrake Elevator

Airbrake Flap

Rudder 22 Rudder 23

Elevator Dual Rate Trimmer

Elevator Linear/VTR Safety

25-28

Snap Roll Timer Setting

Snap

Switch 16 Function Select

Automatic

Flap, Spoiler Elevator

Throttle Flap, Spoiler Elevator Mixing Switch . . . . ,

34-35 Aileron

36-37

Elevator

38-45

Servo 46-47 ATV/FS 48

Channel Select

49 Function Select Switch

Rate 1Trimmer

Dual

Rate 2 Trimmer

Safety Switch

Trimmer

...................

Mixing

Trimmer

Position

Trimmer

Mixing

Trimmer

Mixing

Safety Switch

Channel

Mixing

Board

Mixing

Switch

Roll

Mixing

........................

Trimmer

Dual

Rate

Linear/VTR Safety

Reversing

Trimmer

Safety

Switch

Dual

Rate

2ND

ATV Trimmers

2ND

ATV

Switches

Buttons

....................

Switch

Rudder

Mixing

Trimmer

...................

..............

.................

...............

Board

Switch Switch

...............

.................

..................

..........

.............

Switch

..........

.............

..........

..............

.............

...............

Switch

..............

Switch Trimmers (Optional)

Switch

Safety

Switch

...............

..........

...........

Switch

..........

.............

. .

......

Page

NOTE:

Please read and follow instructions fo r installation and usage in their entirety and follow carefully. Failure to follow instructions could result in serious property damage and/or personal injury. This system is intended for use by experienced R/C hobbyists. Beginners should seek expert advice and Assistance before operating this system.

•FEATURES

The FP-8SGAP was specially developed to use PCM (pulse code modulation) for FAI RC aerobatics F3A aircraft. It is an extremely noise and dead-point resistant digital proportional RC set with a microprocessor in the transmitter and the receiver. Please read this manual before using your set.

TRANSMITTER FP-T8SGAP

• RF module system. The frequency band can be changed with one touch.

• DSC (Direct Servo Controller) allows operation of

the

servos

without turning

Wire operation is possible by using the special

cord supplied (FSC.1)

•Servo reversing switch for all channels reversing

• Dual rate or non-linear VTR (variable trace ratio) aileron, elevator, and rudder. Two-stage

dual rate on aileron.

• Rudder auto dual rate. Rudder dual rate is turned on and off automatically with operation of the throttle stick.

• Newly designed slantable open gimbal sticks provide maximum operation feel. Stick angle and spring strength can be adjusted.

• Non-slip adjustable lever head. The can be adjusted by turning the knob head.

• New throttle -> pitch control mixing is for variable pitch propeller which maximizes engine power and propeller efficiency.

•Mutual tor, and aileron differential operation.

• Elevator -> flap mixing is especially advantageous i n circle ae robatics.

• Flap, spoiler -> elevator mixing allows control of the aircraft attitude while using the air brake (flap, spoiler).

• Throttle -> (flap, spoiler) -> elevator mixing allows enhancement of the air braking effect by throttle stick operation when diving and landing.

• Programmable mixing function permits mixing

with the desired channel.

• Four-function snap roll

al)

• Idle-up lever, the engine idling speed can be independently adjusted during throttle -> pitch

control mixing.

• New single-chip microprocessor allows one-touch

fail safe setting and introduction of an automatic transmission system which eliminates the need for fail safe setting at the beginning of each flight and improves safety.

the

servos

with the fl ip of a switch.

mixing

aileron + flaps, and aileron +

function

on the tr ansmitter.

allows

stick length

perfect

allows aileron+ eleva-

rudder mixing

switch (timer is option-

•Pitch

control pitch propeller can be adjusted during throttle -> pitch control mixing.

• New ATV (Adjustable Travel Volume) on all channels allows independent adjustment of servo left, right, up, and down throw.

•Second ATV. Besides new pushbutton ATV on aileron and elevator, conventional trimmer ATV is also installed.

• Monitor lamp comes on when throttle -> flap,

spoiler -> elevator mixing or throttle -> pitch control mixing and flap, spoiler -> elevator mix-

ing and snap roll are set and goes out when they

are

use.

• Fail-safe switch (function OFF switch) is provided for each function so that only the desired functions need be turned on.

•Throttle ATL (Adjustable Throttle Limiter) makes throttle linkage simple and positive.

• Two s e rv o tes t functions. A slow sweep to neutral characteristic, trackability cycle servo to test servo operation.

•Tachometer/timer with built-in tachometer, up timer, down timer, integrating timers, and battery alarm functions.

• Built-in power error back-up circuit. When the internal Nicd battery approaches the fully discharged state, an LED flashes to indicate that

the memories presetted (memory, ATV, FS, etc.) are gone. Please charge battery and set all memory functions again.

• Highest quality extruded aluminum case. So-

phisticated transmitter design gives easy fitness and comfortable feeling to your hands.

• Neck strap supplied as a standard accessory. The numerous functions of the transmitter can be

easily performed by supporting the transmitter

fro m your neck.

lever.

HIGH

side

pitch of

variable

check

RECEIVER FP-R118GP

•The

receiver

ceiver in which the highest reliability has been

pursued. It is the first R/C receiver in the world

to incorporate the newest computer technology.

• Miniature PCM receiver with high speed single microprocessor. Resistance to adjacent band and

spark noise interference has been increased by one full order of magnitude.

• Microprocessor servo hold function eliminates

erroneous operation is entered.

• Microprocessor provides fail safe and battery fail

safe functions for greater safety.

• Error lamp display allows checking of the receiv-

er operating state.

this

set

when a "dead

is a miniature PCM

point"

re-

area

SERVO FP-S130

•Small, double ball bearing, water-tight & dust-

tight servo. High output torque 55.6 oz-in (5kgcm), high-speed .24sec/60 .

• New indirect drive potentiometer improves

vibration and shock resistance and neutral precision.

• Futaba low-power custom 1C provides high start-

ing torque, narrow dead band, and excellent trackability.

• Fiberglass reinforced PBT (polybutylene ter-

ephthalate) molded servo case is mechanically strong and invulnerable to glow fuel.

• DC-DC converter in the power supply improves low-voltage operation characteristics.

• High sensitivity design with RF amplifier.

• Ultra narrow-band ce ramic filter and PCM sys-

tem are invulnerable to adjacent band interference.

• Gold plated connector pins eliminate poor con-

tact. Polarized housing improves reliability against shock and vibration.

•

DSC

circuit. Each the transmitter without turning on the transmitter by connecting the transmitter directly to the C terminal.

• Strong polyacetal resin ultra-precision servo gear features smooth operation, positive neutral, and very little backlash.

• Fiberglass reinforced epoxy resin PC board with

thru-the-hole plating improves servo amp vibration

and shock

•Thick

gold

plated connector pins contact and improve reliability against shock and vibration. The connector housing is polarized to prevent reverse insertion.

• Si x special adjustable splined horns.

servo

can be

resistance.

controlled

ensure

from

positive

SERVO FP-S130G

•Small

retractable

class

5-pole

4.7kg-cm, high-speed 0.34sec/60°, waterproof type.

•Since forward/reverse operation is controlled by the pulse width of the signal generated by turn-

ing the transmitter snap switch on and off, the motor stops at the end of its throw in either direction.

• Unlike other proportional servos, motor drive current does not flow when the servo is stopped even if a load is applied. Thus current drain is extremely low.

landing

micromotor.

gear High

servo

output

with

high

torque

• Fiberglass reinforced PBT (polybutylene terephthalate) injection molded servo case is mechanically strong and invulnerable to glow fuel.

•Strong

•

•Thick gold plated connector pins ensure positive

polyacetal features smooth operation, positive neutral, and very little backlash. Fiberglass

thru-the-hole plating improves servo amp vibration

contact and improve reliability against shock and

vibration. The connector housing is polarized to prevent reverse insertion.

reinforced

and shock

resin

ultra-precision

epoxy

resistance.

resin PC

servo

board

gear

with

•CONTENTS AND RATINGS

Ratings and specifications are subject to change without prior notice.

Model Transmitter

Receiver Servos Switch

Nicd battery

Accessories

Battery charger, landing gear adaptor, DSC cord, CHG adaptor, DSC-CHG cord, servo tray, frequency flag, spare horn, neck strap, screws

FP-8SGAP

FP-T8SGAP x 1 with module FP-TF-FM FP-R118GPx 1 FP-S130x4

SWH-5x 1 (R4-SWJx 1) NR-4J x 1

Transmitter FP-T8SGAP Receiver FP-R118GP

Operating system

Transmitting frequency

Modulation Power requirement

Current drain

: Two-stick, 8 channels for

F3A pattern

: 50/53MHz BANDS

72/75MHz BANDS 53MHz

<->

72MHz Frequency change to any of above bands is possible by merely changing RF module.

PCM, FM

: 9.6V 8/500mAH internal

Nicd battery

: 250mA

Chosen band

Receiving frequency

Intermediate frequency Power requirement

Current drain Dimensions

Weight

Receiving range

50/53MHz BANDS 72/75MHz BANDS 455kHz

4.8V Nicd battery (shared with servo) 42mA (4.8V reception)

2.23 x 1 . 65x0.94 in (57 x 52 x 24mm)

1.85oz (53g) 500m on the ground 1000m in the a ir

When FP-T8SGAP used.

(At the best radio wave con-

dition of environment)

Chosen band

Servo FP-S130

Control system

Operating angle

Power requirement Current drain Output torque Operating speed Dimensions

Weight

+pulse width control, 1520

uS.N

One side 45° or greater (including trim)

4.8V

(shared

5mA (at idle)

55.6oz.in (4kg-cm)

0.24 sec/60°

1.52x0.77 x 1.36 in (38.5 x 19.5x34.5mm)

1.47oz (42g)

Battery Charger FBC-8B(2)

Input voltage

Output

: 120 VAC, 50/60 Hz : TX side 9.6V/45mA

RX side 4.8V/45mA

with

receiver)

Landing Gear Servo FP-S130G (Option)

Control system Operating angle Power requirement Current drain Output torque Operating speed Dimensions

Weight

+pulse width control

Rotary approx 160°

4.8V (shared with receiver) 8mA (at idle)

65.3oz.in (4.7kg-cm)

0.34 sec/60°

1.52 x 0.77 x 1.36

(38.5 x 19.5 x 34.5mm)

1.48oz

(42g)

Receiver Servo Nicd Battery NR-4J

Voltage

Dimensions

Weight

: 4.8V, 4/500mAH :

2.01 x 2.28 x 0.59 (51 x 58 x 15mm)

: 3.35oz (95g)

•GLOSSARY O F TERMS

NOTE: Please take the time to familiarize yourself with the terms and abbreviations below. They will be used throughout the instructions and are important in understanding the operation and potential of your system.

PCM (Pulse Code Modulation)

Pulse Code Modulation utilizes a precise digital

code to convey information from the transmitter encoder to the receiver. This state of the art method makes many of the sophisticated functions of the FP-8SGAP possible, as well as providing far superior immunity to noise and interference than is possible with conventional encoding methods.

ATV (Adjustable Travel Volume) This feature allows independent adjustment of servo travel in each direction. ATV is sometimes referred to as "endpoint adjustment". Two different types of ATV ar e standard with this system,

(1) Pushbutton or Programmed (Memory) ATV and (2) 2nd ATV (Conventional).

MEMORY ATV This type is available on all eight channels. These adjustments are stored in the transmitter memory circuit and are retained when the power switch is turned OFF. They are lost however, if the transmitter Nicd batteries reach full discharge.

2ND

ATV Available on Aileron (CH 1) and Elevator (CH 2). This is the conventional type ATV which is set

using trimmer pots on the transmitter back panel.

These

settings are

batteries are discharged. DUAL RATE

Rate switches allow the pilot to select different servo travel limits (for varying control sensitivity) in flight. Servo travel is affected equally in both directions from center.

SAFETY These switches, located on the transmitter trimmer panel allow mixing and certain other functions to be deactivated when not desired. When the Safety Switches are set to the INHIB position, the function will remain OF F even if the transmitter control switch is set to ON.

VTR (VARIABLE TRACE RATIO)

This is a special type of non-linear control re-

sponse. When VTR is used, servo travel is normal

and linear up to about 80 percent of the transmit-

ter control stick movement where the servo travel

is abruptly increased to a higher rate (both rates adjustable). This allows a normal fee l for most f l y-

ing with extra movement available for emergencies and certain aerobatic maneuvers. Another way to think of this function is as "automatic Dual Rate".

(ACT/INHIB)

NOT affected if the transmitter

SWITCHES

SERVO This function allows the modeler to reverse the direction of servo movement (in relation to control stick movement) for various installation requirements. This can be done by conveniently flipping a switch on the trimmer panel. Servo travel and neutral position are not affected.

BFS This function provides a warning to the flyer when airborne battery voltage reaches a critically low

level

or slow position. ATL (Adjustable Throttle Limit)

This feature makes adjusting the throttle linkage much the LOW or IDLE position and not the HIGH throttle servo position. Therefore, the linkage can be set for proper opening at high throttle and the trim out changing the maximum opening.

MIXING

In general, mixing functions allow two or more different channels to be operated by moving a single transmitter control. Many useful and versatile functions are made possible in this manner. Three types of mixing functions are provided.

(1) Unidirectional mixing — This function allows one or more channels to be "slaved" to a "master" channel. Movement of the master channel control causes movement of both master and slaved servos simultaneously. Operation of the slave channel control however, does not cause movement of the master channel servo. An example is Aileron/Rudder mixing (see page 33) where the Rudder is

slaved to Ailerons for coordinated turns.

(2) Mutual (Bi-Directional) Mixing — With this

type of mixing, two channels are mixed so that operation of the control for either channel causes movement of both servos. This is useful in provid-

ing sophisticated functions such as V-tail opera-

tion,

(3) Switch-Activated Mixing — Two or more

channels can be programmed so that the servos involved move to a preset position when a transmitter control switch is pulled or button pushed. Snap roll switches, roll buttons, and pre-set flap switches are examples of this type of mixing.

REVERSING

(Battery

by moving

easier.

lever used

flaprons, and

Fail

The

Safe)

the

throttle

set

elevons

the

servo

trim

proper

tailless

lever

idle

medium

affects

speed

designs.

slow

only

with-

PROGRAMMED MIXING FAIL SAFE

Unidirectional mixing of any two channels desired is possible using the pin board and jumper connectors on the transmitter back panel. Either chan-

nel

may be

DSC (Direct Servo Control)

Operation of the entire system with the transmitter switch in OFF position is possible using the DSC cord. This is useful for checking and adjusting control movements on the ground while someone else is flying on your frequency.

designatedas"master" or "slave"

The Fail Safe function moves servos to a pre-set position if the transmitter signal is lost or interrupted by strong interferrence. The held in the again received at which time Fail Safe is released.

HOLD

The Hold function holds servos at the same position as immediately prior to signal interruption. Hold is released when a proper signal is resumed.

pre-set

position

until a proper

•BASIC TRANSMITTER CONTROLS

The servo reversing switches are assumed to be in the normal position in the descriptions in this section. When the reversing switches are in the reverse position, servo operation is the opposite of that described here.

servos

will

signal

Aileron stick

Elevator stick Throttle stick Rudder stick

Landing gear switch Controls the landing gear.

Flap and flap trim control (CH6) knob Spoiler (CH7) control knob Pitch control (CH8) lever

HIGH side trimmer Idle-up lever

Flap, spoiler -> elevator (6, 7 -> 2) mixing ONOFF switch

Throttle -> (flap, spoiler) -> elevator

2) mixing / Throttle -> pitch control mixing ON-OFF switch

Elevator -> flap (2 -> 6) mixing ON-OFF switch Snap Roll ON-OFF switch (self of f) Aileron dual rate switch (2-stage) Elevator dual rate switch Rudder dual rate/Programmable mixing ON-

OFF switch Aileron trim lever Elevator trim lever

Controls the ailerons. Controls the elevators. Controls the throttle. Controls the rudder.

and pitch control

(3 -> 6, 7 ->

19 Throttle trim lever with ATL

20 Rudder trim lever 21 Tachometer/timer

The tachometer/timer has the following functions:

7. TACHOMETER

• Measurement by external sensor.

• Two blade propeller specifications: LOW range 100 to 30,000 rpm

Error 100 rpm

HIGH range 100 to 60,000 rpm

Error 200 rpm

2. UP TIMER

• 0 to 60 minutes

3. DOWN TIMER

•

60 to 0

minutes

4. INTEGRATING TIMER

• 0 to 60 hours with minutes display.

5. BATTERY ALARM

• Al ar m sounds when t h e transmitter Nicd

batteries

with seconds display.

with

approach the

seconds

usage

display.

limit.

Monitor Lamps

IMPORTANT: In all instructions on control functions. Items designated by a number inside a circle (For example 10 ) are transmitter controls normally accessable and operated in flight. Items designated by a number within a box (Fo r example 10 ) are adjustment functions not operated

while in flight.

•Lamp A Power Monitor

• When the power switch 23 is set to ON, this lamp flashes on briefly and then goes out momentarily as the Fail Safe data is automatically matically transmitted to the receiver. Fail Safe data is transmitted every 60 seconds at which time the lamp al so goes ou t momentarily. If the transmitter Nicd battery nears full discharge, this lamp starts blinking, indicating that the power error backup function is activated. When this occurs, transmitter memory function settings are los t and must be reset.

Lamp B3 -> 6, 7 -> 2 / 3 -> 8 Mix

This lamp comes on when Safety Switch 7 and/or 33 is set to ACT position, indicating that throttle — flap, spoiler -> elevator

mixing and/or throttle — pitch control mixing functions are activated. This lamp will blink when transmitter control switch II is set to ON (placing these functions in operation).

Lamp C 6, 7 -> 2 Mix 32

• This lamp comes on when Safety Switch 32] is set to ON (flap,

When the power switch 23

is set to ON, lamp A will

go out momentarily.

This indicates automatic data transmission on and is

not a failure.

spoiler — elevator mix) or CH7 OFF (flap -> elevator mix) position. This lamp blinks when transmitter control switch 10 is set to ON.

Lamp D Snap Roll

•When Safety Switch 29 is set to ACT (snap roll function activated), this lamp blinks. When the Snap Roll switch 13 is pulled, this lamp continues blinking.

Power switch

• The transmitter power ON-OFF switch is provided with a locking feature to prevent accidental movement. To operate the switch, pull the knob gently outwards and set to the desired position (UP-ON, DOWN=OFF).

Hook Metal hook for the accessory neck strap.

Level meter

•This meter indicates the transmitter battery voltage and output power.

•When the antenna 26 is extended fully and the power switch 23 is set to ON, the pointer should move to the white zone.

• If the transmitter RF Module 32 is not installed, the meter pointer will not move.

• If the meter pointer moves to the red zone, indicating that the Nicd battery voltage is low,

the signal range will become shorter. If the Tachometer/timer 21 power switch is ON, the battery alarm function will operate after about one more flight. When the meter pointer stops at the boundary between the white and red

zones, recharge the battery.

Antenna Strong 1m 10cm telescoping antenna. Extend the antenna to its full height when using the transmitter. The antenna will lock in place with a click when pulled up to its full height.

Carrying handle

Tachometer sensor connector

• When not using this connector and the charging socket 29, cover them with the rubberbacked cover supplied to protect them against

dust. Charging socket and DSC (Direct Servo Con-

troller) connector

•This

connector

used

both

the

charging socket and DSC connector. See page 10 for charging instructions.

Non-slip adjustable lever head

The length of the lever head can be adjusted to fit the operator.

Lever head

Fig.

Unlock lever heads

, by turning them and in the arrow direction, and adjust the head to the most comfortable length.

Slantable stick adjusting screws

The angle of the stick levers can be changed.

Fig.

Turn this screw with a Phillips screw-driver.

The open gimbal st ick angle can be adjusted from about 3° to the inside to

4.5° to the outside by turning the adjusting screw as shown in the figure. Adjust the stick to the

Phillips screwdriver

most comfortable angle.

The strength of the stick lever spring can be adjusted.

Remove these

screws, and remove the

back cover.

MODE I

Fig.

Aileron

5-A

Turnwith a Phillips screwdriver.

Rudder

Elevator

The spring strength can be adjusted as desired by

removing the transmitter back cover and turning the adjusting screw of each stick. Adjust the spring strength for the best stick feel.

MODEII

Remove the three screws shown and remove the

transmitter righthand side panel as shown in

Fig. 5-B. Displace th eside panel away from the case. (slide down-off) Disconnect the power connector. Adjust the spring tension. Cautions

• Be sur e that the PC board attached to the side

panel does not touch the transmitter case.

• Disconnect the power connector before side

panel completely off, while side down-ward, to avoid touching wit h T X case.

•When the power connector is disconnected,

the memorized contents (ATV, FS, etc.) are cleared. When flying again, reset the contents.

Elevator

Aileron

Rudder

Transmitter RF module

• Change this module when switching frequency bands

(50, 53, 72, and 75MHz).

A temperature rise at the RF module section during use is normal.

Fig.

Fig. 5-B

The side panel can

be removed by

removing these

three screws.

Transmitter crystal

While pushing this tab to the

inside, pull t h e RF module forward.

Power connector

Mini stand

• Use this stand as shown

in Figure when laying the transmitter down. This makes operation

easier and protects the

RF module and

transmitter back.

The 4 rubber feet

supplied can also be

installed using the transmitter back screws.

* NOTE: The 4 rubber feet supplied as accessories

can be installed on the transmitter back (using the longer back cover retaining screws) to provide additional protection.

Snap roll direction switch (R/L) Snap roll direction switch (UP/DOWN)

• These switches control the direction of

the snap roll

when the Snap roll switch 13 is used.

Fig.

Fail safe set button

• This pushbutton is used when setting the Fail Safe servo positions (FS instructions Page 25).

Fig.

Back Cover

• Removal of this cover exposes the trimmer panel. Remove as shown in Fig. 10.

Remove the back cover by pulling

these stoppers in the arrow direc-

Left-right

Fig.

Trimmer Panel

•This

panel

transmitter functions. Use the small screwdriver supplied with the set for making adjustments.

switching

contains switches,

Up-down switching

buttons,

and trimmers

tion.

for

setting and adjusting the many

versatile

Fig.

Fig. 11

•BATTERIES AND CHARGING INSTRUCTIONS

TX (transmitter)

AC-120V

Battery charger FBC-8B (2)

LED

Antenna

RX (receiver)

Receiver

Female

Male

NR-4J

•The

Direct

Servo

Controller

system connects

the signals from the transmitter directly to

terminal C of the receiver through a wire and controls the servos without radiating radiowaves. It is extremely convenient when flying on the same band or during meets, etc.

Female

Install the accessory

DSC.CHG

Female

Fig. 12

Charging socket

and

DCS

connector

Male

DSC.CHG cord

(connector with tab)

to the side of the

aircraft fuselage to

Female

CHG

Adaptor

use the charging/DSC

socket.

cord

Male

Notes:

(1) First, connect to TX Nicd and red lamp goes o n . (2) Then, connect to R X Nicd after connecting, L.E.D.

changes color from red to greenish red (orange)

which indicates that both T X and R X Nicds are being charged.

(3) In case o f separate charging, L.E.D, color will be:

RX Nicd-Green TX Nicd - Red

Female

•Make the connections shown in Fig.12. Connecting the special DSC.CHG cord w ith ta b to receiver terminal C and installing it to the side

of the aircraft fuselage is very convenient.

•When the DIN connector of the DSC cord is

connected to the DSC connector 29, the

power to the encoder inside the transmitter is

turned on. The transmitter power switch is OFF.

• When

not using the DSC, disconnect the DIN

connector.

• To operate the servos, turn on the receiver

andservo switch.

Make this

connection when

using the DSC.

DSC cord

Female

Before using your system, recharge the Nicd batteries as follows:

•Connect the DIN connector of the FBC8B (2) battery charger to the transmitter charging socket 29 . Also connect the 3P connector to the airborne NR-4J Nicd battery and plug the battery charger into a 120VAC outlet as shown in Fig. 12 . The airborne batteries can also be charged through the DSC/CHG harness by connecting the CHG adaptor to the charger as shown in Fig.12. In this manner, t he airborne batteries can be charged

without removing them from the model.

• Normally recharge the battery for about 15 hours. If it has not been used for some time, discharge and recharge it two or three times and then charge it a full 15 hours.

• The amount of time remaining be fore the batteries must be recharged can be estimated using the Integrating Timer function of the Tachometer/Timer 21 . It is recommended that this function be used to monitor remaining flying time.

(See Page 11 for detailed instructions.)

• The transmitter and receiver together or independently.

•A fully-charged transmitter battery can be used for about 10 flights of 10 minutes each. The airborne NR-4J Nicd battery can be used for about 6 flights when about 4 flights when 10 servos are used.

• If the system is not to be used for some time, it should be fully

charged before storage and recharged monthly to avoid full

discharge and loss of memory settings (ATV, FS, BFS memory, etc.).

Nicd batteries can be charged

6 servos are used and

+ 26 hidden pages

Futaba 8SGAP User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual