Futaba FP2GS User Manual

Futaba

DIGITAL PROPORTIONAL
RADIO CONTROL

FP-2GS

D60431

SPECIAL FEATURES:

TRANSMITTER FP-T2GS

• Contemporary
superior control.

• 500mW output.

• Battery level
voltage at a glance.

• Built-in antenna.

RECEIVER FP-R102GF

•BEC (Battery Eliminator Circuitry) system allows sharing
of the running Nicd battery and eliminates the need
regulator and diode.

•High performance 2 channel receiver with ASP system
when used with the proper transmitter.

•Crystal

socket
ture pins. Reliability is increased and the crystal can be
changed from the outside.

SERVO FP-S128
SMALL, RUGGED. HIGH NEUTRAL SERVO

•Skew type armature motor.
Movement of the trimmer by even one notch is tracked by
a skew type motor which displays a performance near that

of a

coreless motor.

•New indirect drive potentiometer improves vibration and

shock resistance and neutral accuracy.

•Futaba low-power custom 1C provides extremely high

torque, narrow dead band, and superior tracking.

•Fiberglass reinforced PBT (polybutylene terephthalate)

injection
invulnerable to glow fuel.

•Strong

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 resist­ance.

•Three pin connector eliminates faulty contact and improves

reliability against vibration and shock. Housing has a
reverse insertion prevention mechanism.

•Special grommet simplifies

an excellent cushioning effect.

•Six special adjustable splined horns.

•High 48.7 oz.in

use

molded

polyacetal

in almost any model.

styling with smooth operating gimbals for

meter indicates the state of the battery

for a

uses a new

servo

resin

type

of highly reliable subminia-

case

is

mechanically strong and

ultra-precision

servo

gear

features

mounting of the servo and has

(3.5kg-cm) maximum output torque allows

SET CONTENTS AND RATINGS

(Specifications are subject to change without prior notice.)

Model number
Transmitter
Receiver
Servo
Switch, battery holder, etc.

FP-2GS
FP-T2GSx1
FP-R102GFx1
FP.S128.x2

TRANSMITTER FP-T2GS.

Operating method 2 stick system
Transmitting frequency 27MHz band, 72MHz band
Modulation system AM (amplitude modulation)
Power requirement

12V,

round penlight battery x 8

Receiver FP-R102GF

Receiving frequency

Intermediate frequency

Selectivity
Receiving range

Power supply
Current drain
Dimensions

Weight

27MHz band, bands 1 to 6
72,75MHz
455kHz
3kHz/-3dB
550 yards (500m) on the ground
when used with FP-T2GS (At the
best radio wave condition of envi­ronment)

4.8V

to

8.4V

7.2V/13mA,4.8V/33mA

1.46x

2.19 x 0.75

(37 x 55.5 x 19mm)

1.34

oz

(38g)

in

SERVO FP-S128

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

Weight

+pulse width control

One side 45° or more

4.8V-6V

6.0V, 8mA (at idle)

48.7 oz.in. (3.5 kg-cm)

0.24 sec/60°

1.6x0.8x 1.6 in.
(40.5 x 20 x 40.5mm)

1.92oz. (53g)

HANDLING THE TRANSMITTER

•The name of each part of the transmitter is given in the figure.
Familiarize yourself with their operation.

•Remove the battery cover on the rear of the transmitter as
illustrated in the figure, and insert 8 round penlight batteries,

paying careful attention to their polarity.

•Extend the antenna fully, and set the power switch to the

ON position. The pointer of the level meter should deflect to
the green zone. If it fails to deflect, or deflects slowly, the
polarity of the batteries is incorrect, or the batteries are
faulty.

•Since the range of the radio waves will become short when

the pointer of the level meter deflects to the red zone, re­place the batteries when the pointer only deflects to the
boundary between the green and red zones.

•The

trim

lever

is

used

to fine

adjust

each

channel.

Use

it for
neutral adjustment and to correct the flying posture after
the mechanism has been installed. After test flight, operate
with the trim lever in the neutral position, as far as possible,
by correcting with the rod adjuster, etc.

•Since the elevator stick employs a self-neutral system, install
the sliding plate as shown in the figure when changing it to a
ratchet system. Then remove the strong spring attached to
the hook and replace it with the spring supplied as an ac­cessory.

Antenna

Level meter

(Engine control

trim)

Elevator trim
Elevator stick

(engine control

stick)

Power switch

Rudder

trim

Rudder stick

Fig.1

•When the transmitter is used with a tank, the direction of the
stick can be changed 90 degrees by removing the four rudder
stick mounting screws.

•To change the crystals, loosen the rear cover mounting screws,
remove the rear cover, and then replace the crystal. The
crystal is located at the left side of the printed wiring board.
The transmitter crystal is marked (T) and the receiver crystal
is marked (R). CAUTION: Frequency change has to be done
under the supervision of FCC licensed personnel.

The batteries can be
easily loaded by

Rear cover mounting screws

Fig.

Slide in the direction
of the arrow while
pushing here.

inserting them

a time from the back.

2

four at

Modification from self-neutral
system to ratchet system.

Install sliding plate
Replace with

weak spring

Fig.

3

The BEC mark is displayed on the front of the receiver of BEC (Battery
Eliminator Circuitry) system sets with a receiver with shared power supply
regulator.

RECEIVER FP-R102GF AND SERVO FP-S128

Receiver crystal

Fig.

4

Receiver FP-R102GF

Antenna mire

Connect the servo and switch as
shown in the figure and extend
the transmitter and receiver ante­nna fully.

Red common 2P
connector (male pins)

The Futaba BEC (Battery Eliminator Circuitry) system and BEC
& ASP (Adjustable Safety Position) system can also use a com­mon power supply with the conventional four penlight batteries
system (separate power supply).

Your NEW FUTABA Digital Proportional R/C system is guaran­teed against defects in workmanship and material for 180 days
from the date of purchase when the attached registration card is
returned to us within ten days of purchase.

This Guarantee is null and void if the R/C system has been im-

properly handled, damaged in a crash, or tampered with and
does not cover the replacement of plastic housings or electronic
components damaged due to the use of improper voltages.

When service is required, please take your equipment to your
local authorized service station or ship it directly to us. All
postage, shipping, and insurance charges must be paid by the
user.

ON

Switch

OFF

Red common 2P
connector

(Female pins)

Red common 2P

connector

(Female pins)

Red common 2P
connector

(Female pins)

Steering servo

Throttle servo

Connection to this connector

(1)When chassis power supply of

engine or motor car is separate

Wrapped with
rubber band.

(75MHz-OPTIONAL)

(2) When motor car uses a speci-

al 8EC system chassis (com­mon power supply specifi-

cations)

Controller

(3) When motor car uses an ordi-

nary common power supply
chassis

Connect to the red common

2P connector of the control-

ler.

Buy the red common 2P
connector from the kit
manufacturer and connect to
the controller.
Pin 1: Minus
Pin 2: Plus

•A common power supply regulator and diode may also be supplied with the speed controller, depending on the vehicle
kit. Since they cause a voltage drop, always remove them.

TO BUYERS OF THE FP-2GS (FP-R102GF)

When using a Futaba motor control amp instead of
the speed controller supplied with the vehicle, turn
off the ASP (Adjustable Safety Position) system as
shown in the figure.

Insert the ASP release co-

nnector packed "with
set at this 2P connector
(male pins) on the
wiring board.

printed

R102GF ASP

release

connector

the

Fig. 5

•Set the transmitter power switch to ON, then set the receiver
power switch to ON. The servos stop near the neutral position.
Operate the transmitter sticks and check if each servo faithfully
follows operation of the sticks.

•Connect the pushrod to each servo horn, then check if the direc­tion of travel of each servo matches the transmitter operation.

•Operate each servo over its full travel and check if the pushrod
binds or is too loose. Applying unreasonable force to the servo
horn will adversely affect the servo and quickly drain the battery.
Be especially careful when using 8.4V.

•Always make the full stroke (including trim) of the servo horns

somewhat larger than the full travel. 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.

Always solder a noise killing capacitor to the running motor. If
metal parts touch each other due to vibration, noise will be gener­ated and cause the receiver servos to operate erroneously. We re­commend the use of noiseless parts.

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

bundle it. The range of the radiowaves will be shortened.

Fig.

6

• Install the servos firmly. Install the servo to the servo tray
as shown in the figure. In other cases, install the servo as
described in the model manufacturer's manual.

Fig.

7

• A spare horn is provided. Use it as required.

•Wrap the receiver in sponge rubber and wrap rubber bands around
the sponge rubber. Mount the receiver so it is not exposed to vi­bration, does not touch the frame, and does not move.

•When the receiver is installed on a board or used where it may be
splashed with mud and water, place it in a plastic bag, etc. and
wrap a rubber band around the open end of the bag to waterproof
and dustproof the receiver. After use, remove the receiver from
the bag to prevent condensation.

• 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
transmitting range by making the transmitter antenna as short as
possible and 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 the transmitter sticks.

•The crystal can be changed from the outside of the receiver case.
Always use a Futaba transmitter and receiver crystal pair as the

or

replacement crystals.

REPAIR SERVICE

• When requesting repair of trouble that has occurred suddenly
of from long use, describe the trouble symptoms in as much
detail as possible.
This will facilitate detection of the trouble point and shorten
the repair period greatly.

• Defects caused
corrected free of charge.

• This limited warranty is null and void if the set has been tam­pered with or disassembled.
Refer to warranty statement for details.

by

faulty

materials

or

workmanship

will

be

WORLD SALES & SERVICE FACILITIES

Australia: FUTABA SALES AUSTRALIA PTY. LTD., Lebanon:

MELBOURNE TEL: [phone]

Argentine: MODELISMO AE RONAUTICO DEGA SRL. New Zealand:

BUENOS AIRES TEL: [phone]

Canada: UDISCO LTD., MONTREAL

TEL: [phone] Norway:

Chile: HOBBY LANDIA, SANTIAGO

TEL: 743957 Singapore:

Denmark: FUTABA IMPORT DENMARK,

COPENHAGEN TEL: [phone] South Africa:

England: RIPMAX LIMITED, LONDON

TEL: [phone] Spain:

Finland: NORETRON KY. HELSINKI

TEL: [phone] Sweden:

Greece: C. & G. MACR1YIANNIS CO., PIRAEUS

TEL: [phone] • or 021-41 76191 U.S.A.:

Hong Kong: RADAR CO. LTD. TEL: [phone]
Italy: RADIOSISTEMI SRL, Carrara W.Germany:

TLX: 500494 FORTIMI
FAX: [phone]

KHAIRALLAH MODELCRAFT, BEIRUT
TEL: 326-681
AMALGAMATED WIRELESS
(AUSTRALIA) N.Z. LTD. WELLINGTON
TEL: 58-979
HARALD LYCHE CO. A/S, Drammen

TEL: [phone]
SINGAPORE HOBBY SUPPLIES
TEL: [phone]

REDIPAK (PTY.) LTD.,
JOHANNESBURG TEL: 21-1511
HOBBY & TOY INTERNATIONAL,
VALENCIA TEL: [phone]
RADIO CONTROL CENTER,
JONKOPING TEL: [phone]
FUTABA CORPORATION OF AMERICA,
CALIFORNIA TEL: [phone]

ROBBE MODELLSPORT GMBH,
GREBENHAIIM TEL; 06644-870

Futaba

Frequency Channel No. Flag Color
2627MHz

26995
27045

27.095
27 145
27195
27255

72/75MHz

72.030

72.080

72.160*

72.240
72320*
72400
72550
72590
72630
72670
72710

72.750
72790
72830

72.870
72910

72.960*

75.640

Digital

• Aircraft/Car/Boat

-

Bro
Red Flag/Robbon)
Orange
Yellow

Green

Blue

• Aircraft only *'Shared
Bro

12

White/Brown
White/Blue
White/Red
Whi
White/Orange
Orange-Grey

38

Yellow-Black

40
42

Yellow-

44

Yellow-Yellow

46

Yellow-Blue

48

Yell

50

Green-Black

52

Gre

54

Green-Yellow

56

Gre
White/Yellow
White/Green

Proportional

wn

wn.Red(Top Flag/Ribbon Bottom

te/Purple

ow-Grey

en Red

en-Blue

Flag/Ribbon)

Red

Frequencies

75MHz

Car & Boat only

75.430

75.470
75510

75.550
75590
75670

75.710
75750
75790
75830
75870

53MHz -

53

100
53200
53300
53400

53.500

53.600

53.700

53.800

62

64
66
68
70
74
76
78
80
82
84

Aircraft/Car/Boat

—
—
—
—

-

—
—

(FOR U.S.A.)

Blue-Red (Top Flag/Ribbon Bottom

Blue-Yellow
Blue-Blue
Blue-Gray
Purple-Black
Purple-Yellow
Purple-Blue
Purple-Gray

Grey-Black
Grey-Red
Grey-Yellow

FCC Amatuer License Required

Black/Brown

Black/Red

Black/Orange
Black/Yellow

/Green

Black

Black/Blue
Black/Purple generally

Black/Grey

Not

in use

FOR OTHER MARKETS. FOLLOWING
FREQUENCIES ARE AVAILABLE.

FP

2GS

27MHz Band
29MHz Band
35MHz Band
40MHz Band
53/60MHZ Band
72/75MHz Band

AM

FM
0
0
0
0

0

X
X
X
X

X

X
X

The authorized frequencies on each countries
are as follows:

England ......

Sweden.
Scandinavian countries . . .27, 35 and 40MHz

Australia
U.S.A.

......

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

.........

.27 & 35MHz AM and FM

.27 & 35MHz

27 & 72MHz

AM

AM/FM

and FM

29MHz

(amonly)

•The frequency of Futaba digital propor­tional sets can be changed among bands (1)
~ (6) on the 27MHz band only.

• However, a 27MHz band set cannot be
changed to 72MHz band, and vice versa.

•Therefore, always attach the correct fre­quency flag to the end of the transmitter
antenna. Each frequency band has its own
designated

FP-S128

color,

as

stated

in

the

left.

The

No.

1.

2.
3

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

17.

18

19.

20.

21.

22.

Upper case

Middle case

Bottom case
Metal bearing
Potentiometer
VR drive plate
Motor
Motor pinion
Motor mounting

screw 2x3

1st gear
2nd gear

3rd gear
Final gear
Intermediate shaft
2nd shaft
Servo horn D
Horn mounting screw

2.6 x 8
Printed wiring board
S128...3PBWRB300
Lead wire packing
Case mounting screw
Nameplate

The following splined horns are optional.

HORN A HORN B HORN C HORN D HORN E HORN F

frequency flag is intended for identifica­tion purposes.

•Also

change

the

quency is changed.

• Futaba paired crystals are precisely matched.
Always use a Futaba crystal set (transmitter,
receiver) when changing the frequency.

frequency

flag

when

• It is illegal to change crystals of transmitter
on the 72-75MHz bands in the U.S.A.

Part Name

Part No.

FCS-28

S04134
.39995
S02753
S91212

S02461

J60002

FGS-28

S02495

S02494
FSH-6W

FSH-4I

AS 1202

FPC-8M
S90045
J50400
S80700

• SPLINED HORNS

This horn permits shifting of the
servo neutral position at the servo
horn. Setting and shifting the neutral
position

a) Angle divisions

1) The splined horn has 25 seg­ments. 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 adjustable angle is:

b) Effect
To shift the holes center line to the

right (clockwise) relative to baseline
A, shift arm 2 to the position of arm

1 and set it to the position closet 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 opposite
arm number.
For a six arm horn, turn the arm
counterclockwise and set arm 2 to

the position of arm 1. The adjustable
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.

fre-

Fig.

10

• Furnished swing arm B is conveni­ent when the neutral position of
the swing lever is shifted approxi­mately 1/3 as shown in Fig. 11.

• Open the rear cover of the trans­mitter, and replace as shown in

Fig.

13

Fig. 11

Fig. 13

Furnished.