FUTABA FP-7NFK User manual

Futaba.
DIGITAL PROPORTIONAL RADIO CONTROL
INSTRUCTION MANUAL
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FUTABA CORPORATION OF AMERICA
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FOR AIRCRAFT, FM 7 CHANNELS SYSTEM.
Thank you for purchasing a Futaba digital proportional
radio control set.
Please read this manual carefully before using your set.
|] FEATURES OF FP-7NFK Transmitter (FP-T7NFK)
@ Aileron and Elevator D/R (dual rate). 2 sticks 7 channels transmitter
@ ATL (adjustable throttle limiter) for throttle. +4
@ Servo reversing switch. ses MANTAP OMENAN
@ AST (Adjustable servo throw) for aileron, elevator, and rudder. s y
@ ATV (Adjustable travel volume) for throttle. Modulation : FM
@ Elevon mixing.
@ Aileron-— Rudder mixing. . :
® Trainer system. (Trainer cable optional) Power requirement :9.6V Nicd battery pack
@ Stick spring tension can be adjusted. Current drain : 200MA
@® Nonslip adjustable stick lever head.
@ Neck strap hook
@ a to ~ square tevel meter. (transmitter battery voltage/RF Receiver (FP-R127DF)
indicator
E
a
|
® Rugged low-profile servo. (FP-S148)
@ Nicd battery operation as standard. Receiving :72MHz, 50MHz band |
frequency
Intermediate : 1st IF 10.7MHz, 2nd IF 455kHz
frequency
Power requirement :4.8V Nicd battery pack (shared with
[2] ser CONTENTS AND RATINGS mn a aes
(Specifications are subject to change without prior notice.) Current drain :10.0mA at 4.8V
SK ] z j y
aR | | i ions : 64.3x35.8x21.0mm, 40.5
s FP-7NFK E and X X g
sa | g
| l a ~ o o | Receiving range : 500m on the ground, 1000m in the air.
| Transmitter | FP-T7NFK : (range differs with the surroundings)
Receiver
pane
tay
|
Servo(FP-S148)
Servo | FP-S148 (x4) Control system : + pulse width control
ee Operating angle : Rotary system, one side 45 or greater
H . | . .
Batt d ® Transmitter battery NT-8IB | a tam l l
AS gel @ Receiver battery NR-4J | Power requirement :4.8V or 6.0V(shared with receiver)
narge @ Charger FBC-8B(4) : |
| Current drain :8mA at 6V(at idle)
eae | o Output torque : 3Bkg*cm
EN i set(T n ipese | Operating speed : 0.22sec/60°
© crystal set (Transmitter an eceiver
However the crystal type for dual | ene eons and :40.4x19.8x36mm 44.4g
conversion receiver is the following type. | weight
Crystal 72MHz Band
TYPE 72-10 |
50MHz Band | stated On RS) | Nicd battery (NT-8IB/NR-4J)
TYPE 50-10.
Voltage :9.6V(NT-8IB), 4.8V(NR-4J)
a Capacity : 500mAh
eSwitch @Extension cord @Spare horn Di iO s NR-
Others @ Servo tray @Neck strap © Flag board ciont oae SSR Om, 2S9] ia
S | |

| 3 | BEFORE USING
Charging the transmitter and receiver Nicd battery. Wi Use the special Futaba charger.
ee if charging in more than the specified current, the
transmitter may be unrepairable.
However when the battery was not used for some
time, charge and discharge it 2-3 times. Otherwise,
the battery will not be charged even after the |
Receiver
specified
charging
time.
Nicd battery
A fully-charged transmitter battery can be used for about 10
flights of 10 minutes each. The airborne NR-4J Nicd
battery pack can be used for about 8 flights when 4 servos
are used.
Transmitter 7S
Nicd battery
NT-8IB(inside) Power plug
M@ Receiver and servos connections.
CH6
Flap servo
CH5
Landing gear servo
CH4
Rudder servo
FM receiver
FP-R127DF
Extension cord
Receiver switch JN
r
Charging
jack
OS
Four
servos
are
supplied
a | as standard
Futaba
POWER PACK
NR-4 9
Nicd battery pack |
NR-4J
Pay careful attention
to the polarity
of the connector.

[4 J Function AND SETTING METHOD
Landing gear
switch(MODE II)
AlL.—RUD. MIX switch
(MODE IT)
Elevater dual
CH6 knob
(Flap) Se Antenna CH7 knob
Trainer
switch
|
Level
meter
Sy’
Carrying
bar
(Auxillary)
AlL.—RUD. MIX switch Trainer
(MODE IT) jack
Landing gear :
switch (MODE I)
Ay —Aileron dual switch
switch
by,
hy
| $a—Neck strap hook
Throttle trim iy
lever(MODE II) ZA Elevator trim
Elevater trim l FA \ever(MODEII)
lever(MODE 1) ia py Throttle trim
Sy ma \ever(MODE I)
| r
2E pG
Throttle PA ..
(MODE
II)
|
pA
Ha
Teer
Elevator Gy
(MODE I) Uy
by)
a Charging jack
Gy
Rudder 4 i J Battery cover
Power switch Transmitter Nicd battery NT-8IB
Rudder trim ,
lever Aileron
Elevator (MODE II)
Throttle (MODE I )
Nonslip adjustable
lever head
Panel
cover
(Panel)
Throttle
ATV trimmer AST trimmer
(HIGH/LOW) (AIL./ELV./RUD.)
SERVO > THROT.
REVERSER
“T
ELEVON
=p
ary
TAR
AST
MIXING
HIGH J AIL
e, | 2 ADJUBTABLE AiL. ELEVON
REVERSE jon | {=X KID SERV B RUD.
IF I THRO MIX
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ELV. | AIL. ELV. RUD. 104 102 20)
ELEVON AIL.—RUD. MIX
mixing switch mixing rate trimmer
Servo reverse D/R trimmer ELEVON
switch (AIL./ELV.) mixing rate trimmer
(CH1-CH7) (12/21)

MISERVO REVERSER:::::: (CH1-CH7)
This function is used to change the direction of servo operation in
relation to control stick, switch, or knob movement.
SERVO
REVERSER
Up side— Reverse
Down side—Normal
REVERSE (Forward)
GHGG000
12345
NORMAL
<CH No.
(CH1-CH7)
(Servo reverse switch)
Mi AST(Adjustable servo throw):::::: (CH1, CH2, CH4)
This function is used to adjust servo travel limit.
The servo throw can be adjusted within this range with the
AST trimmer.
METHROT. ATV(Throttle adjustable travel volume):::::: (CH3)
This function is used to adjust servo travel limits. Servo travel can
be adjusted independently in each direction from neutral.
The servo throw can be separately
adjusted within this range with the
ATV trimmer.
(ATV trimmer)
WATL(Adjustable throttle limiter)------ (CH3)
This function is used to shift the idle position of the throttle servo.
Throttle
The servo throw can be See
adjusted within this range High
with the throttle trim lever.
Throttle
HICH6 and 7 control knobs
WD/R(Dual rate)------ (CH1, CH2) .
This function allows the modeler to switch servo travel limits during
flight, thus varying the control sensitivity for different flight
conditions or maneuvers.
—
D/R switch
Servo
(D/R trimmer)
When the dual rate switch is ON, the servo throw can be
adjusted within this range with the D/R trimmer.
MELEVON:::::- (CH1— CH2, CH2->CH1)
This mixing can be used with delta wing, tail-less aircraft, flying
discs, etc.. When this mixing switch is ON the aileron and elevator
functions are mixed together. Each stick can affect both the aileron
servo and the elevator servo.
Aileron
B stick
OFF
(Mixing rate \
\ trimmer
(Mixing)
\switch/
Elevator
stick
(Mixing rate \
\trimmer —/
When this mixing switch is ON, the mixing amount can be
adjusted with the mixing rate trimmer.
MAIL. RUD. MIX:----- (CH1—CH4)
Large high wing aircraft may require the use of both the aileron and
the rudder to make it turn properly during flight. When this mixing
switch is ON the two functions are mixed together. The aileron stick
can affect both the aileron servo and the rudder servo.
AIL.— RUD. MIX
switch
y
ON
CH1
servo
` DN
D
C7 :
10 4
Right
Left
(Mixing
rate
\
Aleron
\trimmer
/
stick
104
(Mixing rate \
\trimmer /
When this mixing switch is ON, the mixing amount can be
adjusted with the mixing rate trimmer
Rotating the knob from the center position to the left or right stops will cause the servo to travel to it’s left or right limit.
(Relative direction is dependant on the servo reverse switch setting.)

PRECAUTIONS
@ Connect the receiver, servos, switches and battery
as shown in the figure. Extend the transmitter and
receiver antennas to their full length.
@ Turn on the transmitter power switch, then turn on
the receiver power switch.
The servos will go to their neutral position. Move
the transmitter sticks one at a time to check that
each servo follows its control stick movement.
@ Connect the pushrods to the servos and check that
the direction of travel of each servo matches the
direction of movement of its control stick. If a servo
does not move in the proper direction, switch its
direction with the servo reversing function.
@ Operate each servo horn over its full stroke and
check that the pushrod does not bind or is not too
loose. Unreasonable force applied to the servo horn
will adversely affect the servo and drain the battery
pack very quickly. Make the travel of each control
mechanism somewhat larger than the full stroke
(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 not completely
immune to noise. The use of noiseless parts is
recommended.
@ When installing the switch harness, cut a rectangu-
lar hole slightly larger than the full stroke of the switch
and install the switch so that it moves smoothly
from ON to OFF. Also do this when the switch is
installed inside the fuselage and is turned on and
E SERVO HORN MOUNTING SCREW PRECAUTIONS
Horn mounting screws table
Horn mounting screw Dimensions
Applicabl T
ue ype! tov
2.6x6 + tapping S133, S143 series
f 7.9
S129 series Â
S130 series, S9101, $5101
S128 series
S132 series
S135 series, S9601
2.6x8 : tapping
$138 series
S148 series
ee ! ett $131S series, $136G
7 : l
“@PPINS | $9201, $9301. $9401
2.6x12 | tapping $134 series, $3301
2.6x5 | machine
Note
@lf screws longer than necessary are used, the final gear may be broken or the potentiometer may be damaged or may fall out.
off from the outside with a piece of wire.
Install the switch where it will not be exposed to
engine oil or dust and dirt.
@ Although the antenna appears to be too long, do not
cut it or fold it back.
@ Install the servos securely. Tighten the mounting
screws until the rubber damper is crushed slightly.
If the screws are too tight, the cushioning effect will
be adversely effected.
@ The crystal can be changed from the outside of the
receiver case.
@ The FP-R127DF is a dual conversion receiver. This
receiver requires a special crystal so please order
the correct crystal set.
@ Spare servo horns are supplied. Use them as needed.
@®Use extension cords matched to the model.
@Wrap the receiver in sponge rubber. Place it inside
a waterproof plastic bag and secure the end of the
bag with a rubber band. Do the same with the air-
borne battery pack.
@ Use the rubber bands wrapped around the receiver
to hold the servo and switch leads.
@ After installation and checking are complete, perform
a range check by collapsing the transmitter antenna
and extending the receiver antenna to its full length
and operating the transmitter from a distance of 20
to 30 meters from the receiver. The servos should
operate normally at this distance.
* Differs with the weather and surroundings.
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W Digital Proportional Frequencies (FOR U.S.A.)
@ The frequency of Futaba digital proportional sets can be changed within their own band. There are 2 different bands for you to
choose from (27 MHz and 72-75 MHz.) Please see chart listed below for specific frequency and its intended use. Please note -
there are specific frequencies allocated for aircraft only and surface only use.
@ The frequency can be changed within the same BAND by using a precisely matched pair of Futaba crystals. However, Futaba
recommends that you return your system to our factory service department for frequency changing, as tuning may be necessary
for proper operation, Changing frequency from one band to another is NOT possible.
@ Always change frequency flag when frequency is changed. The frequency flag is to be attached to the top of antenna and the
channel designation to the base. (See Drawing)
@ It is illegal to change crystals on 72-75 MHz bands in the U.S.A. unless performed by a licensed technician.
W Antena Frequency Flag
Attach the frequency flag to the flag holder
as shown in the figure.
26-2 7MHz-Aircraft/car/boat
26.995
27.045
27.095
27.145
27.195
27.255
Color
Brown
Red
Orange
Yellow
Green
Blue
50/53MHz-Aircraft/car/boat-Fcc Amature
Licence required (2 and 3 channels not
produced on these frequencies.) i
50.800
* 50.820
50.840
* 50.860
50.880
* 50.900
50.920
* 50.940
50.960
* 50.980
53.100
53.200
53.300
53.400
53.500
53.600
53.700
53.800
Channel No.
RCOO
RCO1
RCO2
RCO3
RCO4
RCO5
RCO6
RCO7
RCO8
RCO9
Color
Black-Brown
Black-Red
Black-Orange
Black- Yellow
Black-Green
Black-Blue
Black-Violet
Black-Gray
* Effective JAN 1. 1991
The flag can be attached to,
and removed from, the
i
Sti
a
antenna
with
one
touch.
DStick
the
channel
No.
sticker
on the flag board.
Attach the flag board to the
antenna as shown in the
figure.
75MHz-Car/boat only
* 75.410 ; * 75.810
75.430 75.830
* 75.450
75.470
* 75.490
75.510
* 75.530
75.550
* 75.570
75.590
* 75.850
75.870
* 75.890
75.910
* 75.930
75.950
* 75.970
75.990

W Non-slip adjustable lever head adjustment
The length of the lever head can be changed.
Unlock lever heads(A)and@®) by turning them in opposite
directions as shown by the arrows and adjust the stick to
the most comfortable length.
Lever head (A) — ~ Lever head ®)
Wi Stick lever tension adjustment
1. Remove the transmitter back cover. ea ee 2. Adjust the spring strength.
the back cover.
=A
he AN
Rudder
A
Aileron
ELevator
(MODE II)
ELevator
(MODE I)
TTT SS
|
Le
Set to the desired spring Use a small Phillips
strength by turning the screw screwdriver.
of each stick.
W Trainer function (Trainer cable optional)
1. Connection to transmitter.
Instructor transmitter
Trainer switch
to Trainer jack —»
to Trainer jack —>
Trainer cable
(6-conductor)
Student transmitter
2.Operating at the instructor side
Operation is possible by turning on the instructor
transmitter power switch. [Note]
At this time turn off the trainer switch. ® Operation is impossible if the instructor transmitter
modulation mode and student transmitter modulation
mode is different.
@ Always turn off the student transmitter power switch.
3. Operating at the student side Do not operate the trainer switch either.
Operation is possible at the student transmitter while the @ Use the functions of the other two transmitters with the
trainer switch at the instructor side is held in the ON same setting.
state. @ Extend the instructor transmitter antenna.

E 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 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 center
line. For four arms, the minimum
adjustable angle is;
360° +(25 x 4)=3.6°
err
Number of divisions
SERVO EXPLODED VIEW
FP-S148
b) Effect
b\ Baseline A
a TO
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
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.
FUTABA
N7
For a six arm horn, turn the arm
counterclockwise and set arm 2 to
the position of arm 1. The adjus-
table angle is 60°- (14.4 x 4)=2.4°
HORN B HORN C
(FSH-6X) (FSH-6S) (FSH-6R)
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.
Part No.
No. Part Name
| 1 | Upper case
2 | Middle case
rer ae
3 | Bottom case
4 | Metal bearing
5 | Metal bearing
6 | Potentiometer
7 Potentiometer drive plate
8
| Motor
| $91239
| 9 | Motor pinion S02461
10 | Screw | J50002
S504137
S804136
139668
S802753
11 | tst gear
12 | 2nd gear
—
FGS-48
| 13 | 3rd gear
14 | Final gear
15 | Intermediate shaft
16 | 2nd shaft
17 | Servo horn D
Binding head tapping screw 2.6 x 8
FGS-48
802495
an ia
S02494
FSH-6W
FSH-41
AS1157
19 | Printed wiring board
20 | 3PB-WRB300G
w/gum bush
AT2453
9390045
21
Pan head truss screw
23 | Nameplate
550360
960099
FUTABA CORPORATION OF AMERICA
4 Studebaker, Irvine California 92718, U.S.A.
Phone: [phone] Telex:23-0691227 Facsimile: 714-455-9899
FUTABA CORPORATION
Makuhari Techno Garden Bldg., B6F 1-3 Nakase, Mihama-ku, Chiba 261-01, Japan
Overseas Marketing & Sales Radio Control Systems
Phone: [phone] Facsimile: [phone]