Futaba 4YF User Manual
Thank you for purchasing a Futaba SKYSPORT 4YF.
Before using your SKYSPORT 4YF, read this manual carefully and use your R/C set safely.
After reading this manual, store it in a safe place.
See the glossary page 19 for a definition of the special terms used in this manual.
Application, Export, and Modification
1. This product may be used for model airplane use, if on the correct frequency. It is not intended for
use in any application other than the control of models for hobby and recreational purposes. The
product is subject to regulations of the Ministry of Radio/Telecommunications and is restricted under
Japanese law to such purposes.
2. Exportation precautions:
(a) When this product is exported from the country of manufacture, its use is to be approved by the
laws governing the country of destination which govern devices that emit radio frequencies. If this
product is then re-exported to other countries, it may be subject to restrictions on such export. Prior
approval of the appropriate goverment authorities may be required. If you have purchased this product from an exporter outside your country, and not the authorized Futaba distributor in your country,
please contact the seller immediately to determine if such export regulations have been met.
(b) Use of this product with other than models may be restricted by Export and Trade Control
Regulations, and an application for export approval must be submitted. In the US, use of 72MHz
(aircraft only), 75MHz (ground models only) and 27MHz (both) frequency bands are strictly regulated by the FCC. This equipment must not be utilized to operate equipment other than radio controlled models. Similarly, other frequencies (except 50MHz, for HAM operators) must not be used
to operate models.
3. Modification, adjustment, and replacement of parts: Futaba is not responsible for unauthorized
modification, adjustment, and replacement of parts on this product. Any such changes may void the
warranty.
The Following Statement Applies to the Receiver (for U.S.A.)
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation.
Battery Recycling (for U.S.A.)
The RBRCTM SEAL on the (easily removable) nickel-cadmium battery contained in
Futaba products indicates that Futaba Corporation of America is voluntarily participating
in an industry program to collect and recycle these batteries at the end of their useful
lives, when taken out of service within the United States. The RBRCTM program provides
a convenient alternative to placing used nickel-cadmium batteries into the trash or municipal waste system, which is illegal in some areas.
You may contact your local recycling center for information on where to return the spent battery.
Please call 1-800-8-BATTERY for information on Ni-Cd battery recycling in your area. Futaba Corporation of America's involvement in this program is part of its commitment to protecting our environment and conserving natural resources.
NOTE: Our instruction manuals encourage our customers to return spent batteries to a local recycling
center in order to keep a healthy environment.
RBRCTM is a trademark of the Rechargeable Battery Recycling Corporation.
Warning: This product contains a chemical known to cause cancer and birth defects (or other
reproductive harm).
•No part of this manual may be reproduced in any form without prior permission.
•The contents of this m anual are subject to change without prior notice.
•This manual has been carefully written. Please write to Futaba if you feel that any corrections or clarifications should
be made.
•Futaba is not responsible for the use of this product.
TABLE OF CONTENTS
FOR SAFETY ...................................................................................... 2
Meaning of Special Markings .........................................................................2
Precautions During Flight ...............................................................................2
Nicd Battery Charging Precautions ............................................................... 4
Storage and Disposal Precautions .................................................................. 4
Other Precautions ............................................................................................ 5
BEFORE USE ................................................................6
Set Contents ......................................................................................................6
Name and Handling of Each Part ................................................................... 7
Transmitter Operation and Movement of Each Servo ............................... 10
INSTALLATION AND ADJUSTMENT ..............................11
Connections ..................................................................................................... 11
Adjustments ....................................................................................................13
USING OTHER FUNCTIONS ........................................14
Using the Frequency Board ........................................................................... 14
Servo Horn ...................................................................................................... 14
Non-slip Adjustable Lever Head .................................................................. 14
Trainer Function ............................................................................................15
Charging the Nicd Battery ............................................................................ 16
REFERENCE ...............................................................17
Ratings ............................................................................................................. 17
Troubleshooting ............................................................................................. 18
Glossary ........................................................................................................... 19
1
FOR SAFETY
To ensure safe use, observe the following precautions.
Meaning of Special Markings
FOR SAFETY
following marks.
DANGER
WARNING
CAUTION
Symbol: ; Prohibited ; Mandatory
Do not fly simultaneously on the
same frequency.
Interference may
cause a crash.
*Use of the same frequency
will cause interference even
if the modulation method
(AM, FM, PCM) is different.
Do not fly on rainy or windy
days, or at night.
Pay special attention to the safety at the parts of this manual that are indicated by the
Mark Meaning
Procedures which may lead to a dangerous condition and
cause death or serious injury to the user if not carried out
properly.
Procedures which may lead to a dangerous condition or
cause death or serious injury to the user if not carried out
properly, or procedures where the probability of superficial
injury or physical damage is high.
Procedures where the possibility of serious injury to the user
is small, but there is a danger of injury, or physical damage,
if not carried out properly.
Precautions During Flight
WARNING
Do not fly in the following places:
-Near other R/C flying fields (within
about 3km)
-Near people on the ground, or objects
in the air
-Near homes, schools, hospitals, or
other places where there is a lot of
people
-Near high tension lines, high structures, or communication facilities
Radiowave interference and obstructions
may cause a crash. A crash caused by
trouble in the R/C set, or the model itself,
may cause death or property damage.
Water will penetrate
into the transmitter
and cause faulty operation, or loss of control, and cause a
crash.
Do not fly when you are tired,
sick, or intoxicated.
Fatigue, illness, or intoxication will cause a
loss of concentration or normal judgment
and result in operation errors and a crash.
2
Extend the antenna to its
full length.
Always test the digital proportional R/C
set before use.
If the antenna is
collapsed, the effective range of
the radiowaves
will become
shorter.
Check that the transmitter antenna is not loose.
If the transmitter antenna comes off during use, control will be
lost and the model will crash.
CAUTION
Do not touch the engine,
motor, and speed control
during and immediately
after use.
They are hot and will cause a burn.
Any abnormality in the digital proportional R/C set,
or model, may cause a crash.
*Before starting the engine, check that the
direction of operation of each servo matches
the operation of its control stick. If a servo
does not move in the proper direction, or operation is abnormal, do not fly the plane.
Test
When placing the transmitter on the
ground during flight preparations, be sure
that the wind cannot knock it over.
If it is knocked over, the throttle stick may be
pushed to full high and the engine will race and create a dangerous situation.
FOR SAFETY
When turning on the power switch
After setting the transmitter throttle lever to
maximum slow,
1. Turn on the transmitter power switch,
2. Then turn on the receiver power switch.
When turning off the power switch
After stopping the engine,
1. Turn off the receiver power switch,
2. Then turn off the transmitter power switch.
If the power switch is
turned off in the opposite
order, the engine may go to
full throttle unexpectedly
and cause an injury.
*Maximum slow: Direction in
which the engine or motor runs at
the slowest speed.
When adjusting the digital
proportional R/C set, always stop the engine, except when necessary.
If the engine suddenly goes to high
speed, it may cause an injury.
(In case of a set w/ frequency board)
When flying, always install the frequency board
to the transmitter antenna.
When the frequency was changed,
also change the frequency board.
3
FOR SAFETY
Always charge the nicd
battery before each flight.
If the battery goes dead during
flight, the plane may crash.
Ni-cd Battery Charging Precautions
(If using a Ni-cd battery)
Charge the digital proportional R/C nicd
WARNING
battery with the special charger, or digital proportional R/C quick charger, sold
separately.
Overcharging may cause burns,
fire, injury, blindness, etc. due to
overheating, breakage, electrolyte leakage, etc.
CAUTION
Do not use commercial nicd penlight
batteries.
During quick charging, the battery holder contacts may overheat and damage the equipment, or prevent charging.
Do not short the nicd battery connector terminals.
Shorting the terminals may cause sparking and
overheating and result in burns or fire.
Do not drop or apply strong
shock to nicd battery.
The battery may be shorted and cause
overheating or breakage and electrolyte leakage and result in burns or
damage by chemical mater.
Storage and Disposal Precautions
WARNING
Do not leave the digital proportional R/C set, battery, model airplane, etc.
within the reach of small children.
Touching and operating the digital proportional R/C set, or licking the battery, may cause
injury or damage due to chemical matter.
Do not throw the nicd battery into a fire or heat the nicd battery. Also, do
not disassemble or rebuild the nicd battery.
Breakage, overheating, and electrolyte leakage may cause injury, burns, or blindness.
4
When not flying the model, store the digital proportional R/C set with the
nicd battery in the discharged state. Recharge the nicd battery before the
next flight.
If a partially discharged nicd battery is recharged many times, its memory effect will reduce
the flight time substantially and may cause a crash, even if the battery is recharged.
Nicd battery electrolyte
The electrolyte in the nicd battery is a strong alkali and can cause blindness if it gets in the eyes. If you
get the electrolyte in your eyes, immediately wash your eyes with water and see a doctor. If you get the
electrolyte on your skin or clothes, it may cause a burn. Immediately wash it off with water.
FOR SAFETY
CAUTION
If the digital proportional
R/C set will not be used
Do not store the digital proportional R/C
set in the following places:
-Where it is very hot (40C/104F or more) or very
cold (-10C/-14F or less).
-Where the set will be exposed to direct sunlight.
-Where the humidity is high.
-Where there is strong vibration.
-Where it is dusty.
-Where there is steam and heat.
Storing the digital proportional R/C set in the places
above may cause distortion and trouble.
for a long time, remove
the batteries from the
transmitter and the
model and store them in
a dry place.
If the batteries are left in the transmitter and model, the battery electrolyte may leak out and degrade
the performance and shorten the
life of the transmitter and model.
Nicd battery recycling
Used nicd batteries are an important resource. Stick tape over the terminals and take the used batteries
to a nicd battery recycling center.
Other Precautions
CAUTIONS
Do not get fuel, waste oil,
etc. on plastic parts.
The plastic may melt and fail to
function.
Always use Genuine Futaba transmitter, receiver, servos, FET amp, nicd
battery, and other optional parts.
Futaba is not responsible for damage, etc. caused
by the use of parts other than Genuine Futaba
parts. Use the parts described in the instruction
manual and catalogs.
5
BEFORE USE
Set Contents
After opening the carton, first check if the following items are provided. The set
contents depend on the type of set.
Transmitter
BEFORE USE
Nicd Battery
or Battery
Receiver
Servo
Receiver
holder
R127DF
S3004
(x4)
NR-4QB
Charger
R148DF
S3101
(x2)
NR-4K
T4YF
Receiver Swich
Servo horn
R136F
(not for USA)
S3003
(x3)
Battery
holder
NR-4J
Others
If the set contents are incomplete, or if you have any questions, please contact the
dealer.
frequency board
Servo tray
Neck strap
Extension cord
6
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