O.S. Engines 140RX-FI User Manual
It is of vital importance, before attempting to operate your engine,
to read the general 'SAFETY INSTRUCTIONS AND WARNINGS'
section on pages 2-4 of this booklet and to strictly adhere to the
advice contained therein.
Also, please study the entire contents of this instruction manual,
•
so as to familiarize yourself with the controls and other features
of the engine.
Keep these instructions in a safe place so that you may readily
•
refer to them whenever necessary.
It is suggested that any instructions supplied with the aircraft,
•
radio control equipment, etc., are accessible for checking at the
same time.
CONTENTS
SAFETY INSTRUCTIONS AND
WARNINGS ABOUT YOUR O.S. ENGINE
2-4
INTRODUCTION, FEATURES
BASIC ENGINE PARTS
CONNECTING WITH THE EC-1
EC-1 DISPLAYS AND EXPLANATIONS
LIST OF 140RX-FI USAGE CONDITIONS
INSTALLATION PROCEDURE
LINKAGE AND INITIAL SETTINGS
ENGINE STARTING AND
AIR-FUEL MIXTURE ADJUSTMENT
ENGINE STARTING
FLIGHT ADJUSTMENT
GLOW PLUG
CARE & MAINTENANCE
5
6
7
8-9
10
10-11
11-13
13
14-15
15-16
16
17
TROUBLESHOOTING
THREE VIEW DRAWING &
GENUINE PARTS & ACCESSORIES
EXPLODED VIEW
PARTS LIST
1
18
19
20
21
SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE
Remember that your engine is not a " toy ", but a highly efficient internalcombustion machine whose power is capable of harming you, or others, if it is
misused or abused. As owner, you, alone, are responsible for the safe operation
of your engine, so act with discretion and care at all times.
If at some future date, your O.S. engine is acquired by another person, we would
respectfully request that these instructions are also passed on to its new owner.
The advice which follows is grouped under two headings according to the
■
degree of damage or danger which might arise through misuse or neglect.
These cover events which might involve
WARNINGS
NOTES
serious (in extreme circumstances, even fatal )
injury.
These cover the many other possibilities,
generally less obvious sources of danger, but
which, under certain circumstances, may also
cause damage or injury.
WARNINGS
Never touch, or allow any object to come into contact with, the rotating
•
propeller and do not crouch over the engine when it is running.
A weakened or loose propeller may disintegrate or be thrown off and, since propeller
•
tip speeds with powerful engines may exceed 600 feet(180 metres) per second, it will
be understood that such a failure could result in serious injury, (see 'NOTES' section
relating to propeller safety).
Model engine fuel is poisonous. Do not allow it to come into contact with
•
the eyes or mouth. Always store it in a clearly marked container and
out of the reach of children.
Model engine fuel is also highly flammable. Keep it away from open flame,
•
excessive heat, sources of sparks, or anything else which might ignite it.
Do not smoke or allow anyone else to smoke, near to it.
Never operate your engine in an enclosed space. Model engines, like automobile
•
engines, exhaust deadly carbon-monoxide. Run your engine only in an open area.
Model engines generate considerable heat. Do not touch any part of your
•
engine until it has cooled. Contact with the muffler(silencer), cylinder
head or exhaust header pipe, in particular, may result in a serious burn.
2
NOTES
This engine was designed for model aircraft. Do not attempt to use it for
•
any other purpose.
Mount the engine in your model securely, following the manufacturers'
•
recommendations, using appropriate screws and locknuts.
Be sure to use the silencer (muffler) supplied with the engine. Frequent
•
exposure to an open exhaust may eventually impair your hearing.
Such noise is also likely to cause annoyance to others over a wide area.
Fit a top-quality propeller of the diameter and pitch specified for the engine
•
and aircraft. Locate the propeller on the shaft so that the curved face of the
blades faces forward-i.e. in the direction of flight. Firmly tighten the
propeller nut, using the correct size wrench.
Always check the tightness of the propeller nut and retighten it, if
•
necessary, before restarting the engine, particularly in the case of fourstroke-cycle engines. A safety locknut assembly is provided. Always use it.
This will prevent the propeller from flying off in the event of a "backfire",
even if it loosens.
If you fit a spinner, make sure that it is a precision made product and that
•
the slots for the propeller blades do not cut into the blade roots and
weaken them.
Discard any propeller which has become split, cracked, nicked or
•
otherwise rendered unsafe. Never attempt to repair such a propeller:
destroy it. Do not modify a propeller in any way, unless you are highly
experienced in tuning propellers for specialized competition work such as
pylon-racing.
Use an electric starter for this engine. The wearing of safety glasses is also
•
strongly recommended.
Take care that the glow plug clip or battery leads do not come into contact
•
with the propeller.
Also check the linkage to the throttle arm. A disconnected linkage could
also foul the propeller.
3
NOTES
Adjust the throttle linkage so that the engine stops when the throttle stick
•
and trim lever on the transmitter are fully retarded. Alternatively, the
engine may be stopped by cutting off the fuel supply. Never try to stop the
engine physically.
Take care that loose clothing (ties, shirt sleeves, scarves, etc.) do not come
•
into contact with the propeller.
Do not carry loose objects (such as pencils, screwdrivers, etc.) in a shirt
pocket from where they could fall through the propeller arc.
Do not start your engine in an area containing loose gravel or sand.
•
The propeller may throw such material in your face and eyes and cause
injury.
For their safety, keep all onlookers (especially small children) well back (at
•
least 20 feet or 6 meters) when preparing your model for flight. If you have
to carry the model to the take-off point with the engine running, be
especially cautious. Keep the propeller pointed away from you and walk
well clear of spectators.
Warning! Immediately after a glowplug-ignition engine has been run and is
•
still warm, conditions sometimes exist whereby it is just possible for the
engine to abruptly restart if the propeller is casually flipped over
compression WITHOUT the glowplug battery being reconnected.
Remember this if you wish to avoid the risk of a painfully rapped knuckle!
4
INTRODUCTION
This engine is the MAX-140RX-FI (fuel injection) engine equipped with a
revolutionary fuel supply system that was jointly developed by Futaba, a
manufacturer of Radio control equipment, and Ogawa Seiki, a
manufacturer of model engines.
This system detects engine speed with a sensor based on throttle
signals transmitted from a transmitter. It then determines the fuel
injection volume based on the required amount of fuel to be supplied for
that engine speed as calculated by an electronic control unit referred to
as the "EC-1", after which fuel is injected into the engine from an
injector. In addition, adjustments can also be made using dials on the
transmitter. The result is an F3A competition engine that features
excellent engine speed linearity relative to throttle operation under all
types of flight conditions.
FEATURES
Supplies the Proper Amount of Fuel at all Times
•Easier starting
•Greater stability during idling
•Excellent linearity and response relative to stick operation.
Simple Adjustment Using Dials on the Transmitter
•Air-fuel mixture at medium and high speeds can be safety and easily adjusted
from the transmitter.
•Adjustments can be made while on the ground and during flight.
Stable Supply of Fuel at all Times
Pressurized fuel is controlled at a constant pressure with respect to all types of
movement during flight allowing stable engine performance at all times.
Light Weight and Easy Installation
The sensor and injector mounted on the engine are both compact and
lightweight, while the electronic control unit (EC-1) is also lightweight, enabling
various connections to be made easily the same as plugging in a servo.
Monitoring of Flight Status
Maximum engine speed and maximum temperature during flight can be
viewed on the liquid crystal display of the electronic control unit (EC-1)
following completion of the flight, making it possible to use that data for future
reference.
5
BASIC ENGINE PARTS
Accessories
•Fuel Filter
•Check Valve
•Y harness
•Driver to push EC-1 keys
•Duble-sided sponge-backed
cushioning tape
Fuel Filter
Check Valve
Y harness
Electronic Control Unit<EC-1>
•The photograph may differ from the actual product.
Injector Air Valve 70C
Injector
Drive Hub
Crankshaft
Glow plug TYPE F
Cylinder Head
Crankshaft
Temperature Sensor
Pressure Fitting
Cover Plate
RPM Sensor
INSTALLATION OF THE AIR VALVE
As delivered, the engine has its air valve lightly fitted into its intake boss. Secure it as follows.
Loosen the retainer nut, rotate the air valve to its correct position and make sure that it is pressed
1.
well down into the intake boss, compressing the rubber gasket, before retightening nut.
Rotate the retainer nut gently until it stops, then tighten a further 90-120˚.
2.
Do not overtighten the screw as this will damage the thermo insulator.
✽
Injector
The injector consists of a solenoid valve with built-in regulator. It controls pressurized fuel at a
constant pressure and accurately injects fuel based on signals from the electronic control unit (EC-
Temperature Sensor
Never attempt to disassemble the injector.
It may not be able to be reassembled.
This measures the temperature of the engine exhaust unit.
RPM Sensor
The RPM sensor is provided with a power generating sensor. When the crankshaft passes in front
of the sensor, the signal that is generated is transmitted to the electronic control unit (EC-1).
Engine speed is then calculated based on that signal which is then used to determine the timing at
which fuel is injected.
Electronic Control Unit<EC-1>
The EC-1 transmits fuel injection signals to the injector to ensure the proper amount of fuel
injection based on basic fuel injection data that has been previously entered and constantly
changes wuth position of throttle stick. In addition, engine speed and engine temperature during
operation are displayed on the liquid crystal display.
Check Valve
Fuel Filter
Y harness
This one-way valve's function is to pressurize the fuel tank by crankcase
pressure and prevent fuel from returning to the engine crankcase.
This fine mesh filter prevents foreign matter from plugging the small injector
valve.
This cord is used to connect the receiver (throttle channel), throttle servo and EC-
(abbreviated as simply EC-1)
6
CONNECTING WITH THE EC-1
Connect the receiver and servo-related components (rudder section) in the same manner as in the
past.
(5) Rotation sensor input terminal (r.p.m.)
Temperature sensor input terminal (Temp)
(4)
(3) Injector output terminal (INJECTOR)
(2) Injection trim input terminal
(AUX TRIM)
(1) Injection time input terminal
(CH3:THRO)
Two extension cords (sold separately) of
a length corresponding to the airframe
[4] Data (-) decrease key (DATA-)
LCD contrast:
Turning to the right = darker,
turning to the left = lighter
[1] Function key (forward FANC )
[3] Data (+) increase key (DATA+)
[2] Function key (backward FANC )
(1) Injection Time Input Terminal (CH3 THRO)
Connect the y harness provided with the CH3 THRO input terminal to throttle channel (3) of the
receiver (throttle: CH3), connect the wiring connector from the throttle servo to one of the doubleopening connectors on the opposite side, and connect the other double-opening connector to
CH3:THRO of EC-1.
(Use the separately sold extension cord if the wiring cords are too short.)
(2) Injection Trim Input Terminal (AUX TRIM)
Connect a spare channel for dial use of the receiver (e.g. channel 7) to the AUX:TRIM terminal.
(Use the separately sold extension cord if the wiring cords are too short.)
(3) Injector Output Terminal
Connect the injector connector to the injector output terminal. Protect the lead wire with a heatresistant tube,etc. if it makes contact with the engine mount.
(4) Temperature Sensor Input Terminal
Connect the temperature sensor connector to the temperature sensor input terminal.
(5) Rotation Sensor Input Terminal
Connect the rotation sensor connector to the rpm input terminal.
Note:
Soft mounts may become soft due to excessively high temperatures leading to increased
vibration amplitude of the engine. Make connections so that the lead wire does not make
contact with the engine mount, manifold or airframe under any conditions.
are required for connecting (1) and (2).
Injector
Temperature Sensor
Rotation Sensor
Throttle Servo
EC-1
7
Branched Cord
Receiver
CH3
✽
AUX
✽
Spare Channel
Transmitter
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