O.S. engine GT120T Скачать руководство пользователя страница 2

Fuel Inlet

CARBURETOR PARTS NAME

High Speed Needle

Slow Speed Needle

Throttle Valve Lever

Choke Valve Lever

Throttle Valve Lever

Retaining Screw

Choke Valve Lever

Retaining Screw

CARBURETOR LINKAGE

Before connecting the throttle linkage, make sure 

that the throttle valve lever does not interfere with 

the bulkhead or mount of the model when it is fully 

closed and opened.
In order to obtain suitable idling, connect the throttle 

linkage so that the throttle valve lever may be 

located at 4 to 5 degrees opened position from fully 

closed position when the throttle stick on the 

transmitter is fully pulled down, and the throttle valve 

may be fully closed when the throttle stick as well as 

the rim lever on the transmitter are fully pulled down 

or engine cut-off mixing is operated.
Connect the linkage so that the throttle valve is fully 

opened when the throttle stick on the transmitter is 

fully advanced. (Adjust the movement so that the 

pushrod does not bind when the throttle valve is fully 

closed and fully opened.)
Connect the linkage so that the servo arm and 

pushrod, and throttle valve lever make a right angle 

when the throttle stick on the transmitter is placed at 

mid position to avoid differential action.

Consumption current is 500mA / 6V / 6,000rpm. 

User a power source of more than 1000mAh capacity.
The ignition module is set not to operate below 

120rpm for safety.
The voltage of power source is 6~11.1V (rated). 

(Ni-Cd, Ni-MH 5~9 cells, Li-Po, Li-Fe 2~3 cells)

IGNITION MODULE

Major specifications

Installation

Install the ignition module taking sufficient 

anti-vibration measures.
Install the ignition module at least 100mm away 

from the engine and in a place where there is airflow 

so that engine exhaust heat and radiation heat do 

not affect it's operation.
Do not share the power source with receiver and 

use a separate power source.
Equip an ON/OFF switch between the ignition 

module and its power source and install it in a place 

where can be operated from outside the model.  
Install the ignition module and its power source as 

far as possible away from the servos and receiver 

power source.
Connect the sensor leads of the igniter module to 

the sensor leads from the engine. 
Connect the battery leads of the igniter module (red, 

black two parallel wires) to the power source.
Make sure the jackets of high tension cord does not 

touch the engine and cowl to avoid accidental short 

circuit.
Install he plug cap on the plug securely.

Precautions

Do not disassemble the ignition module and plug 

cap. (The ignition module and high tension cord is 

irreparable. Replace it when necessary.)
Be careful not to mount the ignition module so that it 

can be hit by water, gasoline or exhaust.
Avoid using the engine when the external 

temperature is over 50 C.
Do not move the rpm sensor as it is placed at it's 

optimum position, otherwise the engine will not run 

properly.
Do not pull on the high tension cord to remove the 

plug cap, or the inner wire will break.  Be sure to 

hold the plug cap to remove it. Wear gloves not to 

damage your fingers while removing it.
Do not connect nor disconnect the rpm sensor with 

the ignition module on, or there is a possibility it will 

fire and the engine start.

Check the ignition module for spark when installing 

the plug cap on the plug and be careful about 

getting a shock. Make sure there is no flammable 

material or gasoline vapors near by that could 

ignite.
Do not turn the propeller with the ignition module 

on, or there is a possibility the engine will start.

PROPELLER

The choice of propeller depends on the design and 

weight of the aircraft and on the type of flying in which 

you will be engaged. Determine the best size and type 

after practical experimentation. As s starting point, 

refer to the props listed in the table shown below. 

Slightly larger, or even slightly smaller props than those 

shown in the table may be used, but remember that 

propeller noise will increase if blade tip velocity is 

raised due to high rpm or if a larger diameter/lower 

pitch prop is used. Be well aware propeller rotating arc 

is very large due to a large propeller used with this 

engine.  Carry out the needle adjustments only after 

stopping the engine. Do not allow your face or hands to 

come close to the rotating prop.

Type

Size (DxP)

Running-in

Acro/Scale

Warning:

Make sure that the propeller is well balanced. 

An unbalanced propeller and/or spinner can cause 

serious vibration which may weaken parts of the 

airframe or affect the safety of the radio-control system. 

Do not use any propeller which has become split, 

cracked or nicked even very slightly, or received 

strong impact even if no apparent damage is visible.

PROPELLER  & SPINNER ATTACHMENT

Since the GT120T is intended to be started with an 

electric starter, the addition of a spinner assembly for 

centering the starter sleeve is desirable. Special 

propeller locknut sets are available for use with 

spinners. Use a good quality well balanced spinner, 

enclosing the propeller boss. Make sure that it is of 

precision-made and sturdy construction so that the 

spinner shell cannot loosen when the starter is used.

Make sure the spinner notches do not interfere the 

propeller. If they do, cut the notches to clear.

MIXING OF OIL

Use regular gasoline. (No need to use high octane 

gasoline.)
Alcohol based glow fuel cannot be used in this 

engine.  Not only will the engine not work properly 

but the internal carburetor plastic parts will be 

damaged.
Use high quality commercially available 2 stroke 

engine oil.

Follow  the  oil  manufacturer’s  recommendations 

concerning the mixture ratio of gasoline and oil. If 

there is no recommendation, mix with a 25:1 ratio.

We have checked the following oil mixture ratio. 

KLOTZ ModelLube (50:1),  AMSOIL SABER  pro-   

fessional Synthetic 2-Stroke Oil(100:1), RED LINE 

Two-Stroke Racing Oil (50:1). (This does not mean 

we guarantee the quality of these oils.)

Follow the instructions in the running-in section 

concerning the mixture for running-in.
With a gasoline engine, passages in the carburetor 

are narrower than that of a glow engine, and 

therefore very sensitive against foreign matter such 

as dust. It is suggested to use optional accessory 

Super Filter L (Code No. 72403050) when filling a 

tank in the model from a container used for 

transportation or storing.

Attach the throttle valve lever and the choke valve to 

the carburetor using fixing screws. The positions of 

the throttle valve lever and the choke valve lever are 

adjustable. Make sure not to interfere other 

carburetor parts when fully open/close the valve 

levers.

Be sure to install an in-line fuel filter code No.78300000 

(optional) between the tank and carburetor to prevent 

foreign matter in the tank from entering the carburetor. 

Clean the filter periodically. 

Use a wooden or a carbon fiber propeller.  

Do not use a nylon propeller.

If the supplied retaining screws are too long due to a 

thinner prop hub or too short due to a thicker prop 

hub (cannot be screwed into the drive hub by more 

than 10mm), Use suitable length strong steel hex 

socket head cap screws.
Install the propeller before the first flight of the day 

and remove it after the day’s flight.

Make a habit of always checking the tightness of 

propeller retaining screws making sure they are free 

of, damage or rust before starting the engine.  

Replace the propeller periodically (every 50 flights) 

even if it looks as ifs nothing is wrong.

Use a fuel with increased oil content and set the 

needle a little on the rich side. Too rich a needle 

setting may cause misfiring or erratic running due to 

fouling of the plug.
Use a 25:1 fuel/oil mixture if the particular brand of 

oil states 50:1 mix. Use a 20:1 fuel/oil mixture if the 

particular brand of oil states 25:1 mix. Set only the 

high speed needle 200 below maximum rpm. The 

low speed needle need not be richened.
No need to carry out running-in on a bench nor with 

the model fixed.  Just fly the model with the above 

mentioned fuel and needle setting.
A total of 10 flights (8~10 litters fuel) are required. 

Avoid prolonged full throttle running at initial stage, 

and gradually extend the full throttle running time.

RUNNING-IN / STARTING

WARNING:

When ground running the engine, avoid dusty or 

sandy locations.  If dust or grit is drawn into the 

engine, this can have a ruinous effect, drastically 

shortening engine life in a matter of minutes.

Throttle Valve

Choke Valve

Use fuel line keepers of stainless wire, etc. at the 

end of the tubing to prevent at from coming off.

Be sure to use a gasoline

resistant fuel tank cap.

Be sure to equip

air vent pipe.

Be sure to replace tubing

inside periodically.

tubing for

re-fuelling

Be sure to use fuel line keepers of

stainless wire, etc. to prevent tubing

from coming off.

To carburetor

fuel inlet

For plumbing use TYGON   F-4040 (Yellow color) or 

strong nitrile rubber of more than 3mm ID and 6mm 

OD. Replace tubing periodically as it becomes 

hardened. Replace tubing inside the fuel tank every 

six months. We recommend code No.28382200 

Fluoro rubber tube (3 x 5 x 500mm, optional) to use.

This engine does not require a muffler pressurized 

fuel system but be sure to provide an air vent.

ATTACHING THE THROTTLE VALVE LEVER AND

THE CHOKE VALVE LEVER

26×12, 27x10
26×11-13, 27×9-12

28×8-10

Содержание GT120T

Страница 1: ... installing it in the model or there is a possibility of injury Be sure to use an effective silencer muffler 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 Mount the engine in your model securely following the manufacturers recommendations For their safety keep all onlookers especially small children w...

Страница 2: ...stem Do not use any propeller which has become split cracked or nicked even very slightly or received strong impact even if no apparent damage is visible PROPELLER SPINNER ATTACHMENT Since the GT120T is intended to be started with an electric starter the addition of a spinner assembly for centering the starter sleeve is desirable Special propeller locknut sets are available for use with spinners U...

Страница 3: ...nce reliability and long life Check the tightening of each screw especially engine installation screws and silencer installation screws each time Also for the first 4 to 5 flights tighten the screws after each flight Cooling is more vitally important to a gasoline engine than to a glow engine If overheating symptoms loss of power at full throttle or exhaust note at mid speed changes from cloudy on...

Страница 4: ...ngine SPECIFICATIONS C Copyright 2017 by O S Engine Mfg Co Ltd All rights reserved Printed in Japan 60093430 011800 1 2 3 4 5 6 7 8 8 1 8 2 9 10 11 11 1 12 13 14 15 16 17 18 19 20 28603100 28614000 28603401 28603200 29706000 29717000 28602100 4AB08000 29708100 29708200 29332000 4AB01000 74002A20 74002321 28631000 4AB02000 26730005 4AB01800 4AB28000 4AB18000 4AB15000 4AB21000 4AB81000 4AB81410 7400...

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