-3-
The function of each cord;
(1) Plug cord (meshed high tension cord)
As Fig.5 shows there are two cords available for two cylinders. When you put on the plug cap, insert it to the plug until you
can hear clicky sound to avoid coming off during flight. And then pull the plug cap to make sure that it wonʼt come off.
(2) Sensor cord (black /red/white cord)
Connect with the cord from the sensor attached to the engine.
(3) Battery cord (black/red cord)
Please use the fully charged battery that has adequate spec. (6-9V, more than 1000mA is recommended.). Between the
battery and main unit, make sure to set an ignition switch whose capacity is higher than 3A.
Fig.5 Ignition system
(FG57T-153A)
Recommended battery
5cell-NiMH
2cell-LiPo
Voltage:6-9V
Capacity: 1,000mA
以上
Switch (not included)
Capacity: more than 3A
Plug cap
Plug cord
Main unit
Battery cord
Sensor cord
Sensor
Fig.6
Neutral
Position
Hand start
easy
area
Delay
Spark
timing
Advance
Spark
timing
CCW
CW
Prop
rotation
(CCW)
View
from
front
7. Sensor position and Power / Starting easiness;
The ignition sensor can be moved to CW (advance the spark timing) or CCW (delay the timing) as Fig.6 shows.
At the factory default the sensor is fixed on the center (neutral) position. The reason is related to the methods of engine starting.
・With an electric starter-You can start wherever the sensor is fixed.
So you can set the sensor as the rpm reaches maximum speed.
・By hand flip (Manual start)-Starting easiness depends on the sensor position.
The factory default is set as you can start by hand flip and also get highest rpm in that range as possible.
If you prefer easiness of hand starting, move the sensor to CCW direction to delay the spark timing. But then the maximum rpm
will slightly decline.
If you prefer power (highest rpm), move the sensor to CW direction. But then you can't start by hand flip but only with starter.
In addition by the feature of the ignition system, it heats up with engine running. When you restart the engine by hand flip, you
should open the throttle valve slightly while it's hot. And it's better to enlarge the choke without wetting the plug.
For safety we recommend to use an electric starter.
Note：If the fuel remains in the carburetor after the flight, the components made from rubber such as a diaphragm will be
degraded more rapidly. When you stop the engine, stop it with fuel cut and see that the fuel does not remain in the
carburetor.
The carburetor for a gas-engine is elaborate and delicate. Please never disassemble it. If itʼs out of condition, please
consult the shop you bought from.
8. Carburetor
Equipped with a suitable carburetor by technical cooperation with “Walbro” that provides highly reliable carburetors for
other gas-engines. Please refer to Fig.9 and Chapter 13 regarding adjustment of the carb.
9. Engine mounting, muffler attachment, and breather
waste disposal (Fig.7)
FG-57TS can be installed flexible in the axial direction by
varying the length of stand-off mounts. As the carb comes
out from back of the firewall, hollow out the firewall as
possible as minimum referring to the cutting sheet included.
Make the firewall robust enough because this part has to
endure vibration and torque caused by prop rotation.
Especially with a low load prop, engine tend to generate
large vibration that is very dangerous.
It is preferable to apply some adhesives (such as screw lock)
on the tip of each cap screw to avoid looseness when you
install the engine.
To ensure that cooling wind passes through the engine, the
cowling should be devised. Also make the air flow outlet
larger than the inlet.
Building some baffles inside the cowling to flow the cool air through the surface of the
engine effectively that is highly recommended. Insufficient cooling may cause engine
trouble such as overheat or muffler looseness.
The mufflers should be securely inserted deeply into the angle adapter from the cylinder
and tightened up using spanners. (Adhesives, such as a screw lock agent, are effective
against looseness and leakage.)
Make sure to fix the outlet of the flexible mufflers outside of the cowling usind the
bracket included.
For breather treatment, there is also a method in which the aluminum pipe, etc. are fixed
at the muffler outlet to diffuse the hot air together with exhaust gas into the air.
(Breather may function by simply ejecting the tube from the engine).
Fig.7
From
Breather nipple
Exhaust
Muffler outlet
Aluminum pipe
Baffle
Cowling
Cool air
Firewall
Stand-off
mount
Adjustable
(Standard 35mm)
Hollow out
minimum area
