Saito FG-17, Owner'S Operating Instruction Manual

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7
ignition System
Saito gasoline four-stroke engines come with Saito’s
own ignition system composed of the ignition unit,
cord for sensor (black, red and white ), insulated
plug cap, and cord for battery (black and red).
(Battery not included.)
You will also need to secure an ON/OFF switch
(safety switch system). The switch must carry a
rating of 3 amps. Be sure to mount the ignition
system in a location near the engine and away from
the receiver to prevent any unwanted interference.
Please refer to the diagram below. Saito
recommends the use of a 5-cell Ni-Cd, Ni-MH
battery with a voltage of 6V, or 2-cell Li-Po
battery with a voltage of 7.4V and rated to a
minimum 1000mA.
Cord for plug(mesh)
Plug cap
Sensor
Battery
Cord for
ignition sensor
Cord for
Tachometer display
Cord for battery
Switch (capacity
more than 3A)
Unit
Battery
Voltage [6–8V]
(5-cell Ni-Cd/Ni-MH or 2-cell Li-Po)
Capacity: more than 1,000mA
Using Propeller Size to Decrease Fuel consumption
Selecting the correct propeller for your engine and
airframe maximizes both the performance of your
aircraft and the life of your engine.
• Select a propeller that maximizes the engine RPM
at full throttle.
• Install the engine on an aircraft that performs at
90% of the maximum RPM range. For example,
select a propeller for the FG-21 that turns
approximately 9,000 RPM at full throttle.
• Install the engine and propeller in an aircraft that
performs at 8,100 RPM.
If the propeller diameter or pitch is too large, you
will need to richen the air-fuel mixture, increasing
the fuel consumption. If the propeller diameter or
pitch is smaller, the air-fuel mixture will be leaner,
decreasing the fuel consumption.