Futaba 4GRS - Manual (Page 9)

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Warning
Do not operate outdoors on rainy days, run through puddles of water or use when visibility is lim-
ited.
Should any type of moisture (water or snow) enter any component of the system, erratic operation and loss of control
may occur.
Do not operate in the following places.
-Near other sites where other radio control activity may occur.
-Near people or roads.
-On any pond when passenger boats are present.
-Near high tension power lines or communication broadcasting antennas.
Interference could cause loss of control. Improper installation of your Radio Control System in your model could result in
serious injury.
Do not operate this R/C system when you are tired, not feeling well or under the influence of alco-
hol or drugs.
Your judgment is impaired and could result in a dangerous situation that may cause serious injury to yourself as well as
others.
Do not touch the engine, motor, speed control or any part of the model that will generate heat
while the model is operating or immediately after its use.
These parts may be very hot and can cause serious burns.
Always perform an operating range check prior to use.
Problems with the radio control system as well as improper installation in a model could cause loss of control.
(Simple range test method)
Have a friend hold the model, or clamp it down or place it where the sticks or prop cannot come in contact with any ob-
ject. Walk away and check to see if the servos follow the movement of the controls on the transmitter. Should you notice
any abnormal operation, do not operate the model. Also check to be sure the model memory matches the model in use.
Turning on the power switches.
Always check the throttle stick on the transmitter to be sure it is at the neutral position.
1. Turn on the transmitter power switch.
2. Turn on the receiver or speed control power switch.
Turning off the power switches
Always be sure the engine is not running or the motor is stopped.
1. Turn off the receiver or speed control power switch.
2. Then turn off the transmitter power switch.
If the power switches are turned off in the opposite order, the model may unexpectedly run out of control and cause a
very dangerous situation.
When making adjustments to the model, do so with the engine not running or the motor discon-
nected.
You may unexpectedly lose control and create a dangerous situation.
Before running (cruising), check the fail safe function.
Check Method; Before starting the engine, check the fail safe function as follows:
1) Turn on the transmitter and receiver power switches.
2) Wait at least one minute, then turn off the transmitter power switch. (The transmitter automatically transfers the fail
safe data to the receiver every minute.)
3) Check if the fail safe function moves the servos to the preset position when reception fails.
The fail safe function is a safety feature that minimizes set damage by moving the servos to a preset position when
reception fails. However, if set to a dangerous position, it has the opposite effect. When the reverse function was
used to change the operating direction of a servo, the fail safe function must be reset.
Setting example: Throttle idle or brake position
Operation Precautions