Futaba 4YF - Manual (Page 4)

3
FOR SAFETY
Extend the antenna to its
full length.
If the antenna is
collapsed, the ef-
fective range of
the radiowaves
w i l l b e c o m e
shorter.
Always test the digital proportional R/C
set before use.
Any abnormality in the digital proportional R/C set,
or model, may cause a crash.
*Before starting the engine, check that the
direction of operation of each servo matches
the operation of its control stick. If a servo
does not move in the proper direction, or op-
eration is abnormal, do not fly the plane.
Check that the transmitter antenna is not loose.
If the transmitter antenna comes off during use, control will be
lost and the model will crash.
(In case of a set w/ frequency board)
CAUTION
Do not touch the engine,
motor, and speed control
during and immediately
after use.
They are hot and will cause a burn.
When turning on the power switch
After setting the transmitter throttle lever to
maximum slow,
1. Turn on the transmitter power switch,
2. Then turn on the receiver power switch.
When turning off the power switch
After stopping the engine,
1. Turn off the receiver power switch,
2. Then turn off the transmitter power switch.
If the power switch is
turned off in the opposite
order, the engine may go to
full throttle unexpectedly
and cause an injury.
*Maximum slow: Direction in
which the engine or motor runs at
the slowest speed.
When adjusting the digital
proportional R/C set, al-
ways stop the engine, ex-
cept when necessary.
If the engine suddenly goes to high
speed, it may cause an injury.
When flying, always in-
stall the frequency board
to the transmitter an-
tenna.
When the frequency was changed,
also change the frequency board.
Test
When placing the transmitter on the
ground during flight preparations, be sure
that the wind cannot knock it over.
If it is knocked over, the throttle stick may be
pushed to full high and the engine will race and cre-
ate a dangerous situation.