RadioLink Electronic Limited
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4.1.2 How to disarm
When the flight is finished, always make sure F121 Pro is disarmed when get close and try touching it to avoid
unexpected harm. Always be sure about turning off F121 Pro before T8S.
Press the CH7 switch (the 3-way switch on the left of T8S) towards the front of T8S, the green LED of F121 Pro
is off means disarm successful. When the transmitter is T8FB, put the CH7 switch (the 2-way switch on the left)
to the bottom position to disarm. If you use the other transmitter except the T8S or T8FB to control the F121 Pro,
set a 2-way switch to control the CH7, and when the switch at the bottom position, the green LED of F121 Pro is
off means disarm successful.
4.2 Altitude Hold Mode
4.2.1 Rise/Descend
Press the CH5 switch of T8S backward, which makes F121 Pro fly at Altitude Hold Mode. Make sure the orange
propellers at front when powering F121 Pro on. Then arm F121 Pro and push the throttle joystick vertically
upward higher than center position, then the F121 Pro will rise while if push it vertically downward, then the F121
Pro will descend.
4.2.2 Hover
Push the throttle joystick vertically upward till the F121 Pro rises to a height as wish, then toggle it back to center
position and release, the F121 will hover at this height.
