RadioLink Electronic Limited
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3.2 Propellers and Propeller Protectors Installation
F121 Pro is installed propellers protector by factory default, you can follow the steps below if you need
change them. To ensure a safety flight, it’s strongly advised to check if the protectors are well installed.
①
Find the two notches respectively on the motor protector
and propeller protector as image on the right.
②
Put on the propeller protector from the bottom and adjust
the position of the notches correspondingly.
③
Stabilize the frame with left hand and buckle the notch
of one side with right hand. Then buckle the notch of the other
side with left hand. A “DA” sound will be heard if the installation is done with success.
④
Extra 4 screws are in the package and pilot can installed on the propeller protector as prefer.
Note
After the installation of the four propeller protectors, double confirm if they are leaning or slightly shake
F121 Pro to see if they drop. If they are crooked or drop, repeat the above steps to ensure the well installation.
Propeller installation can be skipped as the whole F121 Pro is already assembled by factory default. If the
default propellers get worn and needs to be replaced after a period of flight, it is important to well identify the
rotation direction of propellers. If installed incorrectly, F121 Pro can’t take off even the throttle is pushed to max.
In order to identify the propellers rotation, take a propeller and observe there’s a radian at both sides of the
small cylinder in the middle. The higher part (also called windward side) of the right propeller is at the front and
the rotating motor will make propeller rotate counterclockwise (CCW). On the contrary, that is clockwise (CW)
rotation. For the 65mm GEMFAN propellers used on F121 Pro, there are two marked with a letter R, meaning
they should be installed on the motors of clockwise.
When the installation is done, make sure the four motors are vertical to the aircraft frame. If necessary, adjust
them to vertical positions, otherwise F121 Pro may not flight successfully.
Screw Installation
