Propeller on Motor Assembly

Product Name	C31/C40
Workstation	Propeller Blade Assembly

Name	Part Number	Quantity	Description
Propeller Blade CW	201-002789	4	2 pieces per pair
Propeller Blade CCW	201-002790	4	2 pieces per pair
Main Propeller Hub Clamp Washer Assembly	754-000063	16
Propeller Clamp Washer Assembly	754-000062	16
Propeller Clamp	201-002780	8
M10*20 Stainless Steel Socket Hex Screws	126-000871	16
Threadlocker	131-000121

Step 1	1. For the C31/C40, each arm has two propulsion units: upper and lower. The upper propeller must match the motor rotation direction (CW or CCW), and the labeled side of the propeller must face upward during installation. For the lower propeller on the same arm, the labeled side must also face upward, and the propeller rotation must correspond to the motor direction as follows: If the lower motor rotates CW, the propeller must be CCW, and the propeller must be installed flipped 180° (inverted) so the labeled side faces upward. If the lower motor rotates CCW, the propeller must be CW, with the labeled side facing upward.This ensures the correct aerodynamic configuration for the coaxial propulsion system.
Use tools & fixtures
Operational special requirements	1. Pay attention to the installation direction

Step 2	1. Assemble according to the direction and position shown in the diagram. Ensure the propellers are installed in the correct direction corresponding to the motor rotation (CW or CCW). The spacer assembly for the lower propulsion unit should be installed symmetrically relative to the upper one.
Use tools & fixtures
Operational special requirements	1. The gasket installation sequence is correct. 2. No gaskets are missing. 3. The blade direction is consistent with the motor direction. 4. The installation direction and position are correct.

Step 3	1. Apply threadlocker to one-third of the length of the M10×20 hex socket screw. Then apply one drop of threadlocker at two diagonal points around the threaded hole opening. Secure the upper propeller clamp, then use a force gauge to verify that the required specification is met: 0.4–0.5 kgf.
Use tools & fixtures	1. Electric screwdriver 2. Tension gauge
Operational special requirements	1. Ensure no screws are missing or left unsecured. 2. Confirm the pull force meets the required specification.

Step 4	1. Conduct a flight test within 2 hours. After the flight test is completed, use a force gauge to test again and confirm it meets the required specification.
Use tools & fixtures	1. Tension gauge
Operational special requirements	1. Confirm that the tension meets the requirements

General requirements

1. Operators must wear anti-static wrists and finger covers or gloves

2. The workbench should always be kept clean and tidy

3. If you find three similar abnormalities, please report to the production line administrator immediately

4. Label the defective parts and place them in the designated defective product placement box