Step 1: Identifiying [A] and [C] propellers

Each set of propellers contains two A propellers and two C propellers.  Because the motors spin in different directions, the propellers must be designed differently to provide lift.  If you lay the propellers on the table, the right blade of an A propeller will twist toward you, and the left blade will twist away. The right blade of a C propeller will twist away from you, and the left blade will twist toward you. Once you have identified each of the propellers lay them next to the correct motors.   It is also possible that your A motors will have a silver center, or that they will be labeled underneath with an A.

Propellers “snap” onto the corresponding motor.

When “snapping” propellers into place, make sure to press the center point in a gentle but firm manner.

Step 2: Propeller [A] Installation

Attach [A] propellers to the corresponding [A] motors.

Step 3: Propeller [C] Installation

Attach [C] propellers to the corresponding [C] motors.

Step 4: Propeller Orientation Test

To check if the propellers are properly installed, hold the drone from the side with the leds of the drone facing to your right. Align the propellers, so that the propellers are parallel to each other but perpendicular to the airframe and top body panel. With the propellers aligned, look at the inside blades (the blade closest to the drone body). The inside blades should be sloped upward towards the drone body. If you imagine the blade slopes extending, the slopes of the blades should form a mountain or triangle.

Note: Misoriented propellers will cause the drone to behave erratically.

Step 5: Prop Guard Installation

Each prop guard has a clip located at the end with [2] holes. Attach one prop guard to each arm of the airframe making sure the holes snap into the airframe's corresponding connections.