10*4.5 inch-1045/1045R propeller pair for quadcopter:

he notation "10*4.5 inch-1045/1045R CW CCW" refers to a pair of propellers commonly used in quadcopters and other multirotor aircraft. Let's break down what each part of the notation means:

1. Size:
   • "10*4.5 inch" indicates the dimensions of the propeller. In this case, the propeller has a diameter of 10 inches and a pitch of 4.5 inches. The diameter represents the length of the propeller from tip to tip, and the pitch is the distance the propeller would theoretically move forward in one revolution.
2. Pitch:
   • The pitch of 4.5 inches suggests how far the propeller would move forward in the air during one complete revolution. It's a measure of the propeller's theoretical efficiency in generating thrust.
3. Rotation Direction:
   • "1045/1045R" specifies the rotation direction of the propellers. "1045" generally means a standard (clockwise) rotation, and "1045R" stands for reverse (counter-clockwise) rotation. For a quadcopter, you would typically use a pair of clockwise (CW) and counter-clockwise (CCW) propellers to ensure balanced thrust.
4. CW and CCW Pair:
   • The term "pair" indicates that you are purchasing a set of two propellers—one clockwise (CW) and one counter-clockwise (CCW). The pairing of different rotations is common in multirotors to ensure proper torque balance.