What is the main characteristic of a fixed pitch propeller?

• A. Blades are adjustable
• B. It can only rotate in one direction
• C. It has varying thrust based on water speed
• D. Shaft rotates in both directions

Answer: (B)

The main characteristic of a fixed pitch propeller is that it has blades set at a specific angle, which does not change during operation. This characteristic means that the propeller maintains its blade pitch, resulting in a consistent performance. While a fixed pitch propeller can only rotate in one direction, it does not offer the ability to vary thrust based on operating conditions or water speed, nor can the shaft rotate both ways. This design simplifies the construction and reduces maintenance needs compared to adjustable pitch propellers, which can change blade angles to adapt to varying operating conditions. Fixed pitch propellers are commonly found in smaller vessels where operational simplicity is favored over the advantages of variable thrust capabilities.