1. What is Boat Propeller Pitch?

Propeller pitch is the theoretical distance a propeller would move forward in one complete revolution, assuming no slip. It's a crucial measurement for determining a boat's performance characteristics.

2. How Does the Calculator Work?

The calculator uses the basic pitch formula:

Where:

• \( Distance \) — Distance traveled by the boat (meters)
• \( Revolution \) — Number of propeller rotations during that distance

Explanation: This gives the theoretical advance per revolution of the propeller in ideal conditions (no slip).

3. Importance of Propeller Pitch

Details: Proper propeller pitch affects boat speed, fuel efficiency, and engine performance. Too high pitch can overload the engine, while too low pitch can prevent reaching optimal RPM.

4. Using the Calculator

Tips: Measure distance traveled in meters and count complete propeller revolutions during that distance. For accurate results, measure over longer distances (10+ meters).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between theoretical and effective pitch?
A: Theoretical pitch assumes no slip, while effective pitch accounts for actual water movement and slippage.

Q2: How does pitch affect boat performance?
A: Higher pitch generally means higher top speed but slower acceleration. Lower pitch improves acceleration but reduces top speed.

Q3: What is propeller slip?
A: The difference between theoretical and actual distance traveled, expressed as a percentage.

Q4: How do I measure propeller revolutions accurately?
A: Use a tachometer or mark the propeller and count rotations over a measured distance.

Q5: Can I use this for all boat types?
A: This calculation works for all propeller-driven boats, but actual performance depends on many factors like hull design and load.