The speed necessary to reach port at a...

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Question 1 of 2066636eea28f7522a1c51b5ac

The speed necessary to reach port at a designated time is 18.7 knots. The propeller pitch is 24'03", and you estimate 3% positive slip. How many revolutions per minute will the shaft have to turn?

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Question 1 of 20

66636eea28f7522a1c51b5ac

The speed necessary to reach port at a designated time is 18.7 knots. The propeller pitch is 24'03", and you estimate 3% positive slip. How many revolutions per minute will the shaft have to turn?

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🔍 Key Concepts

• Propeller pitch as theoretical distance advanced per revolution • Relationship between speed in knots and feet per minute • Effect of positive slip on required RPM

💭 Think About

• Convert the vessel’s speed from knots into feet per minute so it matches the pitch units in feet and inches. • Figure out how many feet per revolution the propeller will actually advance when there is 3% positive slip, compared to the theoretical pitch. • Use the relationship: Speed (ft/min) = Advance per rev (ft/rev) × RPM to solve for RPM, then compare to the answer choices.

✅ Before You Answer

• Be sure to convert 24 feet 3 inches into decimal feet before using it in calculations. • Remember that positive slip means the vessel moves farther than the theoretical pitch, so adjust the effective advance per revolution correctly. • Double-check your unit conversions (knots to ft/min and inches to feet) before deciding which RPM choice matches your result.

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Question 1 of 2066636eea28f7522a1c51b5ac

The speed necessary to reach port at a designated time is 18.7 knots. The propeller pitch is 24'03", and you estimate 3% positive slip. How many revolutions per minute will the shaft have to turn?

Back

Question 1 of 20

66636eea28f7522a1c51b5ac

The speed necessary to reach port at a designated time is 18.7 knots. The propeller pitch is 24'03", and you estimate 3% positive slip. How many revolutions per minute will the shaft have to turn?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Propeller pitch as theoretical distance advanced per revolution • Relationship between speed in knots and feet per minute • Effect of positive slip on required RPM

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed