On a vessel with a single propeller,...

Question 1 of 2707066636ee728f7522a1c518f9f

On a vessel with a single propeller, transverse force has the most effect on the vessel when the engine is put __________.

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Question 1 of 27070

Q

On a vessel with a single propeller, transverse force has the most effect on the vessel when the engine is put __________.

🔍 Key Concepts

• Transverse thrust (propeller walk) on a single-screw vessel • Effect of ahead vs. astern power on sideways movement of the stern • Difference between rudder effectiveness and propeller side force

💭 Think About

• When does the propeller wash flow strongest across the hull and cause the stern to "walk" sideways the most? • Does transverse thrust become more noticeable when you have strong ahead movement, or when you have little forward motion but high propeller RPM? • In which condition is the rudder least effective, making the sideways push from the propeller the dominant effect?

✅ Before You Answer

• Identify when water flow over the rudder is low, so the rudder can’t easily counteract prop walk • Consider which engine command gives high propeller thrust but minimal ahead speed • Think about typical harbor maneuvering: when do operators most notice the stern kicking sideways on a single-screw boat?