In a large slow-speed propulsion diesel...

Question 1 / 270705eccefa1bacbc34ba4d475a6

Question 1 of 270705eccefa1bacbc34ba4d475a6

In a large slow-speed propulsion diesel engine, the side thrust on the crosshead is the direct result of _____.

Question 1 of 27070

In a large slow-speed propulsion diesel engine, the side thrust on the crosshead is the direct result of _____.

🔍 Key Concepts

• Crosshead function in a large slow-speed diesel engine • How connecting rod angle (angularity) changes through the power stroke • Difference between gas pressure on the piston and side forces on guides/bearings

💭 Think About

• Visualize the straight line of force from cylinder pressure through the piston and piston rod—does this create side thrust by itself? • Ask yourself when and why the crosshead guides need to resist sideways movement—what is pushing the crosshead sideways? • Consider which component’s angle changes as the crank rotates and how that angle would push sideways on the crosshead

✅ Before You Answer

• Identify which choices involve a change in direction of force (not just magnitude of force) • Distinguish between force acting axially along the piston rod vs. force acting laterally on the crosshead guides • Verify which part actually contacts the crosshead pin and can apply a sideways component during the power stroke

Question 1 of 27070

In a large slow-speed propulsion diesel engine, the side thrust on the crosshead is the direct result of _____.

the piston rod acting against the crosshead during the power stroke

the angularity of the connecting rod against the crosshead during the power stroke

the velocity of the crankpin during the power stroke

cylinder pressure acting against the piston crown

Question 1 / 270705eccefa1bacbc34ba4d475a6

Question 1 of 270705eccefa1bacbc34ba4d475a6

In a large slow-speed propulsion diesel engine, the side thrust on the crosshead is the direct result of _____.

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Question 1 of 27070

In a large slow-speed propulsion diesel engine, the side thrust on the crosshead is the direct result of _____.