When a slow-speed diesel engine is used to...

When a slow-speed diesel engine is used to...

Question 1 / 27070

Question 1 of 2707066636eef28f7522a1c52029e

When a slow-speed diesel engine is used to directly drive a fixed-pitch propeller, how is a stop order met?

Question 1 of 27070

Q

When a slow-speed diesel engine is used to directly drive a fixed-pitch propeller, how is a stop order met?

🔍 Key Concepts

• Fixed-pitch propeller behavior when directly coupled to a diesel engine • What control you actually have over engine speed and direction in a direct-drive system • Difference between changing propeller pitch and changing shaft rotation

💭 Think About

• In a direct-drive, fixed-pitch setup, what happens to the propeller whenever the engine crankshaft is turning? • If there is no mechanism to change the blade angle (pitch), what are your options to reduce thrust all the way down to zero? • Which choices describe actions that are only possible when you have controllable-pitch propellers or clutches, and which describe something you must do with a directly coupled, fixed-pitch arrangement?

✅ Before You Answer

• Verify whether a fixed-pitch propeller can have its pitch changed from the bridge or engine room. • Check if a direct-drive slow-speed diesel normally uses ahead/astern clutches at all, or if reversal is done another way. • Decide which option actually results in no rotation of the propeller shaft in this specific arrangement.