Exam Question

(a) Large marine diesel engine flywheels are typically made of cast steel for strength and durability. They are located at the aft end of the crankshaft, secured by bolts passing through the flywheel and a flange on the crankshaft. The flywheel may be a single, cast piece or constructed from multiple arms joined together. The flywheel has a ring with gears, and the gear teeth engage with the engine's turning gear for starting and maintenance purposes. These teeth can be directly machined into the flywheel or fitted as a separate component (e.g., shrink-fitted).
One-Piece Cast Flywheel
The shape depicts a large, thick disc-like component. The outer diameter should be significantly larger than the inner diameter, which fits onto the crankshaft. The thickness should be substantial to indicate its mass.
The inner diameter has several large, evenly spaced bolt holes. The bolts secure the flywheel to a flange on the crankshaft's rear-end flange.