Class 2 (2nd Engineer) MEKG 📅 Sep 2023

Exam Question

(a) Describe with the aid of sketches where necessary a vane type steering gear showing how the weight of the rudder and stock are carried and the arrangement that allow for wear down. (10)

(b) State how the vanes described in (a) are secured and the method of sealing the edges. (3)

Reference Answer

### (a) Vane Type Steering Gear, Rudder Weight Support, and Wear-down Allowance
A rotary vane steering gear is a compact, high-torque hydraulic actuator used for rudder positioning. Its operation is based on applying hydraulic pressure to movable vanes, causing them to rotate within a fixed housing.
**1. Construction and Operation:**
* **Stator:** A cylindrical housing fixed securely to the ship's structure. The inner surface of the stator is machined to form a working chamber and incorporates a set of fixed vanes projecting radially inwards.

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