Class 2 (2nd Engineer) MEKG 📅 Oct 2025

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. (6)

(b) State how the vanes described in (a) are secured and the method of sealing the edges. (5)

Reference Answer

### (a) Vane Type Steering Gear: Description, Weight Support & Wear Down
A rotary vane steering gear is a compact, high-torque hydraulic actuator directly mounted on the rudder stock, commonly used for rudder angles up to 2 x 70°. It consists of a fixed housing (stator) and a rotating component (rotor).
**1. Construction and Operation:**
* **Stator:** A cylindrical housing, securely bolted to the ship's deck structure and steering flat. It contains a number of fixed vanes (typically three) projecting radially inwards.

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