Aquamaster Propulsion Units Installed In Self-Unloading Malaysian Bulker
The biggest application to date of the Aquamaster azimuth propulsion units manufactured by Hollming Ltd. Engineering Works in Rauma, Finland, is in a 5,000-dwt selfunloading cement carrier built by Sahab Shipyard in Malaysia for Perbadanan National Shipping Line of Kuala Lumpur.
The bulk carrier, designed by Shiptech Pte. Ltd. of Singapore, operates between Kuantam and Pulau Langkawi. As the traffic is mainly an interisland operation, the owner specified the need for high performance of the main propulsion system in the ports.
The Aquamaster twin-screw, hull-mounted type US 1401 propulsion units achieve full nominal thrust when the main engines are operating in reverse. In addition, a sideward thrust can be used when moving the vessel to quayside, eliminating the need for a bow thruster.
This decreases hull resistance and provides savings in fuel costs. The main engines are two Mirrlees Blackstone ESL 6 MK 2 diesels, each developing 1,310 bhp at 1,000 rpm. The two Aquamaster US 1401/ 3000 propulsion units have open propellers with a diameter of 2,100 mm and speed of 306 rpm. The units are classed by Det norske Veritas 1A 1R 280.
The main engines and propulsion units are controlled by an Aquapilot steering system. A main control panel is installed in the wheelhouse and a portable control can be used on the bridge wings. The rpm control of engines is electro-pneumatic through an E/P converter. The Aquapilot system is connected to an Anschuetz autopilot helm steering unit.
For further information and free literature on the Aquamaster propulsion units,