Shafts and Propellers

Class society DNV GL has revised class rules for single shaft bearing installations and introduced two shaft alignment notations in the wake of a reported upsurge in stern tube bearing failures.

Mitsubishi Heavy Industries and Wärtsilä are to jointly market a new energy solution that deploys both waste heat recovery (WHRS) and power take-off/in (PTO/PTI).

Thordon Bearings has received another order from a Chinese shipyard which it says indicates more of the country’s shipbuilders are specifying water lubricated propeller shafting arrangements as standard.

Damen Shipyard Group has displayed the world’s first class-approved 3D printed propeller at its headquarters after a collaborative project between RAMLAB, Promarin, Autodesk, Bureau Veritas and Damen.

Technology group Wärtsilä has launched a pre-swirl stator, EnergoFlow, that it claims can offer fuel reductions of up to ten percent, with a payback time of less than two years.

A ferry operator hopes to keep its competitive edge by powering a new high-speed catamaran with waterjets.

New propulsion system enables independent engine and propeller control

Kobe Steel will be able to build smaller, stronger crankshafts after receiving certification from ClassNK to use greater design margins in the manufacture of crank components.

Van der Velden Marine Systems is this year set to deliver 100m2 full spade ATLANTIC rudders for five of the largest containerships ever ordered by China Cosco Shipping Corporation.