Page 42: of Marine News Magazine (September 2015)

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BOAT OF THE MONTH

The Carrousel-RAVE Design Ship-Handling Wizard

Edited by Joseph Keefe n 2010, Robert Allan Ltd. began exploring the merits and aft with approximately four diameters of separation, of a new concept in escort tug design, using two Voith and with the VSP pitch settings optimized, the result was cycloidal propellers placed linearly fore and aft in the almost no interference effects between the two drives. The

I tug, rather than the conventional “Voith Tractor” location resulting thrust vector diagram is an almost perfect circle as forward. Eventually, Robert Allan Ltd. and Voith agreed illustrated in Figure 1, providing a 33% increase in athwart- on a program of joint applied research to properly and ships thrust capability compared to a standard VSP tractor.

fully explore the hydrodynamic and technical challenges that this new Robert Allan Ltd. – Voith Escort (RAVE) Multraship’s Carrousel Towing System con