Brazil World Cup, Olympics, Ferries on Order From China

By George Backwell at September 14, 2013 00:48
Filed Under: drive systems, Ferries

Brazil World Cup 2014 and Olympics 2016 visitors will be able to sail between venues on a fleet of seven big new 2000-seat fast ferry catamarans designed for the job by Holland’s CoCo Yachts and to be built for Rio de Janeiro State by the Afai Southern Shipyard in China. Henk van Herwijnen, General Manager of CoCo Yachts says that the ferrys between Rio de Janeiro and Niterói are expected to carry 100,000 passengers every day, increasing to 150,000 during the international sports events.

Rio de Janeiro Ferry: Rendering courtesy of CoCo Yachts

People-moving on this scale demands a well-proven propulsion system that for the sake of the passengers is relatively noise-free, provides precision manoeuvrability, and takes up as little space in the fitting as possible. Veth Propulsion (also of Holland) came closest to meeting these demands at the right price and landed a contract to deliver four counter-rotating  Z-drives, type VZ-700-CR (700 kW/1800 rpm) for each of the new ferries, adding up to a grand total of 28 propulsion units.

It’s fairly well-known that the Z-drive eliminates the need of a conventional rudder, replacing it with an underwater pod able to rotate through 360° which gives it the excellent manoeuvrability needed for a ferry. Apart from a standard yet flexibly-mounted Z-drive design,  Veth Propulsion’s unit has a counter-rotating system (CR) which combines high efficiency with small propeller diameters.  Within a CR unit both propellers rotate in opposite directions, so that the second propeller compensates for the turbulent flow of water caused by the first propeller, and in combination they significantly reduce noisy and inefficient propeller cavitation.

Veth-Z-Drive: Image courtesy of Veth Propulsion

The manufacturers say that the optimum number of revolutions is about 20% less than a single propeller or two rotating in the same direction. These Veth-Z-Drive propellers are mounted on opposite sides of the hydrodynamic streamlined underwater gearbox creating a more solid bearing and secure sealing system.

The contract value of the whole project is said to be about US$ 110-million, including design and construction. Six of the ferries will burn diesel oil, and the seventh is to  be equipped with dual-fuel engines capable of using MDO or LNG.

Main particulars

    •    Length o.a. : 78.40 m
    •    Beam o.a. : 14.8 m
    •    Draft:  1.8 m
    •    Capacity: 2000 passengers / 8 crew
    •    Propulsion: Veth Propulsion
    •    Power units: to be announced
    •    Speed: 18 knots

The first ferry is due to be delivered in November 2014 and the remaining vessels bi-monthly.
 

 

 

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