News | EQUIPMENT
Waterjets New Kamewa waterjet
targets workboats Rolls-Royce is targeting the workboat sector with its new A5 Series line of Kamewa waterjets. Officially unveiled at the Workboat event in New Orleans, US in November 2018, the A5 has been developed as a compact option for boats of approximately 10-25m in length, albeit with superior thrust to what might be typically expected from a smaller unit. Fredrik Appel, Rolls-Royce general manager,
product – waterjets, says: “We have listened to our customers asking for a smaller inboard footprint and adapted the design to meet this by reducing the space by 20%. However, we have also maintained an inlet waterway to accommodate the propulsion improvements.” Effectively,
the A5 Series will
gradually replace Rolls-Royce’s FF-branded jets. Shival Sapre, the group’s general manager for sales in the Americas, adds: “Te A5 Series offers the best price per performance for vessels operating at speeds between 25-40knots…[including] workboats, motor yachts, smaller passenger vessels, patrol boats and other high-speed, shallow-draught vessels.” Te A5 Series is manufactured from high-grade
marine aluminium and, although comprising a “completely new product”, has been “developed on the same design principles as our steel series,” Appel explains. Te new series comes in seven sizes, with power outputs spanning 100kW to 1,230kW, to cover a broad range of applications. Te launch has been preceded by intensive CFD
analysis and model scale testing, which was carried out at Rolls-Royce’s Kristinehamn hydrodynamic research facility in Sweden, plus a round of sea trials aboard the group’s own demonstration craſt in Finland. Consequently, in comparison to the FF-Series, the A5 is claimed to offer potential improvements of: 13% in bollard pull; 8% in steering and reversing efficiency; and 3% in pump efficiency.
www.rolls-royce.com
ROVs and AUVs
Reaed Bluefin ready to roll
General Dynamics Mission Systems has unveiled the redesigned version of its Bluefin-9 unmanned underwater vehicle (UUV), aimed primarily at commercial, academic and military end users. Measuring 2.42m (l) × 238mm (w) × 264mm
(h), fashioned from carbon fibre and featuring a dry weight of 70kg, the Bluefin-9 is reportedly designed for ease of deployment: it can be launched directly from shore or from small support craſt (RIBs, for example) by two persons. Te UUV is powered by a 1.9kWh rechargeable
Li-ion battery and has an operational endurance of up to eight hours when moving at 3knots. It is capable of reaching a top speed of 6knots in transit or 5knots when engaged in survey work, and can work in water depths descending to 200m. Te Bluefin-9 also comes equipped with a removable data storage module (RDSM), rated 1TB, which serves as a ‘data processor’ and houses an HD monochrome camera that can capture still images and video.
www.gdmissionsystems.com
Engines Coact engine oering
Rolls-Royce’s new A5 Series is claimed to offer a 13% improvement in
bollard pull compared to its FF-Series Ship & Boat International January/February 2019
ro rtsil Wärtsilä has unveiled a new, compact engine type, the Wärtsilä 14, which is intended to function as a main propulsion unit and/or an auxiliary genset for vessel types including tugs, OSVs and fishing vessels. Developed in collaboration with marine and offshore
machinery manufacturer Liebherr, the Wärtsilä 14 will 9
The luefin- UU can be launched directly from a RIB (credit: General Dynamics Mission Systems)
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30