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MAN L27/38 for Offshore Propulsion Dubai-based Grandweld Shipyards has been appointed to build two Anchor Han- dling Tug Supply Vessels for undisclosed offshore operators. The AHTS newbuild- ings, will each be powered by two 8- cylinder MAN L27/38 main engines delivering a total of 2 x 2,720 kW in a standard twin screw propulsion layout for the drive of two ducted CP propellers. The calculated bollard pull is 90 ton. The engines for the vessels will be shipped from Denmark 2012, weeks 18 and 22 re-spectively. The L27/38 medium-speed propulsion engine is a popular workhorse for heavy-duty applications like offshore supply and service vessels, anchor han- dlers, tugs and workboats. The L27/38 is characterized by good performance over the entire load range, optimized for high-torque layout, dynamic behavior ? good acceleration ability with invisible smoke from idling to full load, low fuel oil con- sumption and low NOx emissions. Hornblower Hybrid Sailsinto NY HarborHornblower Hybrid (pictured right), the first vessel powered by diesel, hydrogen, batteries, wind and solar energy, arrived in New York Harbor. After nearly two years of construction and the work of more than 300 individuals, the vessel will service New York City upon completion of United States Coast Guard sea trialsand certifications. The innovative vessel reduces emissions, uses minimal diesel,and features several recycled and re- claimed materials, LEED-certified carpet and energy-efficient LED lighting. Mark- ing its public debut, the Hybrid will par- ticipate in the Statue of Liberty?s 125th Anniversary Flotilla on Oct. 28 at 10:30 to 11:30 a.m. from Pier 40 to the Statue.It will exhibit in the parade of ships in honor of the Statue?s original dedication from France on Oct. 28, 1886. Next year, the Hybrid will run harbor cruises withclose-up views of Ellis Island and the Statue of Liberty. ?As a concessionaire to the National Park Service, we constantly strive to help conserve and protect the parks we serve,? said Terry MacRae, CEO of Hornblower Cruises & Events. November 2011www.marinelink.com 83Double Control for Waterjets MJP Waterjets has combined steering and reversing of two jets simul- taneously into a central column operating both jets in parallel by meansof a single hydraulic control. This new design of the steering and re- versing unit called CSUI has recently been tested on the French landing craft CNIM EDA-R. The landing craft with its hourglass shaped hull and has two very different operating conditions: Catamaran Mode and Barge Mode and thus called for specific design requirements. The ves- sel is equipped with four engines and four jets, which are driven by a MJP 650 mixed flow pump. As usual, the intake is adapted and designed to the constraints given by the hull and its application using CFD. The swath type hull with its pronounced hourglass shape results in a narrow waist at the waterline. The section below the waterline is made to an ab- solute minimum. During the design phase MJP have made use of CFD also to optimize the flow in the bucket to enhance the reversing per- formance. This is particularly important on a landing craft in order to ensure safe disembarkation from the beach. Sea trials have shown that the vessel is able to operate at the incredible speed of 10 knots in reverse at full load in open seas. In Catamaran Mode, the center platform is highabove the waterline and the jets are consequently very deep in the water. When the center platform is lowered into Barge Mode, the jets are in a more common position. The design needs to fulfill the requirements for both operating conditions.www.mjp.se MR Nov.11 # 11 (80-88):MR Template 11/4/2011 11:14 AM Page 83
