HamiltonJet HT900s for World’s Biggest High Speed Crew Boat

MarineNews
Friday, February 28, 2014

Waterjet manufacturer HamiltonJet recently got great news when four HT900 waterjets were selected for Incat Crowther’s latest project – a first-of-type 70 meter Catamaran Fast Crew Boat for operations in the Caspian Sea oil industry in Azerbaijan. When completed, this vessel will be the world’s largest high speed crew boat operating in the global oil industry. It will also be the largest vessel HamiltonJet has been involved in to date, and will further showcase waterjet’s performance and maneuvering benefits over other forms of propulsion in this demanding marine sector. HT Series waterjets feature a mixed flow pump with a greater nozzle to inlet ratio than comparable size axial flow waterjets. This provides high efficiency over the entire vessel speed range.

DP & Waterjets – a natural connection
The DP2 class vessel will have four control stations, each utilizing HamiltonJet’s MECS control system integrating with a DNV DYNPOS-AUTR dynamic positioning system. This system provides improved safety during crew transfers in conditions up to sea state 4. In designing this new 70m vessel class, Incat Crowther drew on its previous experience with the SEACOR CrewZer class of fast catamaran crewboats, with the fourth of these recently launched in the US. These vessels also utilize HamiltonJet waterjet propulsion (quad HM811s) and the combination of catamaran hull form and waterjets has proven very successful. HamiltonJet waterjets work particularly well in DP capable vessels, where the powerful 360 degree thrust forces generated by the jet’s split duct reverse deflector at any boat speed effectively act as an azimuth thruster. The effect of the waterjet maneuvering thrust is further enhanced with the wide spacing of the jet units in a catamaran configuration – two jets per hull – which provides even better control of the vessel’s stern and can even assist with sideways movement of the bow.

Propulsion: Power, speed and Performance, too
With four 2880kW MTU engines each turning 900mm diameter waterjets expected top speed is 36 knots with an efficient service speed of 30 knots at full load and 90% MCR. This speed performance will make the vessel more cost effective than helicopter transfer of crew and cargo, while the semi-SWATH hull design of the vessel, along with active ride control, will reduce stress on passengers so they arrive at an oil platform fit to work.

Options & More Advantages
A new optimized compact astern deflector retains the performance of HM series type ducts but with reduced weight and width for installation in narrow hulls. The deflector is actuated by two fully inboard hydraulic cylinders. The HT waterjet models are fitted with the JT nozzle steering system, also actuated by two fully inboard hydraulic cylinders. Shafts for both steering and astern deflectors are protected from wear and marine growth through the use of sealed rubber bellows on external shaft surfaces. Installation of HT series waterjets has been simplified by the use of a compression seal type transom plate arrangement, which allows for an increased tolerance for transom axial alignment. The transition duct extends from the flat surface aft of the intake opening to an area forward of the front intake screen mount (HT900 & HT1000 only). For an aluminum hull, the transition duct casting is surrounded by a section of 5083 aluminum plate so the shipyard does not need to carry out plate-to-casting welds. As the HT series waterjets utilize a tapered outside diameter impeller, the mainshaft axial position is adjustable in order to set and maintain impeller tip clearance. Aluminum anodes are used throughout HT series waterjets, with tailpipe internal anodes able to be replaced without removing the tailpipe. Like other HamiltonJet waterjet models a jet mounted and driven hydraulic power unit (JHPU), driven via multiple vee-belts from the jet coupling, is used for normal hydraulic operations. An optional auxiliary AC hydraulic pump (one per jet) is also available for actuation of the steering and reverse without the gearbox engaged. Hydraulic and thrust bearing oil cooling is provided by oil coolers integrated on the waterjet.



(As published in the February 2014 edition of Marine News - www.marinelink.com)
 


Technology

Scorpene Submarine Data Leak: Setback to Indian Navy

India has began multiple investigations to determine the extent of damage caused by the reported massive leak of secret data detailing the combat and stealth capabilities

NOAA Engineers a Better Current Sensor for Mariners

Navigating into seaports is now safer and more efficient for mariners thanks to improved NOAA technology that ships rely on to give them information about currents.

SMM 2016: World Premieres from around the Globe

Some 50,000 trade visitors from the whole of the world are expected in Hamburg for the start of SMM in less than two weeks. And once again, it is fully booked – with a total of more than 2,

Marine Propulsion

C-Job Designs Flettner Freighter for Switijnk

The Dutch shipping company family Switijnk has contracted C-Job Naval Architects to develop a Rotor Sail-equipped design to meet their specific loading and sailing profile.

MN100: R.W. Fernstrum & Company

The Company: R.W. Fernstrum & Company set the standard in marine heat exchangers over 65 years ago, building a reputation focused on innovation. Today, its commitment is to continual improvement,

SMM 2016: World Premieres from around the Globe

Some 50,000 trade visitors from the whole of the world are expected in Hamburg for the start of SMM in less than two weeks. And once again, it is fully booked – with a total of more than 2,

Marine Power

MN100: R.W. Fernstrum & Company

The Company: R.W. Fernstrum & Company set the standard in marine heat exchangers over 65 years ago, building a reputation focused on innovation. Today, its commitment is to continual improvement,

US Navy Ships Conduct Astern Replenishment-at-sea

“While replenishments-at-sea are routine, astern refueling is unique and requires precise navigation and coordination,” said Lt. Cmdr. Jason Ileto, fleet replenishment scheduler for Commander,

Better Turbocharger Performance, Proven Tech

Engineer wisdom: Nothing is worse as the right idea at the wrong time. But with the new ECOCHARGE Two-Stage Turbocharging System MAN D&T has reached both goals.

News

NParks, Keppel in S$2.08 mln Partnership for Restoring Singapore Forest Wetlands

The National Parks Board (NParks) and Keppel Corporation today unveiled plans for a partnership to restore the freshwater forest wetland ecosystem historically

Zumaia Offshore Acqires MPP Workboat Aitana B

In April 2016 Zumaia Offshore, S.L., leading workboat owner and operator based in the Basque Country, took delivery of the Cummins-powered MPP workboat “Aitana

Skaugen Goes to Red Again

Norwegian Marine Transportation Service Company I.M. Skaugen SE reported interim losses but cautiously positive and expecting a gradual recovery of trading opportunities

Marine Equipment

Zumaia Offshore Acqires MPP Workboat Aitana B

In April 2016 Zumaia Offshore, S.L., leading workboat owner and operator based in the Basque Country, took delivery of the Cummins-powered MPP workboat “Aitana

Maersk Line's Innovative Smart Reefers

Have you heard about Maersk Line's smart reefers that can listen and talk? Cutting edge technology that reduces risk in customer supply chain, claims Maersk Line.

Danish Maritime Authority Supports Maritime Cultural Days

The Danish Maritime Authority's buoy tender ’POUL LØWENØRN’ will be alongside in Korsør in connection with the Maritime Cultural Days. The vessel will be open to visitors throughout Saturday,

Vessels

C-Job Designs Flettner Freighter for Switijnk

The Dutch shipping company family Switijnk has contracted C-Job Naval Architects to develop a Rotor Sail-equipped design to meet their specific loading and sailing profile.

Damen Trading Sale hits 500th Vessel

30 years and 500 vessels later, Damen Trading is just getting started. Damen Trading’s story begins in 1986, with Damen Shipyards Group responding to growing market demand for used vessels.

Matson Orders Two ConRo Ships from NASSCO

Matson Navigation Company, Inc., a subsidiary of container shipper Matson, Inc., has signed a contract with U.S. shipbuilder General Dynamics NASSCO to build two

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Navigation Pod Propulsion Salvage Ship Repair Ship Simulators Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1356 sec (7 req/sec)