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HTSerieS1500kW to 5500kW

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HT Series waterjets eature a mixed ow pump witha greater nozzle to inlet ratio than comparible sizeaxial ow waterjets. This provides high efciencyover the entire vessel speed range.

A new optimised compact astern deector retainsthe performance of HM series type ducts but withreduced weight and width for installation in narrowhulls. The deector is actuated by two ully inboardhydraulic cylinders.

The HT waterjet models are ftted with the classleading JT nozzle steering system, also actuated by

two fully inboard hydraulic cylinders. Shafts forboth steering and astern deectors are protectedfrom wear and marine growth through the use ofsealed rubber bellows on external shaft surfaces.

Installation of HT series waterjets has beensimplifed by the use o a compression seal typetransom plate arrangement, which allows for anincreased tolerance for transom axial alignment.

The transition duct extends rom the at suraceaft of the intake opening to an area forward of thefront intake screen mount (HT900 & HT1000 only).For an aluminium hull, the transition duct casting

is surrounded by a section of 5083 aluminium plateso the shipyard does not need to carry out plate-to-casting welds.

The use of a relatively short transition on the twolarger HT models makes these waterjets easierto adapt to warped hull shapes common in largermonohull vessels, and to avoid interference withhull wedges and other appendages.

The intake screen on HT series waterjets featuressix hydrodynamically profled bars, which oerhigh efciency while maintaining protection o thepumping gear.

As the HT series waterjets utilise a tapered outsidediameter impeller, the mainshaft axial position isadjustable in order to set and maintain impeller tipclearance.

Aluminium anodes are used throughout HT serieswaterjets, with tailpipe internal anodes able to bereplaced without removing the tailpipe.

Like other HamiltonJet waterjet models a jetmounted and driven hydraulic power unit (JHPU),driven via multiple vee-belts from the jet coupling,is used for normal hydraulic operations. An optionalauxiliary AC hydraulic pump (one per jet) is alsoavailable for actuation of the steering and reversewithout the gearbox engaged. Hydraulic andthrust bearing oil cooling is provided by oil coolersintegrated on the waterjet.

Thrust bearing oil circulation is provided by atandem pump mechanically driven by the hydraulicpump.

HamiltonJet HT Series.

Right: A HamiltonJet HT1000 waterjet in the fnal stages o assembly in the New Zealand actory

General InformationHamiltonJet HT Series

waterjets represent thenext evolution in water jet

propulsion technology.

Developed from the highly successfulHamiltonJet HM waterjet range,HT Series waterjets incorporate

improved efciency and cavitation

performance to enhance the existingbenefts o HamiltonJets superior

propulsion systems.

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DvshaftCouplng Flang

Tanston duct, ncludng ntak scns suppld ady to mount n hull.

inboad thustbang assmbly

Thust Bang and Wat Sal Assmbly

Thrust loads from the waterjet impeller are taken by theinboard thrust bearing attached to the intake

Radial loads rom the driveline are also taken by this bearing typically no additional internal support bearings are necessary

Bearing housing is separate rom water seal cavity eliminates water contamination in case of a faulty seal

Thrust bearing oil is circulated through an oil cooler and flterby an integrated circulation pump

Waterseal located at orward end o mainshat in area o low

uid pressure Water seal can be replaced rom inside the vessel

Tanston Duct

Factory supplied to suit hull material

Area orward and at o the Transition Duct to be suppliedby the boat builder to details provided by HamiltonJet

Transmits waterjet thrust to hull bottom rather than transom

Designed for optimum performance over a wide speed range

Includes an integrated removable intake protection screen

Waterjet intake ush with hull bottom

Low Mantnanc

Absence o exposed propulsion gear reduces risk o impactdamage

Impeller is fnely matched to engine power to eliminate engineoverload under any conditions

Inboard hydraulic system, actuators and thrust bearing orminimum maintenance

A water lubricated rear shat bearing is utilised or highreliability and low maintenance cost

Contols

Utilises HamiltonJets proven MECS electronic control system

Electronic interace module and wiring loom integrated with thewaterjet

HamiltonJet Features

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Adhad/Astndefector

JT stng nozzl

inboad stng andahad/astn hydaulcs

Hydaulc Systm

Inboard hydraulic sub-assemblies

Independent hydraulic system on each waterjet orredundancy

No hydraulic system plumbing required by the shipyard

Complt intgatd Dsgn

Each Hamilton Waterjet is a complete packaged, actorytested, propulsion module

Reverse and Steering control systems are ully integratedwith the jet to simplify installation and maintenance

Ahead/Astern Defector

Split-duct astern deector provides powerul, highefciency astern thrust under all conditions o boat speed,water depth and throttle setting

Mounted on waterjet tailpipe ully independent osteering deector

Directs ow under the hull and away rom the waterjetintake, preventing recycling o water ow under the vessel

New narrow design decreases installation space require-ments while maintaining high reverse thrust efciency

JT Stng Nozzl

JT steering nozzle provides responsive and efcient steeringcontrol at all boat speeds

No central deadband signifcantly improves steeringresponsiveness during small course corrections and virtuallyno loss of boat speed

excllnt Manouvablty

Highly efcient and responsive thrust vectoring at all boatspeeds

Exceptional manoeuvring and docking perormance

Mxd Flow Pump Dsgn

Features a completely new advanced mixed ow pumpdesign that delivers both very high efciency ANDoutstanding cavitation performance

extnsv ntnal and xtnal cathodc potcton

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Note: all measurements shown are in mm

A long Transition Duct option is available for the HT900. Please consult your HamiltonJet Distributor for more information

HT810 Dimensions

HT900 Dimensions

HT1000 Dimensions

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HT Series Power / RPM Curves

8050

6700

5360

4020

2680

1340

0

6000

5000

4000

3000

2000

1000

0

Pow [kW] Pow [hp]

200

300

400

500

600

700

800

900

1000

1100

HT1000

HT900

HT810

Componnt Matal Standad

Transition Duct To match hull material

Impeller CF8M Stainless Steel ASTM A743

Wear Ring 2205 Stainless Steel ASTM A240

Mainshaft 2205 Stainless Steel ASTM A276Stator EN AC 44100 Marine Grade Aluminium BS EN 1706

Nozzle EN AC 44100 Marine Grade Aluminium BS EN 1706

Steering Deector EN AC 44100 Marine Grade Aluminium BS EN 1706

Astern Deector EN AC 44100 Marine Grade Aluminium BS EN 1706

Thrust Bearing Spherical roller type

Rear Bearing Water lubr icated Marine Bearing

Shaft Seal Face type mechanical seal

Anodes Aluminium MIL-A-24779(SH)

MATERIAL SPECIFICATIONSAbove and Below: Crewboat Aaron McCall was the frst vessel to be ftted with quadrupleHamiltonJet HT900 waterjets

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WORLD HEADQUARTERS

HamiltonJet Global

PO Box 709

Christchurch

New Zealand

Phone: +64 3 962 0530

Fax: +64 3 962 0534

Email: marketing@hamjet.co.nz

www.hamiltonjet.co.nz

REGIONAL OFFICES

HamiltonJet Americas

14680 NE North Woodinville Way

Suite 100

Wppdomvo;;e. WA 98072

United States of America

Phone: +1 425 527 3000

Toll Free: 800 423 3509

Fax: +1 425 527 9188

Email: marketing@hamiltonjet.com

www.hamiltonjet.com

HamiltonJet Europe

Unit 26, The Birches Industrial Estate

East Grinstead

West Sissex RH19 1XZ

United Kingdom

Phone: +44 1342 313 437

Fax: +44 1342 313 438

Email: marketing@hamjetuk.com

HamiltonJet Asia

50 Ubi Crescent,

#01-08 Ubi Techpark,

Singapore 408568

Phone: +65 6415 7227

Fax: +65 6415 7211

Email: hamiltonjetasia@hamjet.co.nz

Your local HamiltonJet Distributor is

Cover: Korean Coast Guard patrol vessel, South Korea. Twin HT1000 waterjets and twin HM811 boost jets.