ADVANCED WATERJET DRIVE

TURBODRIVE 490 H.C.T.

Since 1962
Forerunners, always
Innovation and technological evolution without compromises.
This is the guideline that Castoldi engineers pursued in the development of the
Turbodrive 490 H.C.T. waterjet, designing each component with the most advanced
CAD and CFD softwares.
The result is a waterjet with high propulsive efficiency, capable of an outstanding static
and dynamic thrust which, thanks to its integrated heavy duty gearbox with many gear
ratios available (typical feature of all Castoldi waterjets), can be finely matched to any
engine on the market.

The excellence of the materials used (as the Duplex micro-cast stainless steel impeller
and the titanium liner) and the production processes (anti-corrosion hard anodizing
treatment protecting all the aluminium alloy components and three layers of special paint)
make it unique for the construction quality.

Extra accessories include the superior Clear-Duct unclogging system (performing the
simultaneous operations of impeller reversing and intake grid opening), interceptor
built-in integration as well as various available control systems, among which the high-end
electronic ACES with additional features such as: position keeping, smart anchor,
unmanned interface, autopilot integration and hybrid power.

#Thrust #Compactness #Lightness #Durability

TURBODRIVE 490 H.C.T. Main parts

Inboard mounted hydraulic actuators Inboard inspection hatches Oil pump directly splined
to the input shaft
Replaceable Titanium wear ring
Integrated heavy duty gearbox
with N. 20 gear ratios available

The Castoldi impeller is a true axial inducer type design and is recognized
as having the best efficiency, cavitation resistance and lowest weight
compared to any other type of pump.
Clear-Duct unclogging system (optional).
Performs the synchronized operations of impeller
rotation reversing and intake grid opening

Oil transducer

New high efficiency reversing bucket

Built-in multi-disc hydraulic clutch
and steering nozzle design

Impeller shaft rotating into a protective sleeve, Movable protection grid on water intake with hydrodynamically profiled set of bars
Integrated interceptors Water pickup for engine cooling oil immersed and not in contact with the water (hydraulically controlled)
TURBODRIVE 490 H.C.T.

• The highest thrust and best performance

Assured by the new component design.

• The most effective defense against marine corrosion

Assured by the hard anodizing treatment protecting all the aluminium alloy
components with 60 microns thickness of aluminum oxide (ceramic), three layers
of special paint and cathodic protection by sacrificial anodes.

• The most efficient anti-clogging system

Assured by the Clear-Duct system (optional for H.C.T.) performing the simultaneous
electrically controlled operations of impeller rotation reversing and the intake grid
opening.

• The highest suitability to operate in sandy, dirty and shallow waters

Thanks to the impeller shaft rotating into a protective sleeve, oil immersed and not
in contact with the water.

• The longest operational life

Thanks to the presence of all oil lubricated bearings.

• The most compact installation

Thanks to the presence of the built-in gearbox and hydraulic multi-disc clutch.
 1080
Dimensions
1080
934

892
851
934

892

858
851

1134
1525 1162

1080 1525 1162

1080
936

892

858
851

583
936

858
1080 1525 1162

1080
TURBODRIVE 490 H.C.T.

Impeller: Duplex stainless steel Reversing shaft: AISI 316 stainless steel
Impeller housing: G Al Si 9 aluminum alloy Waterjet body: G Al Si 9 aluminum alloy
Impeller housing wear ring: Titanium Gear wheels: Surface carbo hardened high grade 18 Ni Cr Mo 5 steel
Impeller shaft: Aquamet 17 stainless steel
The whole unit is protected by a hard anodizing treatment, plating all
Input shaft: 39 Ni Cr Mo 3 high grade steel light-alloy components with 60 microns thickness of aluminum oxide
Stator: G Al Si 7 aluminum alloy (ceramic), three layers of special paint and cathodic protection
by zinc anodes
Steering nozzle and reversing bucket: G Al Si 7 aluminum alloy
Steering shaft: Nitronic 50
 Technical specifications

MAXIMUM SUGGESTED DISPLACEMENT (t) MAX POWER INPUT (kW)

.
TURBODRIVE 490 H.C.T. Technical specifications

Impeller: N.4 blades, single stage, axial flow

Impeller diameter: 490 mm at the inlet
Stator: N. 5 blades
Integrated heavy duty gearbox: With N.20 gear wheels ratio available
Input flange: Suit up to 250 mm diameter drive shaft flange
Impeller disconnecting/connecting system: Built-in multi-disc hydraulic clutch
Transom angle: 90°
Drive shaft rotation: Clockwise looking at the input driveshaft flange
Inspection hatch: N. 2, inboard
Hydraulic actuators: All inboard, waterjet mounted
Water pick-up for engine cooling: Suit 2’’ 1/2 GAS
Hydraulic power unit and accessories: Incorporated hydraulic pump directly splined to the input shaft for the waterjet power controls. Solenoid valves and piping
complete the hydraulic plant (all inboard, waterjet mounted)
Unit dry weight (including gearbox, hydraulic clutch, water intake, grid, duct, anodes etc.): 941 kg
Hydraulic weight (oil pump, actuators, solenoid valves, brackets): 54 kg
Entrained water volume: 256 l
Oil volume: 35 kg “SAE 30” Uni-Grade oil type (gearbox and hydraulics)
B.P.R.: Additional water intake for take-off improvement
Water intake protection: Movable debris screen grid with double set of hydrodiynamically profiled bars
Bearings: All oil lubricated

Clear-Duct unclogging system (optional): Superior unclogging system by simultaneous operations of impeller reversing and intake grid opening, 45 kg

Reversing system: Castoldi compact “Twin-Duct”reversing bucket. (75% of the forward static thrust)
Steering system: Castoldi steering nozzle integrated in a protective bowl
 Since 1962
Forerunners, always

Castoldi S.r.L.
Strada Provinciale 114 n. 10 · 20080 Albairate (Milan) · ITALY
Tel : +39 02 9401881 · Fax : +39 02 94018850 · info@castoldijet.it
www.castoldijet.it

castoldijet