Brochure - STEALTH technology

STEALTH
520 patrol
Hysucat ®
The HYdrofoil SUpported CATamaran (HYSUCAT) is an integrated design comprising a catamaran hull equipped with a hydrofoil system
between the demi-hulls which carries a part of the craft’s weight at speed.
This development reflects 30 years of Professor Karl-Gunter Hoppe’s research before and while employed by the University of Stellenbosch,
as Senior Lecturer in Fluid Mechanics and Marine Engineering.
The efficient load carrying capability of the hydrofoil system combined with the inherent stability and pleasant seakeeping properties of the
planing catamaran result in a most economical high speed surface craft with excellent seakeeping behaviors. The specific hull design is an
asymmetrical catamaran hull with a centre-pod rounded tunnel, with the foils fitted forward and aft.
powerful, functional . . .
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Performance Technology
surface propulsion
STEALTH integrated surface propulsion
6-blade surface piercing propeller
Low maintenance
Smooth and quiet
engineering excellence
Man R6-800 common rail engines
BOSCH in-line injection pump
Electrical engine speed governor
Globally recognized for efficiency, and an early
flattening torque curve while being the quietest
reliability factors
Superb marine engineering
Service access to systems
Fuel and oil management systems
hydrofoil system
Central main and aft stabilizing HYSUCAT
foil system
instinctive innovation
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Performance Technology cont.
integrated surface drive (ISD)
The STEALTH technology Integrated Surface Drive (ISD) unit is built
as part of the vessel’s hull. This optimally positions the surface piercing propeller in the water flow from the transom with minimal external
moving components – no hydraulic cylinders, steering rods or thrust
bearing with their vulnerable soft covers exposed to grounding and
collision damage and vulnerable to corrosion and marine growth.
The ISD is considerably simpler and more robust than most conventional drive systems, competitor surface drives, stern drives, water
jets and pod drive units.
advantages of ISD
ŸŸ It makes use of high-efficiency surface propellers which are
typically have higher efficiency than other propeller types.
Further, the drive-shafts exit the transom of the vessel at and
extremely shallow angle which gives a higher useful forward
thrust component than normal propeller-shaft systems.
ŸŸ Shallow draft characteristics due to propeller-shaft exit
through the vessel’s transom and integrated rudder mounted
athwarthships of the surface propeller.
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ŸŸ Extremely low maintenance costs as the surface propeller
and rudder are the only eternally fitted components of the
drive system – all other components are internally fitted within
the hull. They are not subjected to impact and corrosion damage and can be easily accessed with the vessel in the water
for maintenance.
ŸŸ As the hull transom is positioned forward of the vessel stern
and recessed into the aft hull area, the ISD does not protrude
past the stern of the vessel. This protects the ISD from stern
damage and safely positions the propeller away from any
user activities at the stern of the vessel.
ŸŸ Excellent astern performance from the surface propeller due
to the angled-shape of the drive housing deflection propeller
wash under the vessel’s hull when reversing.
ŸŸ An integrated exhaust exit for propeller ventilation at slow
speeds which aerates the surface propeller and promotes
rapid acceleration to planning speeds. The concealed and integrated nature of the exhaust outlet promotes rapid attenua-
ŸŸ No propeller height adjustment is necessary due to the opti-
tion of exhaust noise which enables vessel pass-by noise lev-
mal design integration of the ISD for each particular hull size.
els to be below international limits for vessel noise emissions.
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Performance Autonomy
vessel speed
Versatile speed range with a loiter speed of 7-10
knots, operational speed of 30-38 knots and a
maximum speed of 45 knots. In general, the
HYSUCAT hull will allow the STEALTH 520 patrol
to maintain a speed of 30% faster than any equivalent sized monohull vessel in any given sea-state.
vessel range
High efficiency HYSUCAT hulls mean better fuel
consumption for a specified vessel speed. The effect of this is a high vessel range. The STEALTH
520 patrol is fitted with 3,000 liter fuel tanks which
gives the vessel and operation range of 500 nautical miles at 37 knots.
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Features
ride quality and seaworthiness
The ride-comfort of a catamaran hull is significantly improved by the high slenderness ratio of the
individual catamaran hulls. The narrow hulls allow the vessel to punch through waves resulting in
lower vertical accelerations which are perceived
as a softer and more comfortable ride for the crew.
The ride quality is further improved in rough seas
due to the motion damping effect of the hydrofoils.
The overall result is a vessel with low impact loads
which is ideal for reducing crew fatigue and stable
when used as a weapons platform.
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damage stability
Each hull of the vessel is divided into six independent watertight compartments with three in each
hull. If one compartment is damage and flooded,
the vessel will be capable of returning to harbour
under its own power. The vessel will not sink if any
three compartments are damaged or flooded providing a safe platform for the crew until rescue.
ballistic protection
The lightweight, composite construction of the hull,
deck and superstructure of the STEALTH 520 patrol incorporates manufacturing techniques using
core materials and Kevlar fabrics. Windows are
bullet-resistant glass. These construction methods provide vessel and crew protection against
most small-armour fire such as the widely used
AK47.
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Purpose
The STEALTH 520 patrol is purposely designed
and developed to provide a craft that has a long
range, speed and comfort and can be deployed
for intercepter and boarding purposes.
Safety of the crew is assured by deploying
ballistic proof construction methods and
materials while the interior space and
visibility can enable crew to engage in
offensive activities with the correct
ensemble of weapon systems.
Various layout options are available including
cabins, galley and heads.
Deck areas are strengthened to accommodate
a variety of light weight weapon systems while
ample cargo area is available for
ammunition storage.
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Specifications and Layout
Overall Length:
52 ft
15.5 m
Beam:
18 ft
5.5 m
Cruising Speed:
35 knots
Maximum Speed:
45 knots
Draft (maximum load):
3”9”
1.2m
Fuel Capacity:
790 US gal
3 000 l
Water Capacity:
114 US gal
430 l
Weight (dry):
39 700 lbs
18 000 kg
Range:
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500 nm at cruising speed
layout, accommodation and storage
ŸŸ The foredeck has a secure, reinforced weapons platform accessible from the interior of the vessel via a watertight door.
ŸŸ The aft cockpit has a reinforced deck suitable for fitting a weapons pedestal.
ŸŸ The internal ammunition-locker is centrally located within the ballistically protected hull with separate small-quantity ammunition
lockers located at each weapons pedestal.
ŸŸ Accommodation is provided for five crew. There are workstations
for helmsman with two supporting navigation and tactical stations
and with additional seating for two crew. All seating uses shockmitigating, jockey style seats. Over-night berths are provided for
four crew in one cabin with a private berth in a separate captain’s
cabin. There are galley and toilet and shower facilities. All accommodation spaces are air-conditioned.
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This document is not contractual. All descriptions and illustrations are only indicative.
We reserve to modify or improve our product without notice. September 2013