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Author Stealth Boat
AK
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Registered: 5th Jul 00
Location: Aberdeen City
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4th Jun 11 at 14:18   View User's Profile U2U Member Reply With Quote

Saw two of these badboys in Bergen on Norwegian Day last month... just got round to googling them.

60kts!!!!! Feckin hell thats quick. Fans on hull to lift off surface, 4 gas turbine engines, composite construction and stealth technology.

pretty cool things. I have pics on my BB but cant find the lead The are Skjold Class Patrol boats, one of them was called 'Storm' and the other 'Skjold'










quote:

Dimensions:
Overall Length 47.5m
Beam 13.5m
Height On Cushion 15m
Draught Off Cushion 2.3m
Draught On Cushion 0.9m
Full Load Displacement270t
Performance:
Maximum Speed
More than 110km/h (60kt)Speed
On Diesel 14.8km/h (8kt)
Propulsion:
Gas Turbine Engines 2 x 4,000kW and 2 x 2,000kW
Lift Fan Engines 2 x 735kW
Manoeuvring Engines2 x 370kWGenerator,
Three Phase440V, 228kWWaterjets2

The Storm has an air-cushioned catamaran hull and waterjet propulsion, which provides high speed and manoeuvrability.

The shallow draft on air cushion gives the advantage of access to shallow coastal waters
KNM Storm's faceted external shape and the use of radar absorbing materials embedded in the structure contribute to the vessel's stealth features.

KNM Storm have four gas turbine engines driving the waterjets.



http://www.naval-technology.com/projects/skjold/

The Skjold class of missile fast patrol boats is characterised by its speed, reduced signatures, small size with heavy weapon load and its littoral combat capability. The Skjold ('Shield') has an air-cushioned catamaran hull (surface effect) which, with waterjet propulsion, provides high speed and manoeuvrability.

"The Skjold missile fast patrol boat has an air-cushioned catamaran hull."The first-of-class ship, KNM Skjold (P960), was commissioned in April 1999. The Norwegian government approved the build of five more Skjold class vessels in June 2002. Contract negotiations were concluded in July 2003. The series of ships are being constructed at the Umoe Mandal shipyard and are planned for delivery from 2007-2009.

The other five hulls are: Storm (P961), Skudd (P962), Steil (P963, launched January 2008), Glimt (P964), Gnist (P965). Storm (P961) was launched in November 2006, began sea trials in January 2008 and is scheduled to commission in December 2008.

The Skjold Class programme is under review by the Norwegian government and a decision on its future is expected before the end of 2008.

In September 2002, the ship completed a 13-month deployment in the USA, allowing the US Navy to study the Skjold class concept. The ship participated in a series of naval exercises and a number of tests with US Navy research establishments NAVSEA and the Office of Naval Research. This was the result of a bilateral agreement in which the US Navy reviewed the Skjold capabilities and performance as part of their transformational activities including Littoral Combat Ship (LCS) development.

In September 2003, Skjold was temporarily de-commissioned and returned to the Mandal shipyard for the upgrading of its propulsion system. The vessel began sea trials in November 2006, prior to re-commissioning in mid-2008.

P-960 COVERT OPERATIONAL CAPABILITY
An important capability of the Skjold is its covert operational capability in littoral warfare, particularly in using Norway's coastal topography with its islands and fjords, to carry out surveillance and engage hostile forces from a close distance while remaining undetected.

The shallow draught of 0.9m to 2.3m allows the ship to access very shallow waters denied to other vessels.

AIR CUSHION CATAMARAN (ACC) DESIGN
The ship's configuration uses an Air Cushion Catamaran (ACC) design, which is an advanced variant of Surface Effect Ship (SES) technology.

The ACC is based on a catamaran hull with an air cushion between the hulls and has been successfully proven with the Norwegian Oksoy class minehunters and minesweepers which entered service in 1994. The low area of wetted surface of the hulls gives an improved level of shock resistance and significantly reduced wave resistance compared to that of a conventional displaced or semi-displaced hull configuration.

"Skjold class vessels have a low draught of 0.9m."VT Maritime Dynamics provides the vessel's stabilisation systems, including a ride control system that monitors and regulates the pressure of the air cushion by controlling vent valves and a stern fan system that controls the stern seal pressure.

The elevated position of the magnetic components reduces the magnetic signature. The combination of the twin hull and water jet propulsion provides very high and very responsive manoeuvrability. Vital systems have been duplicated for enhanced survivability and the ship remains operational with one engine room set lost.

The low draught of 0.9m on cushion gives an advantage of access to shallow coastal waters and lower vulnerability to impact against surface or tethered mines or other debris.

The hull is of composite construction. The hulls are laminated inside and outside with fibre-reinforced plastic composed of glass fibre and carbon laminates bound with vinyl ester and polyester resin. A scrimp manufacturing process is used in construction, involving vacuum-assisted resin injection.

Carbon fibre and carbon-loaded materials have been selected for the beams, mast and supporting structures, which need high tensile strength, for example the support structures for the gun and the electro-optical and radar weapon director.

RADAR-ABSORBENT DOORS, HATCHES AND WINDOWS
Radar-absorbent materials have been used in the load-bearing structures over large areas of the ship. This strategy leads to significant weight saving compared to conventional construction techniques of applying RAM cladding to the external surfaces.

The ship's profile has a faceted appearance with no right angle structures and few orientations of reflective panels. Doors and hatches are flush with the surfaces and the windows are flush without visible coaming (edge of window aperture) and are fitted with radar-reflective screens.

"An important capability of the Skjold is its covert operational capability in littoral warfare."SENIT 2000 COMBAT MANAGEMENT SYSTEM
The command and control system for the six Skjold Class vessels will be the lightweight Senit 2000 Combat Management System, jointly developed by DCNS and Kongsberg Defence and Aerospace.

The system has also been selected for the modernisation of the Royal Norwegian Navy's Hauk class fast patrol boats.

The Senit 2000 combat management system uses operating modes for littoral warfare and is interoperable with tactical datalinks 11 and 16, to be supplied by Aeromaritime. Senit 2000 gives fast response to pop-up air threats such as helicopters or other aircraft that suddenly emerge from cover.

SKJOLD WEAPONS
The ship is armed with eight Kongsberg NSM (Nye Sjoemaals Missiler or Norwegian Strike Missile) anti-ship missiles, which have been developed for the Skjold class ships and for the Fritjof Nansen Frigates. The NSM missile is equipped with GPS midcourse and a dual-band imaging infrared seeker guidance and has a range in excess of 150km. NSM entered serial production in June 2007.

The ship's short-range surface-to-air missile is the infrared-guided MBDA Mistral in a portable configuration. A twin launcher will be deployed on the deck or on a land site. The missile is armed with a 3kg warhead and has a target range of 4km.

The ship's gun, for deployment against aircraft and other vessels, is the Oto Melara 76mm Super Rapid. The gun has a burst-firing rate of 120rpm, firing 6kg shells to a range of 16km.

SENSORS

The Saab Systems Ceros 200 radar and optronic fire control system provides fire control for missiles and gun. Ceros 200 includes a Ku-band radar target tracker, CCTV camera, thermal imager, video tracker and laser rangefinder.

"The Skjold class gun, for deployment against aircraft and other vessels, is the Oto Melara 76mm Super Rapid."Thales Naval France has been awarded the contract for the MRR-3D-NG G-band multi-role radar and associated IFF systems. The MRR-3D-NG radar has a lightweight phased array antenna and operates as both a surveillance radar and a self-defence system sensor, with automatic mode switching.

In surface surveillance mode, the MRR-3D-NG can detect low- and medium-level targets at ranges of up to 140km and in long-range 3D air surveillance mode targets up to 180km; in the self-defence mode, it can detect and track any threat within a radius of 60km.

COUNTERMEASURES

The CS-3701 Tactical Radar Surveillance System (TRSS), from EDO Reconnaissance % Surveillance Systems of Morgan Hill, California, provides Electronic Support Measures (ESM) and Radar Warning Receiver (RWR) functions. The system's 360 circular array interferometer antennas are produced by EDO Antenna and Techonlogies of Deer Park, New York.

Skjold vessels will be equipped with the MASS (Multi-Ammuntion Softkill) decoy system from Rheinmetall Waffe Munition (formerly Buck Neue Technologien) of Germany. MASS can launch up to 32 omni-spectral projectiles in a time-staggered configuration against anti-ship missiles and guided projectiles. The MASS decoy covers radar, infrared, electro-optic, laser and ultraviolet wavebands.

GAS TURBINE PROPULSION ENGINES
The main propulsion is by waterjet, which gives a very shallow draught and extraordinary maneuvering capabilities. The waterjets are normally driven by gas turbines but may also be driven by small diesel engines in order to reduce infrared signature. The waterjet nozzles can be moved independently to manoeuvre the Skjold sideways without side propellers or bow propellers. The Skjold retains its ability to turn through very sharp angles even at high speed.

The prototype has a CODAG (Combined Diesel And Gas turbine) propulsion system, with two Rolls-Royce Allison 571KF gas turbine engines, each rated at 6,000kW (8,160hp), driving two Kamewa water jets and two auxiliary engines, MTU 6R 183 TE52 rated at 275kW. These provide a maximum speed of over 100km/h (55kt). Correction by RAF 110km/h 60kt

"Waterjet propulsion provides high speed and manoeuvrability."The new series of Skjold class ships will have COGAG (Combined Gas turbine And Gas turbine) propulsion and will be fitted with four gas turbines from Pratt % Whitney, two ST18M rated at 2 x 4,000kW and two ST 40M rated at 2 x 2,000kW, driving the two Kamewa water jets. There are also two MTU 6R TE92 manoeuvring engines rated at 3,700kW. KNM Skjold has been refitted with this propulsion system.

Two MTU 12V TE92 lift fan engines, rated at 735kW, drive the air into the air cushion between the hulls. A computer controlled ride control system controls the air cushion at a 0.5m water column pressure.


Off Topic - get to norway (Stavanger/Bergen/Olso) next year for the night before Noggie National Day - Crazy

Ben G
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4th Jun 11 at 14:21   View User's Profile U2U Member Reply With Quote

doesn't look very stealth to me.

guess it's different if they are miles away on the horizon though.
RichR
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4th Jun 11 at 14:23   View Garage View User's Profile U2U Member Reply With Quote

not as good as Bell
Jamie Walby
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4th Jun 11 at 14:23   View User's Profile U2U Member Reply With Quote

RichR
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4th Jun 11 at 14:26   View Garage View User's Profile U2U Member Reply With Quote

then you've got the Swedish Navy's Visby Class Vorvettes too. They're all cool; We don't have anything of that size but we do have something
AK
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4th Jun 11 at 14:42   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Ben G
doesn't look very stealth to me.

guess it's different if they are miles away on the horizon though.


stealth as in radar detection..... not to the human eye
AK
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4th Jun 11 at 14:44   View User's Profile U2U Member Reply With Quote

I still cant quite comprehend that thing doing 60kts though.....

Our fast rescue boats do about 30kts and they are great fun They are only about 3m long though
LeeM
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4th Jun 11 at 14:47   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by AK
quote:
Originally posted by Ben G
doesn't look very stealth to me.

guess it's different if they are miles away on the horizon though.


stealth as in radar detection..... not to the human eye


Ben G
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4th Jun 11 at 14:50   View User's Profile U2U Member Reply With Quote

should be stealth in both ways.
John
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4th Jun 11 at 14:52   View User's Profile U2U Member Reply With Quote

It's probably stealth enough to not see it by eye until it's too late.

They'll already be after you and your bot can only travel half the speed of theirs.
AK
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4th Jun 11 at 14:52   View User's Profile U2U Member Reply With Quote

what

How far can your eye see? In dark? in poor visibility.....

Stealth is for sneaking 'under the radar' NOT cruising 1km by a dozy fishing boat.
jr
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4th Jun 11 at 15:16   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Ben G
should be stealth in both ways.


Don't talk bollocks ben
Ben G
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4th Jun 11 at 16:15   View User's Profile U2U Member Reply With Quote

Crap baiting tbh would be nice to have a proper sea camo boat with stealth though.
chrisritch
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5th Jun 11 at 15:50   View User's Profile U2U Member Reply With Quote

very james bond
Ste
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5th Jun 11 at 15:54   View Garage View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Ben G
Crap baiting tbh would be nice to have a proper sea camo boat with stealth though.


Would you not think that maybe that IS sea cammo? Do you think they'd go to all the trouble of that and paint it to hide in trees?


I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.
Nath
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5th Jun 11 at 17:06   View User's Profile U2U Member Reply With Quote

Alot of from Ben G in this thread.
Ben G
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5th Jun 11 at 17:12   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Ste W
quote:
Originally posted by Ben G
Crap baiting tbh would be nice to have a proper sea camo boat with stealth though.


Would you not think that maybe that IS sea cammo? Do you think they'd go to all the trouble of that and paint it to hide in trees?


sea camo:

AK
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5th Jun 11 at 17:22   View User's Profile U2U Member Reply With Quote

but i can see that......




Anyway....

Think of Norway.... its coast line/fjords. The camo will blend into the backgrounf of rocks and bush/grass. Just look at the pics above.

 
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