Megalodon Class Attack Submarine

[The Teutonic Republic]

Megalodon Class Attack Submarine

OOC Note: The sub was modeled by yours truly in Dassault Solidworks 2014. If you want the model to fiddle around with just TG me and I can send you it by email in solidworks, stp, step, igs, or pretty much any format you want.

OOC Note: Please don't place orders here. Orders should be placed on the Kestrel Armaments storefront here. OOC comments/criticisms regarding the design/specs/etc of the sub are more than appreciated here. Also feel free to TG me as well.

Technical Specifications:

General characteristics:

• Type: Nuclear powered guided missile submarine (SSGN)
• Crew: 90
• Length: 165.0m
• Beam: 24.0 m
• Draft: 10.0 m
• Displacement:
  
  • 18,500 tons surfaced
  • 27,500 tons submerged

Propulsion:

• 1x 550 Megawatt lead cooled fast breeder reactor
• 2x secondary power units
• 1x pumpjet
  

Performance:

• Max Speed:
  
  • Surfaced: 15 knots
  • Submerged: 35 knots
• Max Depth
  
  • Test: 1,000 meters
  • Design: 1,250 meters
  • Crush: 1,500 meters
• Range: crew endurance

Armament:

• 36x Scylla anti-ship missiles
• 6x 533mm torpedo tubes
• 8x 650mm torpedo tubes
• 40x 533mm and 650mm torpedoes
• 40 VLS cells for wavreider, ESSM, or any other Mk. 41/57 compatible missiles
  

Overview:

Looking at other modern navies around the world the Teutonic Navy noticed a trend towards larger, super-heavy dreadnought type ships displacing more than 1,00,000 tons. Coming to the conclusion that the Teutonic Navy did not have a capable counter to these mega-sized assault ships the Teutonic Department of Naval Acquisitions contracted Kestrel Armaments to design a heavy attack submarine that could effectively deal with the threat posed by these ships. Thus the Megalodon class was born, a heavy attack submarine equipped with deadly hypersonic missiles and super-heavy torpedoes more than capable of sending any ship, regardless of its size or armor, plummeting to the ocean floor.

Armament:

Scylla heavy anti-ship missile:

The primary armament of the Megalodon class subs, the Syclla is a hypersonic anti-ship missile carried in 36 angled VLS tubes on either side of the conning tower. Designed with the capability to sink ships in the 1,000,000+ ton displacement range, the Scylla is quite possibly the most deadly (non-nuclear) anti-ship weapon ever created.

OOC Note: Like the sub this was modeled in Dassault Solidworks 2014. If you want the model to fiddle around with just TG me and I can send it to you in solidworks, stp, step, igs, or pretty much any format you want.

Technical Specifications:

• Weight: 12,500 kg
• Length: 14.5 M
• Warhead: 2,500 kg semi-armor piercing heptanitrocubane
• Propulsion:
  
  First stage: solid rocket booster
  Second stage: liquid hydrogen fueled dual-mode ramjet
• Range: 1,600 km
• Speed: Mach 12-15
• Guidance: Inertial Navigation System, GPS micourse guidance
• Launch platform: VLS

The Scylla borrows many design features form the Valkyrie hypersonic comber, another Kestrel Armaments design. Like the Valkyrie the Scylla is constructed from C/SiC composite which consists of carbon fiber reinforced silicon carbide produced using liquid polymer infiltration techniques. The composite is both lighter than other ceramic or metal matrix composite and retains a constant strength to weight ratio up to 1600 degrees centigrade. Underneath the C/SiC composite shell is a honeycomb matrix constructed out of Rene 41, a nickel based superalloy. Liquid lithium, which has a latent heat of fusion and vaporization temperature 8 times higher than water, is encased in the Rene 41 honeycomb and absorbs the heat build up of the outer C/SiC composite skin panels. The nosecone of the missile is constructed from tungsten which provides additional heat resistance while also allowing the missile to penetrate through any potential armor on the target ship.

Leading edges and control surfaces of the Scylla are constructed out of both zirconium and hafnium diboride which have a melting point of 3200 degrees centigrade and display good oxidation resistance up to 2000 degrees centigrade. These materials are more structurally rugged than carbon-carbon composites, have a higher radiative and temperature tolerance properties, and do not suffer from oxidation issues that carbon-carbon composites needs to be protected against with coatings, although all these advantages come at the cost of increased weight.

The Scylla uses the same dual-mode ramjet as the Valkyrie, albeit scaled down to fit within the confines of the missile. The missiles are cold launched from the Megalodon through 36 tubes which are arranged in two rows placed between the inner and outer hull inclined at a 30 degree angle and are covered with retractable flaps. After being boosted out of the launch tube the detachable rocket booster then activates and launches the Scylla out of the water and propels to an altitude of 20,000 meters and a speed of mach 3-4 before being jettisoned. The dual-mode ramjet engine of the Scylla them fires and propels it to its target. The dual-mode ramjet initially starts in pure ramjet mode where air is slowed to subsonic speeds before being combusted. As the Mach number is increased past about 4, the subsonic ramjet transitions into the dual-mode regime, where the combustor inlet Mach number is increased enough such that a thermal throat is created in the combustor and a pre-combustion shock train is generated. The isolator is designed to prevent this shock train from reaching the inlet to prevent catastrophic inlet unstart. In this regime the combustor operates in a mixed subsonic/supersonic, or dual-mode. The isolator flowfield contains multiple shock reflections, with complex shock-boundary-layer-interactions (SBLI). As the Mach number is further increased past about 6, the pre-combustion shock train moves out of the isolator and the combustor operates in the supersonic mode. The isolator and combustor involved in the dual-mode transition are labeled in the figure. At Mach numbers higher than about 6, the combustor operates in the supersonic mode. This regime is characterized by intense SBLI and mixing that is diffusion-limited due to the very high freestream velocities. In supersonic combustion mode the engine propels the Scylla to a final speed of mach 15, it's cruising and terminal speed.

Due to the the extremely high temperatures inside the dual-mode ramjet during hypersonic flight several exotic materials and thermal management systems have been used in the construction of the engine. As surfaces that dynamically change shape would impact engine performance materials with both an extremely low coefficient of thermal expansion and as well a high resistance to thermal stress were chosen. The edges of the high-speed inlet are constructed from titanium carbide and zirconium carbide embedded into a molybdenum matrix which has an extremely low coefficient of thermal expansion and possess a high recrystallisation temperature of 1600 degrees centigrade. Internal engine components are constructed from carbon fiber reinforced halfnium-tantalum carbide which has a melting point in excess of 3900 degrees centigrade. Active cooling of the engines consist of liquid hydrogen fuel pumped around the engine prior to combustion. A cooling jacket made from zirconium copper conducts heat from the engine onto active cooling panels made of C/SiC composite. The cooling panels consists of two plates sandwiching a set of roller which permits uniform thermal expansion in all directions and helps absorb the heat buildup from the engines.

The warhead of the Scylla is of the semi-armor piercing design with a 2,500kg heptanitrocubane explosive charge. Heptanitrocubane has an RE factor slightly less than Octanitrocubane (2.38) but it much more efficient due to its superior high density crystal form. The 2,500kg of heptanitrocubane is roughly equal to over 5,000kg of TNT and is is more than 50% more effective than either C4 or semtex. The extremely high cost of heptanitrocubane, as well as the extremely high cost of the Scylla in general, is justified in that the targets it will be attacking are significantly more expensive than regular ships of the line.



The guidance of the Scylla is relatively primitive. The plasma sheath the forms around the missile at hypersonic speeds effectively renders any sensors placed on the missile blind. The missile is thus guided purely through inertial guidance systems, GPS, and satellite targeting. The Scylla follows a high-low flight path where the rocket booster boosts the Scylla up to 20,000 meters where its scramjet activates. The Scylla then cruises at mach 12-15 at 20,000 meters until roughly 300 kilometers from the target where it gradually descends back to the ocean surface to follow a sea-skimming trajectory for the last 50 kilometers of its journey. During its terminal phase the Scylla begins S-shaped pseudo-random evasive maneuvering in order to avoid potential anti-missile countermeasures. The extreme speed of the Scylla however makes interception through guns or missiles rather unlikely and the extremely heat resistant frame and tungsten nosecone of the missile means laser weapons would also provide equally ineffective.

Additional Missile Armament

Supplementing the 36 Scylla Missiles the Megalodon carries 40 VLS launch cells capable of firing any mk. 41/57 compatible missile. The usual armament consists of a mix of either ESSM (extended range stealth missile) for land attack purposes or the "Wavreider" hypersonic cruise missile for additional anti-ship capabilities.

ERSM Extended Range Stealth Cruise Missile

3D model to come soon

Technical Specifications:

• Weight: 1600 kg
• Length: 5 M
• Warhead:
  
  • 450 kg thermobaric
  • 48 sensor fused anti-armor submunitons
• Propulsion: high-bypass turbofan
• Range: 5000 km
• Speed: Mach 0.8
• Guidance: Inertial Navigation System, multimode active e-scan radar, GPS, TERSCOM

Waverider Hypersonic Cruise Missile

3d model to come soon

Technical Specifications:

• Weight: 1,900 kg
• Length: 7.62 M
• Warhead: 450kg semi-armor piercing heptanitrocubane or thermobaric
• Propulsion:
  
  First stage: solid rocket booster
  Second stage: liquid hydrogen fueled supersonic combustion ramjet
• Range: 1,100 km
• Speed: Mach 5-7
• Guidance: Inertial Navigation System, terminal active radar homing

533 and 650 mm torpedo tubes

In addition to its missile armament the megalodon carries 8 650mm torpedo tubes and 6 533mm torpedo tubes. While theoretically capable of accepting any 533 or 650mm torpedo the Megalodon normally carries the 533mm supercavitating "barracuda" torpedo and the 650mm super-heavy "dragonfish" torpedoes. Up to 40 533 and 650mm weapons can be carried in the submarine's internal torpedo bay.

Barracuda Supercavitating Torpedo

3d model to come soon

Technical Specifications:

• Weight: 2,700kg
• Length: 8.2 M
• Warhead: 200kg heptanitrocubane
• Propulsion: Solid fuel rocket
• Range: 16 km
• Speed: 430 knots
• Guidance: inertial guidance (usually fired unguided at close range)
• Launch platform: 533mm torpedo tube

Dragonfish Super-heavy Torpedo

3d model to come soon

Technical Specifications:

• Weight: 6,500kg
• Length: 14.5 M
• Warhead: 1000kg heptanitrocubane
• Propulsion: hydrogen fuel cell powered pump-jet
• Range: 100 km
• Speed: 50 knots
• Guidance: inertial guidance, acoustic wake homing
• Launch platform: 650mm torpedo tube

Propulsion:

The Megalodon is powered by a liquid metal cooled fast-breeder reactor generating 550 MW of electrical power, the same reactor used in the Leviathan class cruiser (another Kestrel Armaments product). The reactor uses uranium-nitrite fuel and is cooled by lead-bismuth alloy which compared to sodium is safer since it does not react explosively with water.

The ship is propelled by a pumpjet connected through a carbon fiber shaft to a liquid-nitrogen cooled AC permanent magnet motor generating 150,000 shp. The motor is connected to a generator which is charged by the ship's nuclear reactor. The motor uses neodymium rare-earth magnets and liquid nitrogen cooled superconducting HTS wires around the DC coil and AC armature winding for increased performance. A flux collector further served to reduce AC efficiency loss. The bismuth - strontium - calcium - copper - oxygen (Bi-Sr-Ca-Cu-O) alloy superconducting wires in the motor are cooled to -200 degrees centigrade and reduce electrical resistance to almost zero. The cryogenically cooled motors are roughly a third volume and half the weight compared to a conventional motor with the same power output. The motor is geared down through an integral Pseudo Direct Drive System (PDD) consisting of an internal infinitely variable magnetic gearing system. The torque density of the magnetic gearing system is comparable to mechanical gearing systems while having efficiency in excess of 99% as well a complete lack of friction or wear as well as no need for lubrication.

For stealth purposes the nuclear reactor can be turned off and the motor powered by the subs bank of graphene-carbon nanotube ultracapacitors. The capacitors are unique in that they have an energy density comparable to that of a lithium ion battery while having a power density comparable to traditional supercapacitors. The composite film of the ultracapacitor consisting of graphene flakes and single walled carbon nanotubes is constructed by vaporizing a graphite rod filled with metallic catalyst power with an electric arc. The nanostructures are the mixed together to form an ink that is rolled into a paper. The graphene-carbon nanotube capacitors's specific capacitance is over three times higher than that of a capacitor made with carbon nanotubes only. When the capacitors run dry they are re-charged with the ships nuclear reactor.

Construction:

The Megalodon double hulls are both constructed out laser welded high strength grade 5 titanium. Compared to steel titanium has a much higher strength to weight ratio and thus enabled the Megalodon to dive to much greater depths than traditional steel hulled submarines.

Stealth:

The subs primary sonar countermeasure is a acoustic topological insulator coating which covers the entire surface of the submarine. The interior of the coating consists of a two dimension array of spinning metal cylinders in a triangular lattice. Each cylinder is suspended within a viscous fluid contained within a larger cylindrical shell made from a sonar-wave transparent material. The space between the cylindrical shells is filled with the same fluid. The rotation of each metal cylinder produces a little vortex in its surrounding fluid within its shell. Sound waves cannot propagate through the middle of this structure because the periodic pattern produces a sonic band gap.The coating is 4mm thick with each cylinder being 2mm in diameter. The coating absorbs more than 99% of the energy from sonar making the sub virtually impossible to detect using contemporary sonar systems.

Sensors:

Instead of periscopes the Megalodon uses two retracting phonics masts. Each mast is outfitted with an 111 Megapixel 300 frames per second CCD imager four inches in diameter and features an array of 10,560 by 10,560 pixels and has a 9 micro-pixel pitch. Near infra-red vision (0,9-1.7 micron) is provided by NIR cameras consisting of an InGaAs sensor (320 x 240 pixel) and a 25 mm, f/1.4 c-mount glass CCTV lens which provides a 28.7 x 21.7 degree field of view. The NIR images are captured as 720x486, 24-bit pixel RGB arrays. UV imagery is provided by ultraviolet, high resolution, 4.65 by 4.65 micropixel digital cameras with a 1/2 type progressive scan IT CCD sensor.

Sonar consists of a bow-mounted spherical active/passive sonar array, wide aperture lightweight fiber optic sonar array, two high frequency active sonars mounted in the sail and bow, and two Conformal Array (LCCA) high frequency sonar arrays.

Cost
Base Unit Cost: 6.5 Billion
DPR: 65 Trilion

[Havenburgh]

God damn... This is awesome.

[The Teutonic Republic]

God damn... This is awesome.

Thanks, haha. I basically took an Oscar class submarine and gave it an NS makeover (aka making it bigger and cramming it full of overpowered weapons).