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Californium 2250- final submissions


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detailed below is the expected format of the final submission.
The date is set as Wednesday the 19th of June at 23:59 GMT.

Again, incomplete designs may be submitted as they are and will be judged as seen fit.


Vehicle Designation and name

[insert 3-projection (front, top, side) and isometric render of vehicle here)

Table of basic statistics:



Mass, combat


Length, combat (transport)


Width, combat (transport)


Height, combat (transport)


Ground Pressure, MMP (nominal)


Estimated Speed


Estimated range


Crew, number (roles)


Main armament, caliber (ammo count ready/stowed)


Secondary armament, caliber (ammo count ready/stowed)



Vehicle designer’s notes: explain the thought process behind the design of the vehicle, ideas, and the development process from the designer’s point of view.

Vehicle feature list:

1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.

2.     Engine- type, displacement, rated power, cooling, neat features.

3.     Transmission- type, arrangement, neat features.

4.     Fuel- Type, volume available, stowage location, estimated range, neat features.

5.     Other neat features in the engine bay.

6.     Suspension- Type, Travel, ground clearance, neat features.


1.     Link to Appendix 1 - RFP spreadsheet, colored to reflect achieved performance.

2.     Link to Appendix 2- armor array details.

3.     Non-specified survivability features and other neat tricks- low profile, gun depression, instant smoke, cunning internal arrangement, and the like.


A.    Weapons:

1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.

2.     Main Weapon-

a.      Type

b.      Caliber

c.      ammunition types and performance (short)

d.     Ammo stowage arrangement- numbers ready and total, features.

e.      FCS- relevant systems, relevant sights for operating the weapon and so on.

f.      Neat features.

3.     Secondary weapon- Similar format to primary. Tertiary and further weapons- likewise.

4.     Link to Appendix 3- Weapon system magic. This is where you explain how all the special tricks related to the armament that aren’t obviously available using Soviet 1961 tech work, and expand to your heart’s content on extimated performance and how these estimates were reached.

B.    Optics:

1.     Primary gunsight- type, associated trickery.

2.     Likewise for any and all other optics systems installed, in no particular order.

C.    FCS:

1.     List of component systems, their purpose and the basic system architecture.

2.     Link to Appendix 3- weapon system magic, if you have long explanations about the workings of the system.


1.     List vehicle features which improve its fightability and useability.

Additonal Features:

Feel free to list more features as you see fit, in more categories.

Free expression zone: Let out your inner Thetan to fully impress the world with the fruit of your labor. Kindly spoiler this section if it’s very long.

 Example for filling in Appendix 1

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Hakika si Kundi la Dudes Nyeupe (HKDN) Submission: Object 426 "Stumpy"





Table of basic statistics:





Mass, combat


54.8 mt


Length, combat (transport)


6.2 m/9.7 m (gun forwards)


Width, combat (transport)


3.8 m


Height, combat (transport)


2.6 m (to top of commander's hatch)


Ground Pressure, MMP (nominal)


114 N/m2


Estimated Speed


60 km/h on road, 40 km/h off-road


Estimated range


400 km


Crew, number (roles)


4 (commander, driver, loader, gunner)


Main armament, caliber (ammo count ready/stowed)


85 mm L/70 high-pressure gun (30 rounds in protected rack under blow-off panels in turret rear, 5 rounds in ready/emergency racks in fighting compartment)

Secondary armament, caliber (ammo count ready/stowed)


7.62 mm coaxial machinegun (1200 rounds)


12.5 mm machinegun (1200 rounds)


250 mm Large Universal Body (LUB) missiles (4 in armoured boxes on turret sides)


Vehicle designer’s notes:


HKDN's object 426 (provisional designation "Stumpy", provisional identifier "Xer") is intended to provide mobility, protection and firepower which meets or exceeds requirements at a low weight. It uses proven track, suspension, engine and transmission components, and combines them with innovations in firepower and protection to produce a superior fighting vehicle capable of taking on all comers. 


Vehicle feature list:




1.     Link to Appendix 1- RFP spreadsheet, coloured to reflect achieved performance.


2.     Engine- 2x V-10 diesel (based on V-46-6 engine), 32.3 l displacement each, 650HP each, liquid cooled, coolant piped through armoured conduit to radiators in rear.


3.     Transmission- planetary, synchromesh, hydraulically assisted (based on T-72), 7 forward gears and 1 reverse gear; engine forward; transmission to rear.


4.     Fuel- diesel, 1350 l total capacity, stowage in forward hull and fighting compartment floor, 400 km estimated range, acts as additional armour against frontal attacks and mine blasts.


5.     Engine bay is designed so that individual engines can be lifted out as power pack units. Transmission and engines are set up so that the tank can run even if one engine is disabled .


6.     Suspension- torsion bar with hydraulic shock absorbers, 20-32 cm travel, 50 cm ground clearance, based on proven design of T-72.





Layout of armour and protective components:

Dark red - mantlet

Red - frontal arrays

Orange - turret side arrays

Gold - driver's side array

Yellow - fighting compartment side arrays

Green - roof array

Black - fuel

Grey - Automotive components: engines, drive shaft, transmission, radiators

Not shown - 25 mm HHA side skirts, 45mm base armour, turret basket, armoured ammunition stowage, armoured boxes for LUB missiles


1.     Link to Appendix 1 - RFP spreadsheet, colored to reflect achieved performance.


2.     Link to Appendix 2- armor array details.


3.     Non-specified survivability features and other neat tricks - smoke grenades, use of fuel cells and radiators as armour, rear radiator housings double as large    escape hatches for crew.




A.    Weapons:


1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.


2.     Main Weapon-


a.      Smoothbore cannon (510 MPa working pressure)


b.      85mm calibre


c.    Ammunition -

       Common: 75 x 500 mm composite case (158 mm at base), combustible case wall and steel case stub, 19-21 kg total round weight.

       APHE-FS: 11.4 kg, 1000 m/s, 250 mm RHA penetration at 500 m, 210 mm RHA penetration at 2000 m.

       APCR-FS: 3.2 kg, 1900 m/s, 330 mm RHA penetration at muzzle.

       HEAT-FS (steel liner): 11.4 kg, 1000 m/s, 200 mm RHA penetration.

       HEAT-FS (precision-formed copper liner, precision-formed explosive, wave shaper, improved fuse assembly): 11.4 kg, 1000 m/s, 350 mm  RHA penetration.

       HE-FS: 11.4 kg, 1000 m/s, ~15 mm RHA penetration


d.    Ammo stowage arrangement- 30 rounds in 3 linear racks in turret rear. Racks are behind armour and under blow-off panels. 5 rounds in emergency/ready racks scattered around fighting compartment. Racks are motorised to bring rounds forwards to front of rack. Loader accesses rack using motorised door.


e.   FCS- gun is electro-hydraulically stabilized in 2 axes (based on T-72). Maximum gun elevation/depression is +20/-5 degrees.


f.    The high-pressure 85mm gun allows rapid-fire engagement of multiple targets thanks to its high velocity and lightweight ammunition. Penetration is sufficient to deal with most threats at combat ranges, with high-priority targets being engaged by LUB missiles. A standardised muzzle velocity simplifies aiming when switching ammunition types. The APCR-FS uses an aluminium body, 28x420mm maraging steel core and 13x51mm tungsten alloy tip to provide a high-penetration kinetic round for close-in combat (0-500m). 


3.     Secondary weapons-


            a.    7.62 mm coaxial machinegun, 1200 rounds


            b.    12.5 mm machinegun, 1200 rounds, mounted in rotatable pintle on commander's hatch.


            c.     4 x 250 mm LUB missiles (described further in Appendix 3)


4.    Link to Appendix 3 - Weapon system magic. This is where you explain how all the special tricks related to the armament that aren’t obviously available using Soviet 1961 tech work, and expand to your heart’s content on extimated performance and how these estimates were reached.


B.    Optics:


1.     Primary gunsight - stabilized gunner's sight in turret roof. Stabilization is 2-axis, with gun calibrated to sight (described further in Appendix 3)


2.    Secondary optics -

      Secondary telescopic mounted coaxial to gun.

      Observation periscopes for commander and loader. Commander's periscope is stabilized.

      Vision blocks in commander's hatch.


C.    FCS:


1.    Main gun fire control is fairly conventional aside from sight-slaving system. Missile fire control is via main or secondary gun sight, with radar/optical  aiming system mounted coaxial to gun.


2.    Link to Appendix 3 -weapon system magic




1.     Large commander's and loader's hatches improve ingress/egress. Rear hatches allow rapid evacuation and assist in reloading vehicle.

2.     Small size and weight of vehicle increases strategic mobility. Low ground pressure and high power-to-weight ration increases tactical mobility.

3.     Larger number of crewmen and design of engine bays improves serviceability of vehicle.

4.     Smaller main gun increases number of rounds which can be stowed, eases ammunition handling.

5.     LUB missiles provide one-hit-one-kill capability against any and all likely targets. The large, modular design of the missile body allows it to be upgraded over the life of the vehicle.   

6.     The use of known automotive, suspension, gun and optical components based on the venerable T-72 design eases development time and increases reliability.


Additonal Features:


Additional and optional features are detailed further in Appendix 3. These include a smaller-diameter missile to replace the LUB missile, a 145mm low-pressure gun to replace the 85mm gun, a commander's stereoscopic rangefinder and an addon ERA package.




Free expression zone:


"As leaves gently fall

so too will Cascadia,

thanks to our big stick."

- dedication by the design team of HKDN to Object 426 project



HKDN senior design team engineers on Object 426 project. Left to right: Chadina Blake-Smythe, Sora Jina-Bandia and Ukelele Brown-Davis.

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AFV-50 — T-52

(Object 138)

A Product of SierraNevadaVagonzavod


Chief Designer



Aeronautical Engineering, Drafting, Armor, and Hypervelocity Threat Projectile Testing Objects (HTPTO)

A. T. Mahan


Advanced Technology Bureau, Ramjet Propulsion Development

Hephaestus Aetnaean


Digital Computing and Hypersonics, Computational Armor Optimization:



Advanced Design Bureau




Space Operations











Table of basic statistics:






Mass, combat


49 365kg (W/ERA, 47 982 W/O ERA)


Length, combat (transport)




Width, combat (transport)


Width, with ERA: 4.251m

Width, no ERA: 4.0m

Width over tracks: 3.86m

Height, combat (transport)




Ground Pressure, MMP (nominal)


231.1 kPa (88.4 kPa)


Estimated Speed


>75kph (25-33hp/ton)


Estimated range


460km on internal fuel, 720km with additional external drums


Crew, number (roles)


3 (Commander, Gunner, Driver-Mechanic)


Main armament, caliber (ammo count ready/stowed)


125mm Smoothbore Gun 2A35 (30 Ready, 45 Total)


Secondary armament, caliber (ammo count ready/stowed)


Coaxial 7.62mm PKT (2000 ready, 4000 total)

Commander's KPVT (100 ready, 500 stowed)




Vehicle designer’s notes: As chief designer of the 2250 Heavy Tank program at SNVZ, we had spent quite some time theorizing about ways to remedy the, frankly, superiority of the Cascadian "Norman" Medium Tank over current Californian vehicles. Our design needed to not only meet the Norman, but exceed it, by enough to ensure that no simple upgrades of the Cascadian design could undermine the qualitative advantage our design held. Where the Norman is, in many ways, a radically re-designed and improved T-55, SNVZ decided to take a similar approach with the far superior T-72. The result is a robust, light weight, technologically advanced, and astoundingly lethal vehicle which can be comfortably operated in all environments which it could expect to face, from the heat of the Mojave to the alpine chill of the Sierra Nevadas.


Vehicle feature list:


1.    APPENDIX 1: https://mega.nz/#!IQhH3YJA!kXnIfS2rWaeVaA1hM8ouQwpfTQ08K4qW3jNOIY8a_Ig


2.     Engine- EVDS-2230-2 V-12, 2,230 cubic inch, 1,562hp, water cooled, FADEC, electronically controlled fuel injection, and twincharged.


3.     Transmission- CD-1750 crossdrive-type eight-speed manual gearbox, mounted in VPK-3B powerpack, able to handle much greater power.


4.     Fuel- Type, Automotive diesel, 1,200L + 416L stowed in the hull and in auxiliary quick-detach barrels at the rear hull, 460km internal/720km with aux tanks, auxiliary tanks can be jettisoned remotely from driver or commander's position.


5.    Under-armor APU (52hp, 15kW), mechanical cooling system for driver-mechanic.


6.     Suspension- Torsion-bar, +325mm/-125mm travel, 490mm ground clearance, rotary-type shock absorbers on all arms, modularized easily-replacable design.




1.     Link to Appendix 1 - https://mega.nz/#!IQhH3YJA!kXnIfS2rWaeVaA1hM8ouQwpfTQ08K4qW3jNOIY8a_Ig



3d212d2IyNb-xw-VaLlSTSD3mZyoHF9d0PDGKXHVlM6TP9631Hnr8hM6uGWaT1KoFWdCPnjrD-1hRXie9j-mXCeafOS52lKBdCNb07su4gK3ej3CabUnBWPuvyic5al8jaSPzzDb Turret Frontal Armor qu_2IshqgcXOCd9L3YL8ir1p9Xgl5Rl6qODiVPgGGGNlq7qYC8yPQQfH7QIM6XpSx944LT6iWQdnYb2Mg6Cqv-Ou0FWbMLyL-N5rDD25o3b1pdQ8W7jxRaDO56CvHGfH0tarDPeH Turret Side Armor


2.     Link to Appendix 2- armor array details: https://mega.nz/#!IRhBUaDS!6a01a-Z6tpCzOeqzdGqxoo9poVTBN4RQ-nMIRHVabQU


3.     [In Spoiler Box]



A- Low profile- 2.41m turret roof height, 2.56m top of commander’s sight, extremely low profile in hull-down positions.

B- Frontal 80-degree arc of turret (80 degrees either side of centerline) - No less than protection against 1100/1500mm RHAe tandem charge chemical penetration and 800mm RHAe kinetic threats without ERA. Outer armor array panel is proof to 110mm RHAe threats, i.e. autocannon fire. ERA uses an advanced multilayer conformal design.

C- All ammunition separated from the crew in wet stowage bins with water.

D- Instantaneous multispectral smoke grenade dischargers, 16x for frontal arc coverage and 10x for the direct front; two salvoes for frontal arc; direct front array is manually actuated.

E- Automatic halon-based fire suppression system.

F- Optional (w/ 7 year R&D) all-aspect hard/soft-kill active protection system.





A.    Weapons:


1.     Link to Appendix 1- https://mega.nz/#!IQhH3YJA!kXnIfS2rWaeVaA1hM8ouQwpfTQ08K4qW3jNOIY8a_Ig


2.     Main Weapon- 2A35 (image in spoiler tag)


yuzZSkJNsbdr72LIW62U5cxogJfG55i4K7_iugggaLql9VTTt12CUw-x-IC8Ek_goJZ1c662jt6clUlABtCXOrkUXc5r4KwhrfS6bhAWXAEG2W7QdMVfJxUeWRkspWTLXOskHgdS 2A35 + PKT Coax


a.     Type: Smooth Bore Tank Gun


b.      Caliber: 125mm L/48


c.      Ammunition types and performance (short)

  1. 3BR1 APCBC-FS [Modified BR-472 projectile at 1,245m/s]
  2. 3OF1 HE-FS [950m/s]
  3. 3OF2 DEMO-FS [It’s a oversize HE round to replace the venerable 152mm assault gun in urban combat]
  4. 3BK1 Tandem-charge HEAT [55/115mm HEAT, 915m/s]
  5. 3BK2 Triplex-charge HEAT [85/115/115 HEAT, 915m/s]
  6. 3UBM3 AP-SFRJ: See Appendix 3 for details
  7. 3BM2 Hypervelocity Threat Projectile Testing Object: (750x50mm rod at 1,580m/s)
  8. 3BM3 Hypervelocity Threat Projectile Testing Object: (850x36.4mm segmented rod at 2,000m/s)



Ammunition for 125mm gun 2A35

L-R: 3BK1, 3BK2, 3OF1, 3BM4, 3BM3, 3BM2, 3BR1

(3BM2, 3BM3, and 3BM4 are HVTPTO)


d.     Ammo stowage arrangement


The AL-type carousel-pattern automatic loader is capable of handling cartridges of 950mm overall length (technically 975 is the physical limit, but it is believed that a 950mm cartridge overall length limit allows significant room for growth while leaving some clearance inside the autoloader). It services the gun in circa 6 seconds, providing a reliable 10-round-per-minute rate of fire. It is fed by a 30-round carousel, with the cartridges arranged vertically around the turret ring. Reloading the autoloader carousel is conducted by the crew, and most of the shells are a single-person lift. Some of the more exotic types, including but not limited to 3BR1, 3BK2, 3OF1, 3OF3, and 3UBM3 are shipped separately as two pieces, and assembled during loading into the autoloader carousel due to the high projectile weight.


The vehicle is provided with two hull ammunition racks flanking the driver, which are not able to be loaded from in combat and are NOT capable of storing 3BK2, 3OF3, or 3UBM3. The autoloader separates the turret basket from the hull with a steel splinter-protective bulkhead of 5mm thickness and the driver is unable to maneuver those sorts of ammunition through the loading hatch. Total ammunition stowage for the main gun is 45 rounds, 30 in the autoloader and 15 in the hull storage racks.


e.      FCS- relevant systems, relevant sights for operating the weapon and so on. 


The 7M13 fire control system and its 5E1 Turret/Weapon Management Computer (TWMC) provide gun-follows-sight operation. Bearing information from the sights is combined with the rangefinder setting automatically and continuously by the 5E1 to create ballistics solutions, which are fed forward to the gun laying system. The 7M13 is able to control the 2A35 or the coaxial PKT and the commander’s KPVT simultaneously at a ballistic solution rate of 20Hz. Commander's KPVT can be run with a "Gun-Follows-Sight" logic. Computed ballistic solutions are then transmitted through the gunlaying subsystem, which integrates stabilizer feedback in an analog system and drives the controlled weapons to meet the trajectory demand. The TWMC then implements continuous-consent firing, tracking actual gun position against demanded and firing once aligned. Additionally, the TWMC is responsible for providing guidance commands for the AP-SFRJ projectile based on the SACLOS tracker.


Ballistic solutions take into account ammunition type (acquired automatically from the autoloader), barrel droop and wear (acquired from the muzzle reference sensor and a log of the ammunition fired), turret traverse, vehicle cant, wind speed/direction, as well as external atmospheric pressure, temperature, and humidity. All parameters are acquired automatically by vehicle sensors, avoiding manual input into the system outside of the sights and rangefinder.


Crew interaction with the vehicle automation systems, including the 5E1 and 5E3, takes place through two Crew Display Units (CDUs) provided to the commander and gunner. The CDUs consist of backlit direct-drive TN LCD panels with pre-printed graphical objects and offer both daytime (5W fluorescent backlight) or nighttime (5W incandescent red) illumination. The CDUs display current computer status, gunlaying information, and provide a 64-character text input mode for digital communication and computer control. Interaction is provided through a integrated QUERTY keyboard as well as glove-compatible side buttons.


Each CDU is controlled by a driver IC made on the 100μm node implementing a write-line UART serial communication scheme from the TWMC. User input is fed back to the TWMC over a second serial bus.



f.      Neat features. -- See Above


3.     Secondary weapons- 

Coaxial PKT:

Feeding from left to right with a disintegrating link belt. Mounted in the Mk.18 mount, and provided with 4000 rounds ammunition, of which 2000 is ready. Integrated into the main gun FCS.





Commander's KPVT:




The commander is provided with a 14.5x114mm KPVT heavy machine gun mounted to the cupola, with a sighting and control system for use while under armor. This is provided with 100 rounds of linked ready ammunition, and a further 400 rounds stowed in the turret basket in ammunition cans, with provision made to stow extra ammunition cans to the turret roof for quick reloads. The commander’s KPV can also be used as a manually operated anti-aircraft gun. It was chosen to provide a range overmatch against Mormon forces, as the 14.5x114mm cartridge possesses nearly twice the muzzle energy of the 12.7x99mm round, and has commensurately better long range performance. The Commander’s machine gun is provided with a 1-8x variable power periscopic optical system for use under armor, and back-up iron sights. Control is through electric motors and geared drive, and the gun can be slaved to the sight. It provides light vehicle and anti-infantry capability to 3,000m. The mount is fully stabilized and is able to be used effectively while on the move, and incorporates F50 NGVII image intensifying tubes



4.     Link to Appendix 3- Weapon system magic. (Also APS system and Semiconductor production) https://mega.nz/#!EBRiRQ6Q!5wYPI0yDpF_8qGgA5KHUR1cHtbtmdFy8nxn5XOECdHc


B.    Optics:


1.     Primary gunsight

The TPD-2-49 stereoscopic rangefinding sight assembly is a fully stabilized rangefinder and gunsight with day / night capabilities. Day sighting is provided by two sights, a high field of view periscopic unity sight and a 3 to 12 power variable magnification periscopic sight with illuminated reticle. Night sighting is provided by F50 image intensifying tubes mounted in both the periscopic portion of the sight assembly and in the rangefinder. (F50 is part of the Night Vision Generation II image intensifier program discussed in Appendix 3, Part D: Electro-optical Program Night Vision Generation II.) Provision is made for the replacement or augmentation of the image intensifying system with a thermal imaging system when such a system is ready. The sight is arranged so that replacement of the stereoscopic rangefinder with a laser rangefinder system is possible.

Range information from the TPD-2-49 is automatically transmitted to the 7M13 FCS and is included in the gun-follows-sight control scheme: the ballistic solution is continuously updated by the 5E1 and the gun aimed as the range is dialed in. As a result, firing can take place immediately after the correct range is found.



The commander’s hunter-killer cupola with TDD-3 optical complex is provided with a 1-8x variable power periscopic optical system for use under armor. Control is through electric motors and geared drive, and the 125mm gun can be slaved to the sight (commander's override). In combination with the 14.5mm KPVT machine gun, TDD-3 provides light vehicle and anti-infantry capability to 3,000m, as well as hunter-killer and slew-to-cue capabilities. The mount is fully stabilized and is able to be used effectively while on the move, and incorporates F50 NGVII image intensifying tubes for night operations.


C.    FCS:


1.     List of component systems, their purpose and the basic system architecture.

  • TPD-2-49 244cm coincidence rangefinder-sight (GCRS) complex
  • TDD-3 Commander’s Independent Rangefinder-Sight (CIRS) complex
  • 7M13 Electronic Fire Control System
  • 5E1 Turret/Weapon Management Computer (TWMC)

2.     Link to Appendix 3- weapon system magic, if you have long explanations about the workings of the system. https://mega.nz/#!EBRiRQ6Q!5wYPI0yDpF_8qGgA5KHUR1cHtbtmdFy8nxn5XOECdHc




1.     List vehicle features which improve its fightability and useability.

  • Low Crew Requirements
  • Turret armor defeats >BGM-1 60/160 CE and ≥500mm KE to 161.5° of turret traverse
  • High Degree of Automation
  • Improved battlefield accuracy and see-shoot time through digital FCS
  • Autoloader allows true Fire / Load on the move capability
  • Excellent night-fighting capacity through the provision of Gen-III Equivalent I2 tubes, both in the vehicle and for personnel.
  • Digital systems improve maintenance and wear tracking, allow better supply chain management
  • Power-Pack enables fast maintenance
  • Turret modular armor package design eases growth / upgrades and battle damage repair
  • Semiconductor advances allow rapid development of advanced computing systems
  • Guided KE ramjet round lethal at extended ranges, quite accurate, short flight time
  • Light weight eases infrastructure wear from training maneuvers, increases strategic/operational mobility
  • Small silhouette - Turret exposes same frontal area turned up to 40 degrees off centerline
  • Advanced armor suite and crew Force-Multiplication measures (hard-shell crew helmet, dual-tube night vision devices)
  • Advanced digital radio encryption for safe battlefield communications
  • Text-Messaging through the radio system extends communication range where voice TX is unintelligible

Additional Features:


Feel free to list more features as you see fit, in more categories.

Crew Comfort


1. Heat management: To reduce the rate of crew fatalities and electronics failure when operating in the Mojave and Sonora Deserts, the vehicle is fitted with a 15,000BTU mechanical cooling system in the turret radiating through the bustle storage bin, and a secondary 6,000BTU unit in the hull connected to the engine radiators. They are controlled by an automotive type thermostat system, incorporating temperature and fan speed controls. Air intake is filtered through the NBC protection system. Heating is provided in the turret by electrical heating elements in the air conditioning system, and in the hull by heat from the engine or APU radiator.

2. Potable water storage is provided for 100 litres, providing 4L per crewmember per day for seven days, with a little extra. Provisions are made for the internal and external stowage of water in one- and two-liter canteens and 20-liter cans.

3. Boiling Vessel. Allows cooking rations for the crew and infantry, and hot drinks during the winter.

4. All crew stations are provided with significantly more room than in legacy vehicles, with an average of 1.5m^3 per station. This is due to the turret shaping and removal of the loader’s position. This is also vastly more area than in either the M1972 or M1A1 tanks, or the Cascadian M2240 Medium.

5. Ammo loading - the automatic loader can be used to mechanically store ammunition in the Carousel, reducing bombing-up time and crew fatigue.

6. The use of a bore evaluator and NBC overpressure System reduces the inhalation of gasses known to the Californian State to cause cancer and reproductive harm by the crew.



1. Modularized suspension allows replacement with either tube-in-bar designs or hydropneumatic types, or simply replacement of torsion bars, in field conditions with minimal hassle.

2. The novel modularized armor package concept provides extremely high upgrade potential at very low cost and difficulty of upgrading, and allows the replacement of damaged arrays in the field.

3. While the VPK-3 powerpack provided truly revolutionary power in a compact package, the possibility of further improving efficiency is accounted for in the generous dimensional space provided. Upgrades are as simple as swapping the powerpack.

4. Sufficient SWAP-C is available for greatly increased electronic fits, and investigation is being conducted into hard-kill active protection systems, thermal imaging, and laser rangefinders, although these are in the prototype phase, and require further development before large scale deployment.

5. Novel autoloader of AL type allows the development of cartridges of overall length of 975mm, although current cartridges are designed to 950mm.

6. Significant space savings and repositioning of ammunition racks allow for the addition of up to 12 extra rounds of ammunition in hull stowage, bringing the ammunition supply to 58 rounds.








Free expression zone: Let out your inner Thetan to fully impress the world with the fruit of your labor. Kindly spoiler this section if it’s very long.



SNVZ design and pre-production staff, including comrade-academicians, comrade-engineers, and comrade-military-technical-advisors. Photo by Comrade Political-Moral Officer Lt. Col Allin Smythee-Redacted, PAFDPMR



The shock worker-engineers of Sierra Nevada VagonZavod (SNVZ) received a request for proposal of the Heavy Tank 2250, and set out to radically reshape the current paradigm of the heavy tank through scientific discovery and the application of true Marxist-Leninist principles as intersectionalized by Hubbard, Harris, Feinstein, and the other great thinkers who founded our ideological system. The requirements were found to be a worthy challenge, but the current pattern of heavy tank was found to be extremely regressive and problematical. Concurrent developments in electronic computers, by the team under Comrade Academician CkFinite offered great promise in many areas, while the implementation of a multitude of advances in tank technology, and liberal application of L. Ron Hubbard Thought, offered the capacity to reduce vehicle weight and meet the required specifications. The AFV-50 program was therefore governed by three guiding principles, the Three 50s: no more than 50 tons, no less than 50 years before obsolescence, and no more than 50% the unit cost of competitors vehicles.


The performance of the main armament were set not by the current state of the art of the enemy vehicle — it is highly likely that the Cascadian running-dogs will upgrade their M2240 medium tank with the revolutionary reactive armor concepts that they have inevitably stolen from our shock worker-engineers through some perfidy, requiring performance greatly in excess of the lethality requirements. SNVZ therefore chose to use rough estimates of the competitor vehicles’ performance, and the determination to produce the best armament Socialist-Dianetic methods can produce. They have succeeded. With aid from special forces Shock-Archaeologists and the SMVZ advanced technological development team, a survey was conducted to develop the most effective and efficient means of producing a tank, and to determine the state of the art. From this survey, it was determined that the current industrial base is roughly the equivalent of that available to the Union of Soviet Socialist Republics in approximately 1961. The survey showed that the state of the art in electronics standpoint was roughly equivalent, but further developments have rendered this moot — we are on the cusp of a revolution, and have determined means to produce electronic minicomputers and even microprocessors (the latter to a very limited degree) of approximately 10x the power of existing systems for less than 1/50th the cost. Additionally, it was determined that similar techniques would enable new radio electronics.


Following the survey, SNVZ shock engineers and program management teams determined that the pre-war Soviet Union M1972 heavy tank would be an acceptable advanced, yet rugged starting point. Research showed that the vehicle M1972 “Ural” and M1972A is well within the capability of the industry to construct aside from laser rangefinders. While this design was a very good vehicle, SNVZ knew that the outdated non-intersectionalized Marxist-Leninist-Stalinist principled guiding that design team were no match for L. Ron Hubbard thought, and set out to redesign the vehicle.


From this baseline, a series of improvements were suggested by the Political Division to the engineering divisions, to better suit the heavy tank to the Californian environment, as well as to apply the lessons learned throughout the service lives of the vehicles studied, as well as systems designed for the Soviet Union Object 187 heavy tank prototype and M2014 heavy tank. The list of suggested improvements was as follows:


1.     Improved armor
2.     Crew water stowage.
3.     Improved automatic loading mechanism using single-piece fixed ammunition.
4.     Improved all-digital gunnery-engagement complex
5.     Improved night-fighting capabilities
6.     APU of roughly 1-2 cylinders 
7.     Air Conditioning
8.     Improved engine power
9.     Incorporation of a powerpack engine-transmission complex
10.  Increased ammunition capacity in the automatic loader carousel
11.  Provision of a tank infantry telephone
12.  Larger air intakes and high capacity filters.
13.  Bar-in-tube suspension
14.  Improved CBRN protection 
15.  Fully stabilized gunner’s sight, with periscopic mirror head stabilized in two axes.
16.  Multi axis stabilization of the gun, following the sight and set up to index to a loading angle for the autoloader, and to allow full firing capability on the move.
17.  Electrical turret and gun drive
18.  Fully stabilized independent commander’s machine gun with remote operation and capability to overmatch Deseret snipers using 12.7mm rifles. 
20.  Improved frontal hull armor
21.  Automatic fire suppression.
22. Night optical systems obviating the need for any light emission, either IR or visual-spectrum
24.  Hatch covers providing 12.7mm AP protection to the crew when turned out
25.  Frontally removable gun, with separately removable barrel capable of being replaced with the standard service engineering vehicle or 5-ton repair truck crane. 
26.  Improved hunter-killer capability, providing the commander an independently stabilized optical train, turret cuing, and independent rangefinding while on the move.
28.  An electrically-heated water kettle to provide hot rations, and the provision to affix a distillation-purification system for bulk potable water production.
29.  Ammunition load of no less than the M1972 Heavy Tank
30.  Improved ride quality
32.  Incorporation of advanced secure telecommunications systems for crew intercommunication and vehicle-to-vehicle radiotelephony using the latest encryption methods.
33.  Improved transmission
34.  Fittings for tank riders
35.  Design for upgradeability in all systems
36.  Drive system packaged as powerpack to allow easier repair and maintenance.
37. Optional hard/soft-kill active protection system

While not all of the above changes were incorporated into the final vehicle, and the resulting vehicle bears more resemblance to the Object 187 prototype than the M1972 it was derived from, it is a wholistic improvement on prior art, and deconstructs, disrupts, and defines the concept of the heavy tank, in the pursuit of the Three D-s of Comrade Feinstein.

The design was prototyped, and it was found to perform better than the wildest specifications from the tankists. The turret is protected from all but the most directly rear angles from the most dangerous chemical penetration threat, the Cascadian pig-dogs’ 60mm/160mm diameter HEAT warhead in their BGM-1 guided antitank rocket. In fact, in the frontal 80-degree arc, it has protection from an 1100mm/1500mm RHAe tandem HEAT charge and an 800mm RHAe kinetic penetrator! The hull is similarly well protected, using a novel special armor array in lieu of the previous steel and textolite composite arrays, saving over 3,500kg (reducing the M1972’s characteristic front-heaviness) compared to the previous designs. Ammunition is protected through the use of innovative wet-stowage systems in the hull ammunition rack, increased armor protection to the automatic loader carousel, and improved, less-sensitive propellant blends. 

Despite all these novel features and protection levels comparable to the American M1A1HA, the Object 138 as delivered has a combat weight of under 48,000kg, a growth of less than 3,000kg compared to the M1972 heavy tank upon which it is based. When combined with improved engine output and the CD-1750 crossdrive-type manual transmission found in the VPK-3 powerpack complex, the Object 138 prototypes have demonstrated very high speed, in keeping with the rapidity of the vanguard forces of the DPRC. 

The prohibition of use of armor piercing fin stabilized discarding sabot-type projectiles was met with great relief by the aerodynamicists and engineers of SNVZ’s ammunition development team. It was met with similar relief by the armor development team, and they quickly took in hand an example of the 2A35 125mm smoothbore gun chosen for the vehicle, and developed the 3BM family of kinetic energy threat simulator test devices, including the 3BM3, a multi-segment design, which was theorized to be similar to types of perfidy under development by the Cascadians. The armor packages developed are proof to this most abhorrent of projectiles, and testing demonstrated its lethality against the Cascadian M2240 medium tank. Truly, they will be like lambs to the slaughter against the might of our armored vanguard.


-Comrade Shock Aerohydrodynamicist-Academician-Engineer A. T. Mahan


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Nordic Feminist Design Division presents: P2055 “Gaupen”














Table of basic statistics:



Mass, combat

  65 metric ton

Length, combat (transport)


Width, combat (transport)


Height, combat (transport)


Ground Pressure, MMP (nominal)


Estimated Speed


Estimated range


Crew, number (roles)

  2 (Commander, Gunner/Driver)

Main armament, caliber (ammo count ready/stowed)

  200mm L40 gun. (40 rounds, 15 in first autoloader).

Secondary armament, caliber (ammo count ready/stowed)

  7,62mm GPM (1200 rounds).


12,7mm HMG (500 rounds)


Vehicle designer’s notes:
The P2250 was designed to be as heavily armored as possible, with the smallest weight and profile.  We tried to make use of the new experimental technologies and developed our own hydrostatic transmission and hydropneumatic suspension. This allowed much greater low speed mobility and some interesting arrangements. With the cannon mounted to the chassis, the autoloader became simplified and allowed a higher theoretical rate of fire and a reduction of crew to only 2. 


1. Link to Appendix 1- Not realized because of lack of weight value. 


2. Engine - Kharkov 5TD (increased to 6 cylinder), 16L, 800HP, water cooled, constant speed.


3. Transmission - Hydrostatic, 1 Forward, 1 Neutral and 1 Reverse, engine forward; motor and controls in the rear, is a continuously variable transmission, allow the engine to run at a constant speed with instant torque. It features hydraulic breaking and locking on top of normal friction breaks, also has a minor regenerative capabilities.

Location of drive train components and their connections:



4.Fuel - Diesel, 1000L, sponsons, 400km, was planning to add optional fuel barrels for increased range, but scrapped because of time limit. 


5. Powerpack is set up as an open circuit hydraulic system, allowing it to power auxiliary equipment and other subsystems like the auto loader and suspension, or power tools.


6. Suspension- Hydropneumatic (Nitrogen), 500mm suspension travel, 500mm ground clearance. The suspension is a fully adjustable in arm suspension using a slider crank design. Each arm has a built in shock absorber and can be either electronically or manually adjusted. Each unit has an overpressure valve to limit damage to the unit during very rough travel. Each unit is a bolt on unit, making replacements easy and fast.


View of the suspension:










Red: Ammunition and cannon.
Blue: Composite armor.
Grey: Drive line components.
Green: Fuel. 
Brown: Crew. 



1.     Link to Appendix 1 - Not realized. 

2.     Link to Appendix 2- Not Realized,  has a 1000mm deep armor cavity at 1,79m^3 at the front, with a 900mm deep armor cavity at 180mm height on each sponsons. 


3. Non-specified survivability features and other neat tricks-
Very low profile vehicle with the ability to further reduce its profile by lowering its suspension. Very low profile while in hull down position.

Has blow off panels, light panels that are screwed in place to break off when ammunition ignites.   Fuel is used as side armor. 




A.    Weapons:


1.     Link to Appendix 1- Not realized.


2.     Main Weapon-


a.      Smoothbore cannon (510 MPa working pressure). 


b.      200mm caliber. 


c.      Ammunition:
         Common: 200 x 900 mm brass case, estimated 50kg. 
         HEAT: Not realized. 

         HE: Not relied. 

         AP: Not realized. 



d.     Ammo stowage arrangement- 15 rounds stored in primary shell conveyor, 25 rounds stored in secondary shell conveyor.  Entire system has blow off panels above it. The system is powered by the tanks hydraulic circuit. 



B.    Optics:


1.     Primary gunsight- two axis stabilized gunners sight.


2.     Drivers 3 vison telescopes. Commander features 360 degree coverage form the copula with a 4x sight connected to the RCWS. 


C.    FCS:


1.     FCS- Gun is rigidly mounted to the chassis. The gunner can select a firing mode to put the vehicle into precision mode.  Tracks turn to traverse the cannon, and the suspension adjusts to elevate to depress the gun. The gunners controls feeds into the suspensions control system, modifying the pressure in each individual suspension unit to accomplish the right elevation/depression. A gyroscope keeps track of the vehicles tilt and adjusts accordingly.  
The commanders station has duplicated controls and features a fully rotatable commanders copula with a range finder and 12,7mm remote operated HMG. The commander can measure the range and move the tank accordingly, giving a sort of hunter-killer system. 


2.     Link to Appendix 3- May be added in the future. 




1.     Ease of service and maintenance on the suspension units.

2.     Low maintenance transmission, hydraulic motors do not require a lot of maintenance.

3.     Reduced brake wear because of hydraulic parking break and minor regenerative breaking. 

4.     Reduced engine wear from running on a stable RPM. 

5.     It has a 200mm cannon. 

6.     Has a remote controlled weapons station, allowing the commander to avoid peaking his head out when firing on infantry.


Free expression zone:
The Nordic Feminist Design Division felt that there was a sever lack of special needs armored fighting vehicles which strives against our glories republics values. 
The team set out to make the most inclusive vehicle possible. The turret was quickly removed as it was seen as offensive to the crippled, gifted people of our republic.  Next was the issue with the height. The tank was too high to climb aboard for midgets little people, so a adjustable suspension was installed to allow the tank to lower itself. It was also of the highest importance that even our machines would bow to our Serene Highness. 

The gun was requested to be of at least 200mm caliber, which our lead engineer said was outrageous (our lead engineer has been REDACTED, and has been replaced by a more suiting, and diverse individual).  Our lead engineer agreed and work began to install the gun. Our female engineers noted that the ammunition was too heavy to be loaded manually for a woman, and was deemed discriminatory, so a autoloader was developed to accommodate the superior gender. 


As of currently our team failed to meet the deadline and has been REDACTED

Our team has been sent on a holiday in the North to sunbath in the north. 




A picture of our team of engineers going to work. 



All Hail Serene Highness.




(I will try to add the schematics tomorrow for the suspension and transmission, but it is 01:30 here, and I am taking the bus to work at 06:00. )

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OK, terribly sorry this has taken so long.  I have some follow-up questions I would like to ask the competitors:



1)  @A. T. Mahan / @Whatismoo / @ckfinite What is the angle from the horizontal between the top of the lens of the rangefinder to the top of the roof armor package (i.e. what is the maximum depression the rangefinder works at?)

1a)  Same as above, but with the front-facing periscope of the commander's cupola

2)  @Xoon Did you ever work out your armor scheme?

3)  @Toxn What is the height between the top of the hull fuel tank and the ceiling inside the turret?

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13 hours ago, Collimatrix said:

OK, terribly sorry this has taken so long.  I have some follow-up questions I would like to ask the competitors:

3)  @Toxn What is the height between the top of the hull fuel tank and the ceiling inside the turret?

1.486m exactly. Of course, with a turret basket et al it's probably more like 1.4m.


The loader is situated so that s/he can grab from the protected ammunition storage by his/her right shoulder and load into the breech without needing to stand up or move around too much.

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