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By order of Her Gracious and Serene Majesty Queen Diane Feinstein the VIII

The Dianetic People’s Republic of California

Anno Domini 2250

SUBJ: RFP for new battle tank

1.      Background.
As part of the War of 2248 against the Perfidious Cascadians, great deficiencies were discovered in the Heavy tank DF-1. As detailed in report [REDACTED], the DF-1 was quite simply no match for the advanced weaponry developed in secret by the Cascadian entity. Likewise, the DF-1 has fared poorly in the fighting against the heretical Mormonhideen, who have developed many improvised weapons capable of defeating the armor on this vehicle, as detailed in report [REDACTED]. The Extended War on the Eastern Front has stalled for want of sufficient survivable firepower to push back the Mormon menace beyond the Colorado River south of the Vegas Crater.
The design team responsible for the abject failure that was the DF-1 have been liquidated, which however has not solved the deficiencies of the existing vehicle in service. Therefore, a new vehicle is required, to meet the requirements of the People’s Auditory Forces to keep the dream of our lord and prophet alive.

 

Over the past decade, the following threats have presented themselves:

A.      The Cascadian M-2239 “Norman” MBT and M-8 light tank

Despite being approximately the same size, these 2 vehicles seem to share no common components, not even the primary armament! Curiously, it appears that the lone 120mm SPG specimen recovered shares design features with the M-8, despite being made out of steel and not aluminum like the light tank. (based on captured specimens from the battle of Crater Lake, detailed in report [REDACTED]).
Both tanks are armed with high velocity guns.

B.      The Cascadian BGM-1A/1B/1C/1D ATGM

Fitted on a limited number of tank destroyers, several attack helicopters, and (to an extent) man-portable, this missile system is the primary Cascadian anti-armor weapon other than their armored forces. Intelligence suggests that a SACLOS version (BGM-1C) is in LRIP, with rumors of a beam-riding version (BGM-1D) being developed.

Both warheads penetrate approximately 6 cone diameters.

C.      Deseret tandem ATR-4 series
Inspired by the Soviet 60/105mm tandem warhead system from the late 80s, the Mormon nation has manufactured a family of 2”/4” tandem HEAT warheads, launched from expendable short-range tube launchers, dedicated AT RRs, and even used as the payload of the JS-1 MCLOS vehicle/man-portable ATGM.
Both warheads penetrate approximately 5 cone diameters.

D.      Cascadian HEDP 90mm rocket
While not a particularly impressive AT weapon, being of only middling diameter and a single shaped charge, the sheer proliferation of this device has rendered it a major threat to tanks, as well as lighter vehicles. This weapon is available in large numbers in Cascadian infantry squads as “pocket artillery”, and there are reports of captured stocks being used by the Mormonhideen.
Warhead penetrates approximately 4 cone diameters.

E.      Deseret 40mm AC/ Cascadian 35mm AC
These autocannon share broadly similar AP performance, and are considered a likely threat for the foreseeable future, on Deseret armored cars, Cascadian tank destroyers, and likely also future IFVs.

F.      IEDs

In light of the known resistance of tanks to standard 10kg anti-tank mines, both the Perfidious Cascadians and the Mormonhideen have taken to burying larger anti-tank A2AD weaponry. The Cascadians have doubled up some mines, and the Mormons have regularly buried AT mines 3, 4, and even 5 deep.

2.      General guidelines:

A.      Solicitation outline:
In light of the differing requirements for the 2 theaters of war in which the new vehicle is expected to operate, proposals in the form of a field-replaceable A-kit/B-kit solution will be accepted.

B.      Requirements definitions:
The requirements in each field are given in 3 levels- Threshold, Objective, and Ideal.
Threshold is the minimum requirement to be met; failure to reach this standard may greatly disadvantage any proposal.

Objective is the threshold to be aspired to; it reflects the desires of the People’s Auditory Forces Armored Branch, which would prefer to see all of them met. At least 70% must be met, with bonus points for any more beyond that.

Ideal specifications are the maximum of which the armored forces dare not even dream. Bonus points will be given to any design meeting or exceeding these specifications.

C.      All proposals must accommodate the average 1.7m high Californian recruit.

D.      The order of priorities for the DPRC is as follows:

a.      Vehicle recoverability.

b.      Continued fightability.

c.       Crew survival.

E.      Permissible weights:

a.      No individual field-level removable or installable component may exceed 5 tons.

b.      Despite the best efforts of the Agriculture Command, Californian recruits cannot be expected to lift weights in excess of 25 kg at any time.

c.       Total vehicle weight must remain within MLC 120 all-up for transport.

F.      Overall dimensions:

a.      Length- essentially unrestricted.

b.      Width- 4m transport width.

                                                              i.     No more than 4 components requiring a crane may be removed to meet this requirement.

                                                             ii.     Any removed components must be stowable on top of the vehicle.

c.       Height- The vehicle must not exceed 3.5m in height overall.

G.     Technology available:

a.      Armor:
The following armor materials are in full production and available for use. Use of a non-standard armor material requires permission from a SEA ORG judge.
Structural materials:

                                                              i.     RHA/CHA

Basic steel armor, 250 BHN. The reference for all weapon penetration figures, good impact properties, fully weldable. Available in thicknesses up to 150mm (RHA) or 300mm (CHA).
Density- 7.8 g/cm^3.

                                                             ii.     Aluminum 5083

More expensive to work with than RHA per weight, middling impact properties, low thermal limits. Excellent stiffness.

 Fully weldable. Available in thicknesses up to 100mm.
Mass efficiency vs RHA of 1 vs CE, 0.9 vs KE.
Thickness efficiency vs RHA of 0.33 vs CE, 0.3 vs KE.
Density- 2.7 g/cm^3 (approx. 1/3 of steel).

For structural integrity, the following guidelines are recommended:

For light vehicles (less than 40 tons), not less than 25mm RHA/45mm Aluminum base structure

For heavy vehicles (70 tons and above), not less than 45mm RHA/80mm Aluminum base structure.
Intermediate values for intermediate vehicles may be chosen as seen fit.
Non-structural passive materials:

                                                            iii.     HHA

Steel, approximately 500 BHN through-hardened. Approximately twice as effective as RHA against KE and HEAT on a per-weight basis. Not weldable, middling shock properties. Available in thicknesses up to 25mm.
Density- 7.8g/cm^3.

                                                            iv.     Glass textolite

Mass efficiency vs RHA of 2.2 vs CE, 1.64 vs KE.

Thickness efficiency vs RHA of 0.52 vs CE, 0.39 vs KE.
Density- 1.85 g/cm^3 (approximately ¼ of steel).
Non-structural.

                                                             v.     Fused silica

Mass efficiency vs RHA of 3.5 vs CE, 1 vs KE.

Thickness efficiency vs RHA of 1 vs CE, 0.28 vs KE.
Density-2.2g/cm^3 (approximately 1/3.5 of steel).
Non-structural, requires confinement (being in a metal box) to work.

                                                            vi.     Fuel

Mass efficiency vs RHA of 1.3 vs CE, 1 vs KE.

Thickness efficiency vs RHA of 0.14 vs CE, 0.1 vs KE.

Density-0.82g/cm^3.

                                                          vii.     Assorted stowage/systems

Mass efficiency vs RHA- 1 vs CE, 0.8 vs KE.

                                                         viii.     Spaced armor

Requires a face of at least 25mm LOS vs CE, and at least 50mm LOS vs KE.

Reduces penetration by a factor of 1.1 vs CE or 1.05 vs KE for every 10 cm air gap.
Spaced armor rules only apply after any standoff surplus to the requirements of a reactive cassette.

Reactive armor materials:

                                                            ix.     ERA-light

A sandwich of 3mm/3mm/3mm steel-explodium-steel.
Requires mounting brackets of approximately 10-30% cassette weight.

Must be spaced at least 3 sandwich thicknesses away from any other armor elements to allow full functionality. 81% coverage (edge effects).

                                                             x.     ERA-heavy

A sandwich of 15mm steel/3mm explodium/9mm steel.
Requires mounting brackets of approximately 10-30% cassette weight.
Must be spaced at least 3 sandwich thicknesses away from any other armor elements to allow full functionality. 81% coverage (edge effects).

                                                            xi.     NERA-light

A sandwich of 6mm steel/6mm rubber/ 6mm steel.
Requires mounting brackets of approximately 10-30% cassette weight.
Must be spaced at least 1 sandwich thickness away from any other armor elements to allow full functionality. 95% coverage.

                                                           xii.     NERA-heavy

A sandwich of 30mm steel/6m rubber/18mm steel.
Requires mounting brackets of approximately 10-30% cassette weight.
Must be spaced at least 1 sandwich thickness away from any other armor elements to allow full functionality. 95% coverage.

The details of how to calculate armor effectiveness will be detailed in Appendix 1.

b.      Firepower

                                                              i.     2A46 equivalent tech- pressure limits, semi-combustible cases, recoil mechanisms and so on are at an equivalent level to that of the USSR in the year 1960.

                                                             ii.     Limited APFSDS (L:D 15:1)- Spindle sabots or bourelleted sabots, see for example the Soviet BM-20 100mm APFSDS.

                                                            iii.     Limited tungsten (no more than 100g per shot)

                                                            iv.     Californian shaped charge technology- 5 CD penetration for high-pressure resistant HEAT, 6 CD for low pressure/ precision formed HEAT.

                                                             v.     The general issue GPMG for the People’s Auditory Forces is the PKM. The standard HMG is the DShK.

c.       Mobility

                                                              i.     Engines tech level:

1.      MB 838 (830 HP)

2.      AVDS-1790-5A (908 HP)

3.      Kharkov 5TD (600 HP)

                                                             ii.     Power density should be based on the above engines. Dimensions are available online, pay attention to cooling of 1 and 3 (water cooled).

                                                            iii.     Power output broadly scales with volume, as does weight. Trying to extract more power from the same size may come at the cost of reliability (and in the case of the 5TD, it isn’t all that reliable in the first place).

                                                            iv.     There is nothing inherently wrong with opposed piston or 2-stroke engines if done right.

d.      Electronics

                                                              i.     LRFs- unavailable

                                                             ii.     Thermals-unavailable

                                                            iii.     I^2- limited

3.      Operational Requirements.

The requirements are detailed in the appended spreadsheet.

4.      Submission protocols.

Submission protocols and methods will be established in a follow-on post, nearer to the relevant time.

 

Appendix 1- armor calculation

Appendix 2- operational requirements

 

Good luck, and may Hubbard guide your way to enlightenment!

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OK, for those of you who just jumped into this; this competition is a sequel to the 2239 competition, and set in the same universe.  The backstory is that in 2029, a massive nuclear war devastated human populations across the globe.  The USA fractured into tiny statelets.

 

By 2250, the Dianetic People's Republic of California (no, you're not supposed to take this setting seriously) has been locked in wars off and on for the past decade with the Cascadian Republic (an amalgamation of Washington, Oregon, and a poorly-defined border running somewhere through Idaho and Nevada), as well as Deseret.  The Cascadian Republic has a smaller manufacturing base than the DPRC, but if their APFSDS spec is anything to go by, they have a slight technological lead.  Deseret is comparatively sparsely populated, but the difficult terrain and toughness of its Mormonhadeen fighters mean that it is not an easy opponent.

 

The DPRC has a roughly 1960s level of manufacturing technology, although their current arsenal is badly dated.  The goal of this competition is to design a new heavy tank for their forces.  Because a great deal of written material has survived from before 2029, you aren't designing a 1960s tank, per se.  You are designing a tank with 1960s levels of technology but with the benefit of hindsight.

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I have a few questions:
1.  Is a 360 degree turret required?
2.  Are tracks required?
3. What type of terrain is the vehicle expected to operate in? 
Marsh, swamp, snowy, rocky, hilly, forested, mountainous, many rivers? , many lakes?, frequent river crossings?  Urban fighting? Frequent use of tunnels? etc. 

4. What is the quality and capability of the welding industry? Does aluminum welds reach the same quality as steel welds? 

5. When requiring it to fit the average soldier at 1,7m, does that mean the 95th percentile of a population with a average height of 1,7m?

6. If manufacturing capability is present, can technology be "invented"? FCS, RCWS, autoloaders, ballistic computers, engine components etc, made from technology in other industries?
Example, manufacturing industries use pneumatic PID regulators,  a similar technology could be used for FCS?

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25 minutes ago, Xoon said:

I have a few questions:
1.  Is a 360 degree turret required?
2.  Are tracks required?
3. What type of terrain is the vehicle expected to operate in? 
Marsh, swamp, snowy, rocky, hilly, forested, mountainous, many rivers? , many lakes?, frequent river crossings?  Urban fighting? Frequent use of tunnels? etc. 

4. What is the quality and capability of the welding industry? Does aluminum welds reach the same quality as steel welds? 

5. When requiring it to fit the average soldier at 1,7m, does that mean the 95th percentile of a population with a average height of 1,7m?

6. If manufacturing capability is present, can technology be "invented"? FCS, RCWS, autoloaders, ballistic computers, engine components etc, made from technology in other industries?
Example, manufacturing industries use pneumatic PID regulators,  a similar technology could be used for FCS?

1. A 360 degree turret is not required, but the ability to engage targets within the extended frontal arc is.

2. Tracks are not required, but the ground pressure requirements are MMP and not NGP; good luck getting anywhere near them with wheels.

3. Any and all of the above, within reason. Hence the ground pressure requirement.

4. Aluminum 5083 is as weldable as RHA.

5. No; it means the average one. 95th percentile soldiers belong in infantry, not armor.

6. The idea is 1960s tech and current day knowledge. If you can get it to work convincingly, go ahead.

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7 minutes ago, DIADES said:

Respectfully, when does her Serene Highness require us to complete this glorious task?

 

Do not use female pronounes to refer to me. For I, Her Safe and Tolerant Majesty Queen Diane Feinstein the VIII,

 

9GtsAwR.jpg

 

shall only be referred to by female pronouns by members of the nobility, the holy ones who have made the necessary tithes to the One, Holy, Galactic, and Dianetic, Church of Scientology. You Pleb, may only use Use the Xer pronoun to talk about me.

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For clarification, any submissions must be modeled with some sort of 3D modeling program. Historically, the minimum requirement for this has been to use Google Sketchup, but in many cases submissions have been fully modeled in SolidWorks.

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3 hours ago, N-L-M said:

1. A 360 degree turret is not required, but the ability to engage targets within the extended frontal arc is.

So no Strv 103?

 

3 hours ago, N-L-M said:

2. Tracks are not required, but the ground pressure requirements are MMP and not NGP; good luck getting anywhere near them with wheels.

True, but its neat to have the option. 

 

3 hours ago, N-L-M said:

4. Aluminum 5083 is as weldable as RHA.

Aluminum is really hard to weld in my experience, compared to steel, so I was just worried about the weld quality. But I assume they are equal. 

 

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Jesus God, we are reaching new levels of autism and SJW mockery not previously thought possible with this competition

 

I will have to expand my whiskey budget if I wish to participate in this competition, as well as quit my full time job to focus on this

 

I'm just saying, 2 months of work for 50 capitalist pig scrip is a poor trade. Maybe an honorary title should be bestowed, as well.

 

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5 hours ago, Xoon said:

So no Strv 103?

 

True, but its neat to have the option. 

 

Aluminum is really hard to weld in my experience, compared to steel, so I was just worried about the weld quality. But I assume they are equal. 

 

1. Strv 103-alike is allowed if you can show an ability to engage targets in the extended frontal arc without a notable disadvantage compared to turreted alternatives.

2. The option is there if you can make it work.

3. Aluminum is more difficult to weld which makes it more expensive, but in terms of actual weld quality the DPRC can weld aluminum just as well as it can weld steel.

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To the Honorable Diane Feinstein VIII and other nobles related to this contest, 

 

I have questions about the metallurgy of DPRC. As my company, Song Heavy Machine Works, has only experience in large agriculture and multi-axle transport vehicles, along with the civilian grade materials used in them, we are in need of additional information pertaining to the questions I have given below, if that is acceptable for release. In regards to weapon and vehicle design expertise, we have contacted the ‘Mann Ltd’ corporation (Ms. Hillary Mann was kind enough to send several designers, as well as research, to assist our efforts), so information pertaining to those aspects does not need to be sent. My questions are as follows: 

 

1. Are there Uranium or Tantalum mines within our territories; and if so, what is the level of technology for refining those metals? 

 

2. Are these high hardness steels brittle or are they alloyed well? What kind of alloying materials would we have available for armor grade plates? 

 

3. Is face hardened armor available for use, or is the industry / processes not developed? 

 

I may send additional queries, but for now these are our biggest questions relating to the new heavy tank. Long live the DPRC, and long live the Feinsteins! 

 

Sincerely, 

 

Song Liu-Haack, CEO and Lead Designer of Song Heavy Machine Works. 

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34 minutes ago, Lord_James said:

...

1. Neither Uranium nor Tantalum reserves are available for tactical ground forces use.

2. HHA is sufficiently well-constructed that it will not shatter under standard ballistic impacts.

RHA is alloyed per the pre-cataclysm MIL-A-12560H. 

3. FH armor is available; the outer 20% or 10mm (whichever is less) functions as HHA and the rest as RHA. May be used for structural purposes, but fitting equipment to the hardened face becomes... interesting.

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      by Marie Lemarre
       
      July 23, 2239
       
      Texas is not the jewel of the United States as it once was, but in the 23rd Century it still remains a force to be reckoned with. The unquestioned source of Lone Free State power is its vast, soaring highways, which keep men and materiel flowing to where they are most needed. Trucks of every variety use these roads, but they are most critical as a national security asset. Would our borders be as safe as they are, would the productivity of the free Texas man be as great as it is, without the ability of the Texas Patrol to go from Amarillo to Corpus Christi in six hours? No! The lifeblood of the Texan state pumps over our soaring highways, and our highways protect that lifeblood all the same. Of all the former American member states, only Texas has maintained its highways, and it reaps the benefits.
       
       

      THE GROWING THREAT PAST THE BORDER
       
      The Lone Star

      by Hillum Dickens
       
      October 4th, 2242

      Our border is once again threatened! A new fanatical enemy has appeared in Rockies, threatening our settlers in Moriarty, Wagon Mound, and Springer. Twelve settlements have been raided in the past eight months, with ten more reporting sightings of the "Mormon Menace". Just last week in Springer, cowherds were attacked by men with face cloths, wielding rifles and riding in trucks. They threw crude incendiary devices and torched several buildings, including a Post Office. The local Border Guard was alerted, but by the time they could ride over the men were gone, and 1200 head of cattle with them. These attacks cannot go-
       
       
       
      SHOCK AND AWE IN RATON

      The Lone Star

      by Hillum Dickens
       
      May 30th, 2243
       
      The Sante Fe militias are defeated! Mormon forces, better equipped than any we have seen before, have crushed the Lone Free State militias ordered to reinforce Raton by Provisional Governor O'Connor. Initial attacks on the border town were met with local response, but results were inconclusive as the Mormons led the Sheriff's deputies on long chases through the mountains. Exhausted and drained, they returned only to find buildings burned, farms destroyed, and livestock and materiel stolen out from under them. Immediately upon receiving the news, Governor O'Connor ordered the Texas Free State Rangers to assemble and deputize across the state, and an immediate action by the Sante Fe mayor to mobilize the militias in the area and march on Raton in response. Once they arrived, they found not forces of elusive mountain men, but a war machine of hundreds of men armed with heavy weapons, and tens of powerful tracked armored trucks with high caliber cannons. The Santa Fe Command, convinced of its numerical superiority, attacked the Mormon forces with haste. The Mormons responded by firing salvos of powerful new recoilless weapons that turned armored trucks into scrap, and using their own, better armed and armored trucks to mop up defenders. The result was a massacre.
       


      INTELLIGENCE DOSSIER: CALIFORNIAN DEVELOPMENTS IN MILITARY TECHNOLOGY

      CONFIDENTIAL - CLASSIFICATION A

      TEXAS LONE FREE STATE RANGERS
       
      PUBLISHED: August 9th, 2244

      RECEIVED: August 18th, 2244

      DURING THE SECOND EXPEDITION INTO THE GONZALEZ CLAIM, INDEPENDENT RANGER DETACHMENTS WERE DISPATCHED TO LEARN AS MUCH AS POSSIBLE ABOUT TEXAS'S NEAREST NEIGHBOR AND THEIR MILITARY CAPABILITIES. WHAT WAS LEARNED IN THOSE SORTIES IS OF THE HIGHEST NOTE AND PRIORITY TO THE SECURITY OF THE LONE FREE STATE. CALIFORNIAN WEAPONS ARE ADVANCED FAR BEYOND OUR EXPECTATIONS, AND INCLUDE TRACKED, ARMORED TRUCKS ("TANKS") WITH POWERFUL GUNS COMPARABLE TO LIGHT ARTILLERY, AND ARMOR UP TO THREE INCHES THICK. THEIR AIR FORCES, THOUGH SOMEWHAT LESS TECHNICALLY SOPHISTICATED THAN OURS, ARE FAR MORE NUMEROUS AND CONTAIN A WIDER VARIETY OF AIR ASSETS, INCLUDING HIGH SPEED TURBOJET AND PISTON POWERED AIRCRAFT DESIGNED SPECIFICALLY TO COUNTER OTHER AIR ASSETS. THESE WOULD POSE AN EXTREME THREAT TO FREE STATE AIR GUARD UNITS, WHICH INCLUDE ONLY LIGHT AIRCRAFT INTENDED TO COUNTER GROUND TARGETS. THEY POSSESS A STANDING ARMY IN NUMBER EXCEEDING EVEN ALL MILITIA AND GOVERNMENT FORCES IN THE LONE FREE STATE BY MANY TIMES. THIS ARMY IS ALSO WELL EQUIPPED WITH A VARIETY OF WEAPONS CAPABLE OF PENETRATING VIRTUALLY ALL LONE FREE STATE GROUND ASSETS, SUCH AS THE G-12 ARMORED SCOUT TRUCK-
       


      GUNS OF TEXAS
       
      Encyclopedia of American Small Arms, 6th Edition

      Vienna Publishing, 2241

      Despite having no formal military, the Lone Free State of Texas has an extensive arsenal of sophisticated small arms and artillery. Local militias are provided a stipend with which they can purchase arms from the government, up to and including recoilless rifles of 105mm bore according to reports. It is therefore worth examining the weapons of the Lone Free State.

      PISTOLS
       
      The primary pistol of the Lone Free State is the G-36. This recoil operated semiautomatic pistol holds 15 rounds and has a barrel length of 102mm. Bore diameter is 10.2mm and it fires a 10x22mm round that was developed in the pre-war United States. Standard ammunition is semi-jacketed with a steel core, with both penetrating and expanding characteristics. The slide and barrel are both hammer-forged steel, while the frame is steel with polymer panels. Unusually, the gun is fired with a cowboy-esque hammer, and not a striker as has been ubiquitous for nearly two centuries. This pistol is commonly seen in Texas, as it is the best weapon available for purchase using government funds for local militias and landowners. At the same time, many local shops turn out boutique pistols of numerous varieties, all of which are broadly similar in characteristics to the G-36. In most cases, like the A1 version of the G-36, they provide a slot on top of the slide for a rugged reflector sight, which is commonly attached.

      RIFLES
       
      The most common rifle is the G-15. This is a 10-shot, manually operated rifle with provision for an optical sight, normally a robust 1-8x being attached. Caliber is the relatively antiquated 7.62x51mm. The feed mechanism is a sturdy steel box magazine which sits below the action of the rifle. Unlike most manually operated rifles of the Americas, the G-15 is lever actuated, not operated via a bolt handle. Texan shooters feel this gives them a superior rate of fire without compromising range, although it must be said this compromises prone and concealed fire capability. The G-15 is being phased out in favor of the newer and semiautomatic G-38.

      MACHINE PISTOLS
       
      Pistol caliber automatic shoulder weapons are uncommon in Texas, but the numerous police and paramilitary forces of the state occasionally use "sub machine guns" as they call them. Virtually the only model available is the G-32, which fires the same 10x22mm round as the G-36 pistol. It is a select-fire, closed bolt weapon using an unusual gas operated mechanism. Capacity is 35 rounds. Reportedly, it is very expensive and usually requires local funds in addition to the stipend to afford. Occasionally these weapons find their way into criminal hands, and they have also been seen in the possession of settler citizens who have legitimately purchased them.

      STURMGEWEHRS
       
      Offsetting the lack of machine pistols somewhat, the Texas government has aggressively pursued the sturmgewehr concept as part of their arms program. The latest of many Texan weapons in this class is the G-42, a gas operated select-fire weapon with a capacity of 28 rounds. Caliber is 6.86x40mm, and muzzle velocity is over 900 m/s. This rifle has been made relatively inexpensive due to a large production rate and widespread adoption by the settler population, who use it primarily for homestead defense and hunting. Like its manually-operated predecessor, it is compatible with optics, and usually is found equipped with the same 1-8 optical sight. Numerous other weapons, including pre-war designs both reclaimed and newly manufactured, are also used by various Texas citizens and militias.

      MACHINE GUNS
       
      Although there is not much need for belt fed machine guns in cattle herding (the primary trade of the citizens of the Texas countryside) the Texas government has procured significant numbers for border control and to combat bandits. Most of these are contained in armories at the various outposts and post offices that run along the country's substantial highway system, but some are held privately. Despite most belt feds worldwide being based on designs from over 200 years ago, many of those in the Lone Free State are original designs dating to within the last 50 years. This is exemplified by the primary Texan belt fed machine gun, the G-17A4, which fires an advanced high pressure steel cased 7.62mm round with either an open or a closed bolt operation. Most remarkable is its weight, which is just over 8 kilograms. Stocked infantry variants, as well as more numerous fixed/vehicle stockless variants both exist. Texan heavy machine guns still fire the 322-year-old 12.7x99mm round, albeit in a greatly augmented form. Like the smaller 7.62mm machine gun round, it uses a steel case and relatively high chamber pressure of 4800 BAR, which results in a 3,150 ft/s muzzle velocity with its 750 grain armor piercing explosive projectile. The principal machine gun in this caliber is the G-19A2 which is gas operated and utilizes a soft recoil system and has a rate of fire of approximately 500 rounds per minute. These machine guns are usually seen mounted to government G-12 4x4 armored cars.
       
      AUTOCANNONS
       
      Only in the past 15 years as the Lone Free State invested heavily in autocannons. For most of its post-war history, there were simply not enough targets that required automatic cannons, with very few armored ground vehicles and aircraft being operated by non-state actors in the Texas region until recently, to necessitate development of new weapons. However, as the Lone Free State has expanded, it has begun to encounter better organized and armed natives, necessitating the development of a standardized suite of new large-caliber autocannons. Chief among these is the electric G-37 firing a 30.5x114mmB round with a muzzle velocity of about 820 m/s and a rate of fire of about 550 rounds per minute. Interestingly, this cannon is capable of being mounted on any of the same pintle mounts as the G-19A2, giving light Texan units potentially very good firepower.
       
      RECOILLESS ARTILLERY
       
      Despite not seeing the need for autocannons for many years, the Lone Free State has liberally used the recoilless artillery concept, with most local militias possessing some stockpile of recoilless weapons. Numerous variants of recoilless rifle exist in three primary calibers, 57.2x305mmR, 76.2x406mmR, and 105.4x610mmR. These recoilless cannons are commonly mounted to the light helicopters used by various Texan government entities.
       

       
      A Texan G-18A7 helicopter waits for routine maintenance outside the hangar. These helicopters are the primary aerial support asset across the Lone Free State of Texas. (Reader's note: This picture shows two quite shagged out Kiowas, but the G-18 is a unique indigenous design to the LFSoT. The Kiowa is only used here to represent the kind of helicopter that the G-18 would be.)
       
       

       
      Supplementary Out of Canon Information:
       
       
      I.     Technology available:
      a.      Armor:
      The following armor materials are in full production and available for use. Use of a non-standard armor material requires permission from a judge.
      Structural materials:
                                                                    i.     RHA/CHA
      Basic steel armor, 360 BHN. The reference for all weapon penetration figures, good impact properties, fully weldable. Available in thicknesses up to 4 inches (RHA).
      Density- 0.28 lb/in^3.
                                                                   ii.     Aluminum 5083
      More expensive to work with than RHA per weight, middling impact properties, low thermal limits. Excellent stiffness.
       Fully weldable. Available in thicknesses up to 4 inches.
      Mass efficiency vs RHA of 1 vs CE, 0.9 vs KE.
      Thickness efficiency vs RHA of 0.33 vs CE, 0.3 vs KE.
      Density- 0.1 lb/in^3 (approx. 1/3 of steel).
      For structural integrity, the following guidelines are recommended:
      For heavy vehicles (30-40 tons), not less than 1 in RHA/1.75 in Aluminum base structure
      For medium-light vehicles (<25 tons), not less than 0.5 in RHA/1 in Aluminum base structure
      Intermediate values for intermediate vehicles may be chosen as seen fit.
      Non-structural passive materials:
                                                                  iii.     HHA
      Steel, approximately 500 BHN through-hardened. Approximately 1.5x as effective as RHA against KE and HEAT on a per-weight basis. Not weldable, middling shock properties. Available in thicknesses up to 1 inch.
      Density- 0.28 lb/in^3
                                                                  iv.     Fuel
      Mass efficiency vs RHA of 1.3 vs CE, 1 vs KE.
      Thickness efficiency vs RHA of 0.14 vs CE, 0.1 vs KE.
      Density-0.03 lb/in^3.
                                                                v.     Assorted stowage/systems
      Mass efficiency vs RHA- 1 vs CE, 0.8 vs KE.
                                                               vi.     Spaced armor
      Requires a face of at least 1 inch LOS vs CE, and at least 0.75 caliber LOS vs fullbore AP KE.
      Reduces penetration by a factor of 1.1 vs CE or 1.05 vs KE for every 4 inchair gap.
      Spaced armor rules only apply after any standoff surplus to the requirements of a reactive cassette.
      Reactive armor materials:
                                                                  vii.     ERA
      A sandwich of 0.125in/0.125in/0.125in steel-explodium-steel.
      Requires mounting brackets of approximately 10-30% cassette weight.
      Must be spaced at least 2 sandwich thicknesses away from any other armor elements to allow full functionality. 81% coverage (edge effects).
                                                                  viii.     NERA
      A sandwich of 0.25in steel/0.25in rubber/0.25in steel.
      Requires mounting brackets of approximately 10-30% cassette weight.
      Must be spaced at least 1 sandwich thickness away from any other armor elements to allow full functionality. 95% coverage.
      The details of how to calculate armor effectiveness will be detailed in Appendix 1.
      b.      Firepower
                                                                    i.     Bofors 57mm - 85,000 PSI PMax/70,000 PSI Peak Operating Pressure, high quality steel cases, recoil mechanisms and so on are at an equivalent level to that of the USA in the year 1960.
                                                                   ii.     No APFSDS currently in use, experimental weapons only - Spindle sabots or bourelleted sabots, see for example the Soviet BM-20 100mm APFSDS.
                                                                  iii.     Tungsten is available for tooling but not formable into long rod penetrators.
                                                                  iv.     Texan shaped charge technology - 4 CD penetration for high-pressure resistant HEAT, 5 CD for low pressure/ precision formed HEAT.
                                                                   v.     The subsidy-approved GPMG for the Lone Free State of Texas has the same form factor as the M240, but with switchable feed direction.. The standard HMG has the same form factor as the Kord, but with switchable feed direction.
      c.       Mobility
                                                                    i.     Engines tech level:
      1.      MB 838 (830 HP)
      2.      AVDS-1790-5A (908 HP)
      3.      Kharkov 5TD (600 HP)
      4.    Detroit Diesel 8V92 (400 HP)
      5.    Detroit Diesel 6V53 (200 HP)
                                                                   ii.     Power density should be based on the above engines. Dimensions are available online, pay attention to cooling of 1 and 3 (water cooled).
                                                                  iii.     Power output broadly scales with volume, as does weight. Trying to extract more power from the same size may come at the cost of reliability (and in the case of the 5TD, it isn’t all that reliable in the first place).
                                                                  iv.     There is nothing inherently wrong with opposed piston or 2-stroke engines if done right.
      d.      Electronics
                                                                    i.     LRFs- unavailable
                                                                   ii.     Thermals-unavailable
                                                                  iii.     I^2- Gen 2 maximum
                                                                  vi.     Texas cannot mass produce microprocessors or integrated circuits
                                                                 vii.    Really early transistors only (e.g., transistor radio)
                                                                viii.    While it is known states exist with more advanced computer technology, the import of such systems are barred by the east coast states who do not approve of their use by militaristic entities.
       
      Armor calculation appendix.
    • By Sturgeon
      If you exclusively reside in Mechanized Warfare, as many of you do, you might have missed that SH is holding its quasi-annual design competition, which is for an armored car to be developed for the future post-apocalyptic Lone Free State of Texas, circa 2245. Check out the thread here.
    • By Proyas
      Hi guys,
       
      Does anyone know of any military studies that analyzed the reload speeds for different tanks? The question occurred to me when I watched this video tour of the T-55's interior: 
       
      https://youtu.be/TEDhB9evPvw
       
      At the 10:00 mark, Mr. Moran demonstrates how the loader would put a shell into the tank's cannon, and the effects of the turret's small size and of the loader's awkward seating make it clear that the process would be slow. My question is: how slow? 
       
      Side question: Am I right to assume that storing the tank shells all over the inside of the turret like that is an inherent design flaw of the T-55 that makes it inferior in that regard to modern tanks? 
       
      Thanks in advance. 
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