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N-L-M

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  1. Funny
    N-L-M got a reaction from DIADES in Competition: Californium 2250   
    Because the DPRC's high end AlO production is allocated to aircraft, LAV and personal body armor and not for tanks; the sheer quantity needed for large AFV production exceeds reasonable production capacities.
    At the same time, performance is not expected to reasonably exceed that of fused silica against the reference threats.
    Fused silica is in effect just very pure glass, easy to mass-produce. It has also seen use in armor since the early 1950s; it is assessed as offering similar performance at significantly lower costs vs the existing threats compared to more esoteric solutions such as granite, which is therefore disqualified on cost grounds.
     
    Such Suppressive Personship is the sign of a Reactive Mind. Hatethink like this may get your Operating Thetan clearance revoked and you audited for sedition.
     
    On a more serious note, you're invited to, y'know, actually participate before complaining about the rules.
  2. Tank You
    N-L-M got a reaction from That_Baka in Competition: Californium 2250   
    NERA is reactive not passive.
    NERA plates holed by the precursor do not stop the primary.
  3. Funny
    N-L-M got a reaction from Zyklon in Competition: Californium 2250   
    Because the DPRC's high end AlO production is allocated to aircraft, LAV and personal body armor and not for tanks; the sheer quantity needed for large AFV production exceeds reasonable production capacities.
    At the same time, performance is not expected to reasonably exceed that of fused silica against the reference threats.
    Fused silica is in effect just very pure glass, easy to mass-produce. It has also seen use in armor since the early 1950s; it is assessed as offering similar performance at significantly lower costs vs the existing threats compared to more esoteric solutions such as granite, which is therefore disqualified on cost grounds.
     
    Such Suppressive Personship is the sign of a Reactive Mind. Hatethink like this may get your Operating Thetan clearance revoked and you audited for sedition.
     
    On a more serious note, you're invited to, y'know, actually participate before complaining about the rules.
  4. Funny
    N-L-M reacted to Collimatrix in Competition: Californium 2250   
    You're right, my bad.  But with NLM's clarification about only the steel part of the reactive armor array contributing to the K2, then it's actually only about 103mm.
     
    As soon as we know the formula for K1 we can figure out what the highest ratio of cosine(theta)/K1 is.  That should give us the best efficiency.
     
    EDIT:

    for instance, the ratio of the secant of 80 degrees over the secant of 70 degrees is 1.96.  Eyeballing the K1 chart, the effect at those slopes is about 3.5 and 2 respectively.  3.5/2 is only 1.75, so the increase in the effectiveness of the array is not offset by the increase in areal density.
     
     
    EDIT EDIT:  That's the reciprocal of the cosine of the Greek letter theta, not the act of attempting to take out a loan from the Dianetic People's Bank by having your thetan co-sign.
  5. Funny
    N-L-M reacted to Collimatrix in Competition: Californium 2250   
    I can do two better:

    https://patents.google.com/patent/US35600A/en
     
    https://patents.google.com/patent/US3216423A/en
  6. Funny
    N-L-M got a reaction from That_Baka in Competition: Californium 2250   
    Because the DPRC's high end AlO production is allocated to aircraft, LAV and personal body armor and not for tanks; the sheer quantity needed for large AFV production exceeds reasonable production capacities.
    At the same time, performance is not expected to reasonably exceed that of fused silica against the reference threats.
    Fused silica is in effect just very pure glass, easy to mass-produce. It has also seen use in armor since the early 1950s; it is assessed as offering similar performance at significantly lower costs vs the existing threats compared to more esoteric solutions such as granite, which is therefore disqualified on cost grounds.
     
    Such Suppressive Personship is the sign of a Reactive Mind. Hatethink like this may get your Operating Thetan clearance revoked and you audited for sedition.
     
    On a more serious note, you're invited to, y'know, actually participate before complaining about the rules.
  7. Funny
    N-L-M got a reaction from Collimatrix in Competition: Californium 2250   
    Because the DPRC's high end AlO production is allocated to aircraft, LAV and personal body armor and not for tanks; the sheer quantity needed for large AFV production exceeds reasonable production capacities.
    At the same time, performance is not expected to reasonably exceed that of fused silica against the reference threats.
    Fused silica is in effect just very pure glass, easy to mass-produce. It has also seen use in armor since the early 1950s; it is assessed as offering similar performance at significantly lower costs vs the existing threats compared to more esoteric solutions such as granite, which is therefore disqualified on cost grounds.
     
    Such Suppressive Personship is the sign of a Reactive Mind. Hatethink like this may get your Operating Thetan clearance revoked and you audited for sedition.
     
    On a more serious note, you're invited to, y'know, actually participate before complaining about the rules.
  8. Tank You
    N-L-M got a reaction from Lord_James in Competition: Californium 2250   
    ADDENDUM 1
    Armor details:
    1. Fixes.
    A. ERA spacing: results from the labs show that ERA need only have 2 sandwich thicknesses away from other elements and not 3 as previously required.
    B. Spaced armor: Spaced armor rules apply to the main warhead in a tandem immediately, as the precursor slug counts as a sufficient "face". Base penetration is not however affected.
    Light threats (155mm HE frag, SLAP) experience spaced armor effects from 10mm face.
    2. Clarifications.
    A. In reactives, the K2 factor applies only to the steel LOS in the sandwich. The rubber or explodium do not affect penetration other than by giving the dynamic effect.
    B. The spacing between reactive elements is measured normal to the face.
    C. To get the ERA/NERA effect, the penetration LOS must enter the front face and exit the back face of the sandwich. Edge and corner hits count only as the steel LOS value.
    D. Penetration of light threats:
    SLAP-
    30mm at 750m
    35mm at 500m
    40mm at 250m
    45mm at 50m
    155mm HE-
    40mm at 15m
    45mm at 10m
    50mm at 5m
    E. Light threats do not experience dynamic effects of RA (K1 but do experience LOS feeding (K2).
    F. The light threats experience spaced armor effects from 10mm LOS steel.
    G. The weight of brackets for reactive armor is selectable, where 10% is light and flimsy and 30% is solid.
    This affects multi-hit ability in a non-quantified way.
    H. The density of rubber and explodium fills of RA is 1.5g/cm^3.
    I. Any RA element hit by a precursor takes no part in the action of the main warhead; in passive elements, only the depth not involved in the penetration of the precursor takes part in the action of the primary.
    J. DPICM- 40mm HEAT with 4 CD =160mm CE.
    3. Additions.
    A. Face hardened armor.
    Hardened to a depth of 20% or 10mm, whichever is less. Hard face acts like HHA, including making it difficult to attach things to.
    B. Equations for K1 curves:
    Will be posted soon, check back in 12 hours from the time of posting.
     
    Other spec changes.
    A. Norman killing ranges reduced to 1.5/2.25/3km with a 50% Phit, where rounds that have a lesser Phit are grouped until they do. (For example, 0.3 Phit has a combined probability of at least one hitting of (1-0.7^2)=0.51, so rounds are counted as half a stowed kill).
    B. DPRC APFSDS may be of Maraging steel of up to 400 BHN hardness.
     
    Changes may take up to 12 hours to be updated in the OP spec.
  9. Tank You
    N-L-M got a reaction from Lord_James in Competition: Californium 2250   
    The Cascadian Propaganda Service claims any Cascadian weapons in the hands of the Mormonhideen fell of the back of a truck during one of their long range recon patrols into Deseret territory.
     
    I should clarify- the k2 rule applies only to the steel LOS in the sandwich. Also I'm not sure how you get to 36mm just from the k2 rule when the sandwich is 3/3/3.
     
    There will be a post within the next 24h with a few detail changes to the armor specs and the k1 equations.
    Yes.
    How do you propose to have a vehicle without a hull?
    No.
  10. Tank You
    N-L-M got a reaction from holoween in Competition: Californium 2250   
    NERA is reactive not passive.
    NERA plates holed by the precursor do not stop the primary.
  11. Tank You
    N-L-M got a reaction from Toxn in Competition: Californium 2250   
    ADDENDUM 1
    Armor details:
    1. Fixes.
    A. ERA spacing: results from the labs show that ERA need only have 2 sandwich thicknesses away from other elements and not 3 as previously required.
    B. Spaced armor: Spaced armor rules apply to the main warhead in a tandem immediately, as the precursor slug counts as a sufficient "face". Base penetration is not however affected.
    Light threats (155mm HE frag, SLAP) experience spaced armor effects from 10mm face.
    2. Clarifications.
    A. In reactives, the K2 factor applies only to the steel LOS in the sandwich. The rubber or explodium do not affect penetration other than by giving the dynamic effect.
    B. The spacing between reactive elements is measured normal to the face.
    C. To get the ERA/NERA effect, the penetration LOS must enter the front face and exit the back face of the sandwich. Edge and corner hits count only as the steel LOS value.
    D. Penetration of light threats:
    SLAP-
    30mm at 750m
    35mm at 500m
    40mm at 250m
    45mm at 50m
    155mm HE-
    40mm at 15m
    45mm at 10m
    50mm at 5m
    E. Light threats do not experience dynamic effects of RA (K1 but do experience LOS feeding (K2).
    F. The light threats experience spaced armor effects from 10mm LOS steel.
    G. The weight of brackets for reactive armor is selectable, where 10% is light and flimsy and 30% is solid.
    This affects multi-hit ability in a non-quantified way.
    H. The density of rubber and explodium fills of RA is 1.5g/cm^3.
    I. Any RA element hit by a precursor takes no part in the action of the main warhead; in passive elements, only the depth not involved in the penetration of the precursor takes part in the action of the primary.
    J. DPICM- 40mm HEAT with 4 CD =160mm CE.
    3. Additions.
    A. Face hardened armor.
    Hardened to a depth of 20% or 10mm, whichever is less. Hard face acts like HHA, including making it difficult to attach things to.
    B. Equations for K1 curves:
    Will be posted soon, check back in 12 hours from the time of posting.
     
    Other spec changes.
    A. Norman killing ranges reduced to 1.5/2.25/3km with a 50% Phit, where rounds that have a lesser Phit are grouped until they do. (For example, 0.3 Phit has a combined probability of at least one hitting of (1-0.7^2)=0.51, so rounds are counted as half a stowed kill).
    B. DPRC APFSDS may be of Maraging steel of up to 400 BHN hardness.
     
    Changes may take up to 12 hours to be updated in the OP spec.
  12. Funny
    N-L-M reacted to Toxn in Competition: Californium 2250   
    The perfect Californian tank is impenetrable to all attacks, but occasionally detonates when left in the sun for too long...
  13. Funny
    N-L-M reacted to Collimatrix in Competition: Californium 2250   
    I would just like to say that I am deeply offended by the fact that the ATGM arcs are wider in the LIC spec than the HIC spec.  Are you implying that the Cascadian government would supply Deseret with ATGMs?  Are you saying that the government of a developed, democratic republic would consider supplying advanced guided missile systems to a bunch of religious zealot insurgents just so screw over an opposing state?
     
    That strategy would obviously backfire.  Who would be that stupid?
  14. Tank You
    N-L-M reacted to Scav in The Leopard 2 Thread   
    Interesting points:
    Mantlet weighs 640kg
    Barrel + breech weigh 1905kg but total assembly without mantlet is 3015kg, so 1110kg for cradle, recoil system, recoil guard, etc.
    They tested APFSDS with L/Ds in excess of 30.
    Sales brochure (?) from September 1982.
  15. Tank You
    N-L-M got a reaction from DIADES in Competition: Californium 2250   
    Somewhat optimisitcally modified from the numbers in the TRADOC bulletin for the T-62.
  16. Funny
    N-L-M reacted to Collimatrix in Competition: Californium 2250   
    OK, some initial goofing with the armor system:
     
     
    Because Scientologists can't weld worth a damn, they are really short on options for armor with good thickness efficiency.  Now, granted, Sea Org-spec HHA is pretty great fucking stuff, and it's noticeably better than actual 1960s HHA.  It's comparable to top of the line 2019 HHA, actually.  But they can't weld it, they can't make it thicker than 1.7 inches, and they can't laminate or explosively bond it to make double or triple hardness steel.
     
    This means that their armor arrays are going to be þikcqqqq.
     

     
     
  17. Funny
    N-L-M reacted to LoooSeR in US Politics Thread: Year 2 of 1000 of the TrumpenReich   
    YOu dOn'T UnDERsTand RusSiAnS ARe SmARteR ThaN ThAt
    TheY HackED MuElLEr WiTh RuSSiaN HoOKeRs By ORdeR oF PuTIn!
     
    Meanwhile in the real world:
    https://www.theguardian.com/world/2018/oct/04/visual-guide-how-dutch-intelligence-thwarted-a-russian-hacking-operation
    Russians can't hack WiFi without getting busted.
  18. Tank You
    N-L-M got a reaction from Lord_James in Competition: Californium 2250   
    K1 is the dynamic portion that breaks up the penetrator, reducing its overall penetration by a certain factor, and is modelled as being angle-dependent.
    K2 is the erosion of the penetrator by feeding material into its path, and is modelled as being constant.
  19. Funny
    N-L-M reacted to T___A in Competition: Californium 2250   
    Did you just refer to worms as a lesser lifeforms than us? That is is very Annelidphobic of you. Please use men as objects of your derision
  20. Metal
    N-L-M got a reaction from Zyklon in Competition: Californium 2250   
    Restricted: for Operating Thetan Eyes Only

    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!
  21. Tank You
    N-L-M got a reaction from Lord_James in Competition: Californium 2250   
    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.
  22. Metal
    N-L-M got a reaction from Lord_James in Competition: Californium 2250   
    Restricted: for Operating Thetan Eyes Only

    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!
  23. Funny
    N-L-M reacted to T___A in Competition: Californium 2250   
    Do not use female pronounes to refer to me. For I, Her Safe and Tolerant Majesty Queen Diane Feinstein the VIII,
     

     
    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.
  24. Tank You
    N-L-M got a reaction from DIADES in Competition: Californium 2250   
    Restricted: for Operating Thetan Eyes Only

    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!
  25. Tank You
    N-L-M got a reaction from LoooSeR in Competition: Californium 2250   
    Restricted: for Operating Thetan Eyes Only

    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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