Difference between revisions of "Autocannon/20"
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| <ref name=TRO3039-159/><ref name=TRO3025-110/><ref name=TRO3025R-104/><ref name=TROSWp154/> | | <ref name=TRO3039-159/><ref name=TRO3025-110/><ref name=TRO3025R-104/><ref name=TROSWp154/> | ||
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| [[St. Ives]] | | [[St. Ives]] | ||
| [[HildCo Interplanetary]] | | [[HildCo Interplanetary]] | ||
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| <ref name=TRO3025p111>''Technical Readout: 3025'', p. 111</ref><ref name=TRO3025p104>''Technical Readout: 3025 Revised'', p. 104</ref> | | <ref name=TRO3025p111>''Technical Readout: 3025'', p. 111</ref><ref name=TRO3025p104>''Technical Readout: 3025 Revised'', p. 104</ref> | ||
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Revision as of 19:37, 4 February 2024
Autocannon/20 | |
Production information | |
Type | ballistic (direct fire) |
Tech Base | Inner Sphere |
Year Availability | 2490 (LC)[1] |
Technical specifications | |
Heat | 7[2] |
Damage | 20[2] |
Minimum Range | N/A |
Short Range | 1-3[2] |
Medium Range | 4-6[2] |
Long Range | 7-9[2] |
Tons | 14[2] |
Critical Slots | 10 |
Ammo Per Ton | 5[2] |
Cost (unloaded) | 300,000 C-bills |
Ammo Cost (per ton) | 10,000 C-bills |
BV (1.0) | 178 |
BV (2.0) | 178[3] 22 (Ammo)[3] |
Contents
- 1 Description
- 2 Ammunition
- 3 Models
- 3.1 Armstrong
- 3.2 ChemJet Gun 185mm
- 3.3 Crusher SH Cannon
- 3.4 Deathgiver
- 3.5 Defiance Killer Type T
- 3.6 Defiance 'Mech Hunter
- 3.7 Imperator-D
- 3.8 Imperator Zeta-A
- 3.9 Kali Yama Big Bore
- 3.10 Luxor Devastator-20
- 3.11 Luxor Heavy
- 3.12 Mydron A
- 3.13 Pontiac 100
- 3.14 RNG Ranger
- 3.15 Scarborough Original 20
- 3.16 Tomodzuru
- 3.17 Zeus-36, Mark III
- 3.18 Zeus-75 Mark IX
- 4 See Also
- 5 Notes
- 6 References
- 7 Bibliography
Description
The autocannon/20 was a direct-fire ballistic weapon, firing HEAP (High-Explosive Armor-Piercing) rounds at targets either singly or in bursts.
Different manufacturers and models of autocannons had different calibers (25 mm–203 mm) and rates of fire. Due to this, autocannons were grouped into generic "classes" of similar common damage ratings, with autocannon/20s doing massive damage while having very short range.[2]
This autocannon class could decapitate any 'Mech with one good hit to the head, regardless of the weight class, as that location could not mount little more than a ton's worth of standard armor. The AC/20 was capable of ripping nearly a ton and a quarter of armor off a 'Mech in any given volley (or shot, based on the model). This was enough damage to take down even the heaviest of 'Mechs, if aimed well. Only hardened armor or ballistic-reinforced armor could save a MechWarrior from a hit from this class of cannon to the head.
As an example of the rating system, the Crusher Super Heavy Cannon was a 150 mm weapon firing a ten-round cassette in a ten-second period, while the ChemJet Gun was a 185 mm weapon firing a four-round cassette in the same period. As both weapons were capable of firing 200 kilograms of ammunition in a 10-second period, at an effective range of just under 300 meters, they were both classified as autocannon/20s.[4]
Ammunition
A standard AC/20 could fire multiple types of ammunition, most of which were developed by the Federated Commonwealth in order to make their large supply of standard autocannon more useful in the age of ultra and LB-X autocannon.[5]
Models
The autocannon/20 was manufactured on the following planets:
Armstrong
Manufactured on | Manufactured by | Typically used in | References |
Bryant | HartfordCo Industries | Von Luckner | [6] |
ChemJet Gun 185mm
The titanic 185 mm ChemJet Gun used a popular propellant system that mixed two chemicals in suspension, to propel its four-round bursts from the barrel. This produced an enormous amount of heat, to the point that, on the Mk I model of the Demolisher tank, the crews had to wear special coolant suits; the later Mk II version solved this problem by channeling most of the ejection gases through the barrels.[7][4]
Manufactured on | Manufactured by | Typically used in | References |
Betelgeuse | Aldis Industries | Demolisher | [7] |
New Samarkand | New Samarkand Metals | Demolisher | [7] |
Terra | Aldis Industries | Demolisher | [7] |
Crusher SH Cannon
Mounted on the Quikscell Hetzer combat vehicle, this weapon fired shells in the 150 mm range in ten-shot bursts.[8][9][4]
Manufactured on | Manufactured by | Typically used in | References |
Indicass | Ceres Metals Industries | Hetzer | [10] |
Kalidasa, Layover | Quikscell Company | Hetzer | [11] |
Alshain | Quikscell Company | Hetzer | [12] |
Deathgiver
The Deathgiver was known to fire 12 cm (120 mm) rounds.[13]
Manufactured on | Manufactured by | Typically used in | References |
Mars, Northwind | Cosara Weaponries | King Crab | [14] |
Defiance Killer Type T
Manufactured on | Manufactured by | Typically used in | References |
Hesperus II | Defiance Industries | Rommel | [15] |
Terra | Mitchell Vehicles | Shootist | [16] |
Defiance 'Mech Hunter
Manufactured on | Manufactured by | Typically used in | References |
Hesperus II | Defiance Industries | Atlas | [17] |
Al Na'ir | Yori 'Mech Works | Atlas | [17] |
Quentin | Independence Weaponry | Atlas | [17] |
Hesperus II | Defiance Industries | Rommel | [18] |
Imperator-D
Manufactured on | Manufactured by | Typically used in | References |
Mars Northwind | Cosara Weaponries | King Crab | [19] |
Imperator Zeta-A
Manufactured on | Manufactured by | Typically used in | References |
Atreus | Imperator Automatic Weaponry | Riever | [20] |
Kali Yama Big Bore
The Kali Yama Big Bore was an autocannon/20 model manufactured in the Free Worlds League and exported to the Capellan Confederation.
Manufactured on | Manufactured by | Typically used in | References |
Kalidasa | Kali Yama Weapons Industries Incorporated | Hunchback, Thunder | [21][22][23] |
Luxor Devastator-20
Examples of the 120 mm[24] Luxor Devastator-20 gained a reputation being extremely prone to jamming on the early test models of the AXM-1N Axman; the designers ultimately came up with an alternate LRM-15-armed AXM-2N variant.[25][26][27]
Manufactured on | Manufactured by | Typically used in | References |
New Syrtis | Johnston Industries | Axman | [25][28] |
Furillo | Defiance Industries | Axman | [29] |
Panpour | Jalastar Aerospace | Typhoon | [30] |
Luxor Heavy
Manufactured on | Manufactured by | Typically used in | References |
Sarna St. Ives | Tengo Aerospace | Lightning | [31] |
Texlos | HildCo | Lightning | [31] |
Tharkad | Lockheed/CBM | Lightning | [31] |
Ramora | United Outworlders Corporation | Lightning | [31] |
Mydron A
Manufactured on | Manufactured by | Typically used in | References |
Bithinia | Bithinian Ballistics | UrbanMech Trashcan | [32] |
Gulkana | Yeffters Weapons Factory | Lightning | [33] |
Pontiac 100
The Pontiac 100 was famously known for its massive firepower, but some models occasionally displayed ammunition feed problems when mounted to the Victor BattleMech.[34][35][36][37]
Manufactured on | Manufactured by | Typically used in | References |
Sterope | Sterope Defense Industries | Victor | [34][35][36][37] |
St. Ives | HildCo Interplanetary | Victor | [38][39] |
RNG Ranger
Manufactured on | Manufactured by | Typically used in | References |
Tharkad | Bauer Enterprises | Rapier | [40] |
Scarborough Original 20
Originally developed by Scarborough Limited, though the Scarborough Original 20 autocannon did experience some initial developmental problems, the resulting weapon was equivalent to 200 mm autocannons produced by other companies in the massive amount of damage it inflicted.[41][42]
Manufactured on | Manufactured by | Typically used in | References |
Al Na'ir | Scarborough Manufacturers | Saladin | [43] |
Tomodzuru
The Tomodzuru-series has a massive 200 mm barrel.[44]
Manufactured on | Manufactured by | Typically used in | References |
Unknown | Komiyaba/Nissan General Industries | Hunchback | [45][46] |
Capella | Mujika Aerospace Technologies | Transit | [47] |
Zeus-36, Mark III
Manufactured on | Manufactured by | Typically used in | References |
Caph | Stormvanger Assemblies, Unlimited | Cyclops | [48][49] |
Zeus-75 Mark IX
The mammoth Zeus-75 fired a four-round burst of hypervelocity depleted uranium armor penetrators (HDUAP), capable of destroying most 'Mechs up to 70 tons in a single salvo.[50][51]
Manufactured on | Manufactured by | Typically used in | References |
Gorton, Kingsley, and Thorpe Enterprises | Rasalhague | MechBuster | [50][51][52] |
See Also
- Caseless autocannon/20: A smaller and lighter version of the autocannon/20 specifically & designed to use caseless ammunition, it had twice the ammunition capacity per given mass, along with a size and weight profile just slightly larger than the autocannon/10. However, it had one critical design flaw that led to it being phased out in favor of a more modern variant of caseless munitions; though these newer munitions were not as lightweight as their counterparts, they could be used with a simple modification to existing autocannons and was far less prone to explosions in the event of a weapon jam.
Notes
- This article refers to a common object and addresses the object as a common noun. The preferred term is "autocannon/20" (except on section titles & table headings, where "Autocannon/20" is favored).
References
- ↑ Interstellar Operations, p. 118: "Prototype Dates For Basic Weapons Table"
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 TechManual, p. 207
- ↑ 3.0 3.1 TechManual, p. 317, "Inner Sphere Weapons and Equipment BV Table"
- ↑ 4.0 4.1 4.2 Era Report: 3052, p. 98, "Regarding Military Technology Classification"
- ↑ TechManual, p. 208, "Autocannon Munitions"
- ↑ Technical Readout: 3025 Revised, p. 140
- ↑ 7.0 7.1 7.2 7.3 Technical Readout: 3039, p. 86, "Demolisher Heavy Tank
- ↑ Technical Readout: 3026 Revised, 46
- ↑ Technical Readout: 3039, 56
- ↑ Technical Readout: 3026, p. 42
- ↑ Objectives: Free Worlds League, p. 34
- ↑ Technical Readout: 3026 Revised, p. 48
- ↑ Storms of Fate, ch. 25
- ↑ Technical Readout: 2750, pp. 54–55
- ↑ Technical Readout: 3025 Revised, p. 139
- ↑ Technical Readout: 3058, p. 129
- ↑ 17.0 17.1 17.2 Technical Readout: Succession Wars, p. 180
- ↑ Technical Readout: 3026 Revised, p. 138
- ↑ Technical Readout: Succession Wars, p. 184
- ↑ Objective Raids, p. 120
- ↑ Technical Readout: 3050 Upgrade, p. 58: "HBK-5M Hunchback"
- ↑ Technical Readout: 3055 Upgrade, p. 58: "THR-1L Thunder"
- ↑ Objective Raids, p. 128: "Produced Kali Yama Weapons Components"
- ↑ Storms of Fate, ch. 11
- ↑ 25.0 25.1 Technical Readout: 3050, p. 152: "AXM-1N Axman"
- ↑ First Somerset Strikers, p. 73: "AXM-2N Axman"
- ↑ BattleTech Compendium: The Rules of Warfare, p. 127: "AXM-2N Axman"
- ↑ Technical Readout: 3050 Upgrade, p. 70: "Axman"
- ↑ Technical Readout: Clan Invasion, p. 144
- ↑ Technical Readout: 3058, p. 82
- ↑ 31.0 31.1 31.2 31.3 Technical Readout: 3075, p. 250
- ↑ Objective Raids, p. 142
- ↑ Objective Raids, p. 94
- ↑ 34.0 34.1 Technical Readout: 3039, p. 159
- ↑ 35.0 35.1 Technical Readout: 3025, p. 110
- ↑ 36.0 36.1 Technical Readout: 3025 Revised, p. 104
- ↑ 37.0 37.1 Technical Readout: Succession Wars, p. 154
- ↑ Technical Readout: 3025, p. 111
- ↑ Technical Readout: 3025 Revised, p. 104
- ↑ Technical Readout: 3050 Upgrade, p. 244
- ↑ Technical Readout: 3026, pp. 32–33, "Saladin Assault Hover Tank"
- ↑ Technical Readout: 3026 Revised, pp. 36–37, "Saladin Assault Hover Tank"
- ↑ Technical Readout: 3026 Revised, p. 36
- ↑ Godfather
- ↑ Technical Readout: 3025, p. 59
- ↑ Technical Readout: 3025 Revised, p. 60
- ↑ Technical Readout: 3025 Revised, p. 158
- ↑ Technical Readout: Succession Wars, p. 168
- ↑ Technical Readout: 3026 Revised, p. 112
- ↑ 50.0 50.1 Technical Readout: 3026, p. 46, "MechBuster Fighter"
- ↑ 51.0 51.1 Technical Readout: 3026 Revised, p. 50, "MechBuster"
- ↑ Technical Readout: 3039, p. 184: "MechBuster"