| Status: |
In-Service [Mark 247/248/249/250/252/253/254]; Retired [Mark 251] |
| Action: |
Electro-Thermal Chemical Plasma-propellant Cannon |
| Magazine Size: |
335 rounds [Mark 247]; 400 rounds [Mark 248]; 85 rounds [Mark 249]; 680 rounds [Mark 250]; 400 rounds [Mark 251]; 315 rounds [Mark 252]; 400 rounds [Mark 253]; 120 rounds [Mark 254] |
| Shell Caliber: |
6.1 in. [Mark 247]; 8.0 in. [Mark 248]; 3.0 in. [Mark 249]; 5.0 in. [Mark 250]; 18.0 in. [Mark 251]; 14.0 in. [Mark 252]; 20.0 in. [Mark 253]; 2.25 in. [Mark 254] |
| Length: |
- Overall: N/A
- Barrel: 378.00 in. [Mark 247]; 440.00 in. [Mark 248]; 496.00 in. [Mark 249]; 310.00 in. [Mark 250]; 936.00 in. [Mark 251]; 952.00 in. [Mark 252]; 1,040.00 in. [Mark 253]; 157.50 in. [Mark 254]
|
| Width: |
N/A |
| Height: |
N/A |
| Weight: |
- Gun: 96.50 tons [Mark 247]; 77.45 tons [Mark 248]; 8.50 tons [Mark 249]; 21.70 tons [Mark 250]; 2,000.00 tons [Mark 251]; 1,200.00 tons [Mark 252]; 3,250.00 tons [Mark 253]; 8.50 tons [Mark 254]
- Projectile: Varies
|
| Rate of Fire: |
10 rpm [Mark 247]; 12 rpm [Mark 248]; 120 rpm [Mark 249]; 20 rpm [Mark 250]; 2 rpm [Mark 251]; 3 rpm [Mark 252]; 1.5 rpm [Mark 253]; 220 rpm [Mark 254] |
| Muzzle Velocity: |
Mark 247
- Extended Range: 990 m/s
- High Explosive: 990 m/s
Mark 248
- Extended Range: 1,070 m/s
- High Explosive: 1,070 m/s
Mark 249
- Extended Range: 1,050 m/s
- High Explosive: 1,065 m/s
Mark 250
- Extended Range: 1,005 m/s
- High Explosive: 1,260 m/s
Mark 251
- Armor Piercing: 1,050 m/s
- Extended Range: 950 m/s
- High Explosive: 950 m/s
Mark 252
- Armor Piercing: 1,033 m/s
- Extended Range: 988 m/s
- High Explosive: 988 m/s
Mark 253
- Armor Piercing: 1,158 m/s
- Extended Range: 1,105 m/s
- High Explosive: 1,105 m/s
Mark 254
- Extended Range: 1,120 m/s
- High Explosive: 1,205 m/s
|
| Effective Range: |
Mark 247
- Extended Range: 120.00 nm
- High Explosive: 28.75 nm
Mark 248
- Extended Range: 41.65 nm
- High Explosive: 20.50 nm
Mark 249
- Extended Range: 18.50 nm
- High Explosive: 14.75 nm
Mark 250
- Extended Range: 74.50 nm
- High Explosive: 25.00 nm
Mark 251
- Armor Piercing: 37.00 nm
- Extended Range: 48.75 nm
- High Explosive: 37.00 nm
Mark 252
- Armor Piercing: 26.00 nm
- Extended Range: 38.50 nm
- High Explosive: 26.00 nm
Mark 253
- Armor Piercing: 60.00 nm
- Extended Range: 74.25 nm
- High Explosive: 60.00 nm
Mark 254
- Extended Range: 10.75 nm
- High Explosive: 8.75 nm
|
| Cost: |
N/A |
| Special Notes: |
None |
| Users: |
Imperial Layartebian Defense Forces
Imperial Layartebian Navy |
| Variants: |
AGS - Prototype program converted to naval ETC gun program
Mark 247 Mod 1 - 6.1 in./62-caliber model for heavy escorts
Mark 248 Mod 1 - 8 in./55-caliber model for cruisers and heavy secondaries
Mark 249 Mod 1 - 3 in./62-caliber model for light escorts
Mark 250 Mod 1 - 5 in./62-caliber model for escorts and light secondaries
Mark 251 Mod 1 - 18 in./52-caliber model for Earthquake class battleship
Mark 252 Mod 1 - 14 in./68-caliber model for heavy cruisers
Mark 253 Mod 1 - 20 in./52-caliber model for Overburdened class battleship
Mark 254 Mod 1 - 2.25 in/70-caliber model for light vessels |
