Sunday 8 February 2015

Heavy Triplex

"Tactical-Technical Requirements for a 254 mm gun, 305 mm howitzer, and 400 mm mortar on a T-35 chassis

Main requirements:
Item
254 mm gun
305 mm howitzer
400 mm mortar
Range (km)
*
21
13
Combat mass (tons)
55-60
55-60
55-60
Travel mass (tons)
55-60
55-60
55-60
Shell mass (kg)
200-240
340
640
Vertical traverse arc (degrees)
55
65
70
Horizontal traverse arc (degrees)
10
10
10
Rate of fire (RPM)
1
1/2
1/3
Time to deploy from travel to combat mode and back (minutes
5
5
5
*Muzzle velocity and range depend on final choice of shell

Requirements:
  • Stress on suspension elements must be evenly distributed.
  • The system must be stable in motion when tilted at least 20 degrees.
  • The system must be able to traverse a 35 degree grade.
  • The ground pressure must be 0.6-0.7 kg/cm^2.
  • The maximum speed should be 20 kph.
  • The system must have enough fuel to run for 6 hours.
  • The system must be able to cross a 4.5 meter wide trench.
  • The system must be able to ford a 1-1,1 meter deep water hazard.
  • The height of the tow hook must be 1 meter.
  • Access to the engine and control mechanisms must be convenient.
  • The SPG should fit within the dimensions of a railroad car.
  • The chamber should accept existing 10 inch and 12 inch land and naval artillery shells."

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