QF 4.5 Inch Howitzer - Extended Specification

Extended Specification

Gun

  • Overall length: 5 ft 10 in
  • Bore length: 60 inches
  • Weight: 972 lb (Mk1), 1,021 lb (Mk2) including breech
  • Rifling: PPS 32 grooves
  • Twist: 1 in 20-15 increasing twist (Mk I)
    1 in 20 uniform twist (Mk II)
  • Breech: horizontal sliding block


Carriage

  • Weight: 27 cwt (1,372 kg) total weight
  • Width: 6 ft 9 inches
  • Recoil: 40 inches (0° elevation) 20 inches (45° elevation)
  • Elevation: -5° to +45°
  • Traverse: 3° right and left


Ammunition

  • "Shell HE" Mk 12 to 16 - 4.3 lb Amatol or TNT filled. Minor differences between marks
  • "Shell Smoke Bursting" Mk 3 to 11 - White phosphorus filled
  • "Shell Smoke Base Ejection" Mk 1 - Hexachloroethane/Zinc filled
  • "Shell Star" Mk 3 - Star unit & parachute with Fuze Time & Percussion No 221
  • Shell weight: 35 lbs
  • Propellant charge: 5 parts, from .4 to 1 lb loaded into a 3.4-inch-long brass case

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