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