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
Read more about this topic: QF 4.5 Inch Howitzer
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