ORDNANCE QF 18/25 PDR Mk. I

ORDNANCE QF 18/25 PDR Mk. I
Image: 18/25 pdr (Canadian Soldiers)
YearAugust 1936
Weapon TypeLight Field Gun/Howitzer
Origin & DesignerBritain/Vickers
Numbers Produced1.418
Crew6 (Gun Sergeant, Gunner, Loader, Breech Operator & 2 x Ammunition Bearers)
Calibre87.6mm (87x292R)
Elevation-5° to +37.5°
Traverse4.5° Left & Right
BreechVertical Sliding Block
RecoilHydropneumatic
Gun SightNo. 7
Gun Mount[@gun_mounts]
CarriageBox Trail
Trailers[@trailers]
Gun Shield[@gun_shield]
Armoured Plate[@armoured_plate]
Barrel Length2.450mm (L/28.8)
Overall Length8.16m
Width[@width]
Height[@height]
WeightWeight in Traction: 2.516 kg
Weight in Action: 1.625 kg
Round WeightHE: 11.33 kg.
Smoke: 9.89 kg.
Muzzle VelocityHE: 11.33 kg.
Smoke: 9.89 kg.
Feed[@feed]
Magazine Capacity[@magazine_capacity]
Practical Rate of Fire[@practical_rate_of_fire]
Rate of Fire6 r.p.m.
Maximum Rate of Fire[@maximum_rate_of_fire]
Maximum Ceiling[@maximum_ceiling]
Maximum Ground Range[@maximum_ground_range]
Maximum Range11.700m
Armour Penetration[@armour_penetration]
TractionMotorised (Dragon Mk. IID)
Variants[@variants]
NotesAfter World War One the British army requested a weapon that could utilized as both a field gun and howitzer, up to then this role was done by different weapons, the 18 pounder and the 4.5in howitzer. The calibre was to be 94mm and have good range and light enough to be moved in the field. The problem again was down to money, and due to the large amounts of 18 pounders that were available the military decided to re-line the barrels of a number of these guns. Problems arose with the calibre as the 18 pounder could only be re-lined to 87mm, so in 1935 the decision was made to adopt this as their standard calibre. Two different carriages were used, the first had a Box Trail (Mk. IVP), the second a Split Trail (Mk. VP). The 18/25 pounders were to see service in France, Norway and North Africa before being replaced by the standard 25 pounder.