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BL 5.5 inch Medium Gun

BL 5.5 inch Medium Gun Mk 3
Ordnance bl55 140mm gun hameenlinna 1.jpg
BL 5.5 inch Mk 3 at The Artillery Museum of Finland
Type Medium gun
Place of origin  United Kingdom
Service history
In service 1941-1980 (UK)
Used by

 United Kingdom
 France
 Poland
 Australia
 Canada
 India
 Portugal
 Myanmar
 Iraq
 Malaysia
 Namibia
 Oman
 Pakistan
 South Africa

 New Zealand (13)
Wars World War II, Korean War, Yemen, Borneo Conflict, Angolan Civil War
Production history
Produced 1941-1945
Specifications
Weight 13,647 lbs (6,190 kg)
Barrel length 13 ft 9 in (4.19 m) L/30
Width 8 ft 4 in (2.54 m)
Crew 10

Shell HE shell: 100 lb (45.5 kg) and 82 lb (37 kg)
Calibre 5.5 inch (140 mm)
Breech Welin breech and Asbury mechanism
Recoil Hydro-pneumatic
Carriage Split trail
Elevation -5° to 45°
Traverse 30° left and right
Rate of fire 2 rpm
Muzzle velocity 100lb shell: 1,675 ft/s (511 m/s)
82lb shell: 1,950 ft/s (590 m/s)
Maximum firing range 100lb shell: 16,200 yd (14,813 m)
82lb shell: 18,100 yd (16,550 m)
Sights Probert pattern reciprocating and calibrating

 United Kingdom
 France
 Poland
 Australia
 Canada
 India
 Portugal
 Myanmar
 Iraq
 Malaysia
 Namibia
 Oman
 Pakistan
 South Africa


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