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Constructed of A tube, two part jacket and screwed-on breech piece. Originally used a sliding horizontal breech mechanism but was later fitted with a conventional Welin breech mechanism. |
Turrets for Väinämöinen
in Bofors erecting shop
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Turret for Väinämöinen in
Bofors erecting shop
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254 mm propellant casings |
| Designation | 254 mm/45 (10") Bofors |
| Ship Class Used On | Väinämöinen class |
| Date Of Design | about 1929 |
| Date In Service | 1932 |
| Gun Weight | 37.3 tons (37.9 mt) including breech mechanism |
| Gun Length oa | 262.6 in (10.339 m) |
| Bore Length | about 450 in (17.717 m) |
| Rifling Length | N/A |
| Grooves | N/A |
| Lands | N/A |
| Twist | N/A |
| Chamber Volume | N/A |
| Rate Of Fire | about 2 - 3 rounds per minute |
| Type | Separate |
| Projectile Types and Weights | APC - 496 lbs. (225 kg) |
| Bursting Charge | N/A |
| Projectile Length | N/A |
| Cartridge Case Type, Size and Empty Weight | probably brass, size N/A, 99 lbs. (45 kg) |
| Propellant Charge | 154 lbs. (70 kg) |
| Muzzle Velocity | 2,789 fps (850 mps) |
| Working Pressure | N/A |
| Approximate Barrel Life | N/A |
| Ammunition stowage per gun | N/A |
| Elevation | With 496 lbs. (225 kg) AP Shell |
| Range @ 45 degrees | 33,140 yards (30,300 m) |
| Designation | Twin Mounts
Väinämöinen (2) |
| Weight | 252 tons (256 mt) |
| Elevation | -10 / +45 degrees |
| Elevation Rate | N/A |
| Train | about +150 / -150 degrees |
| Train Rate | N/A |
| Gun recoil | 26.6 in (67.5 cm) |
| Loading Angle | 0 degrees |
| Note: The turret was on a ball track and was electrically powered with hydraulic drive for training and elevation. Guns were individually sleeved but could be coupled together. | |
Kosaku Ariga (Jarek) website