28 cm L/42,5

Scheme of one of her turrets

Gun specs
Manufacturer Krupp, Germany
Purpose Low Angle (seatargets only)
Bore 28 cm (11 inch)
Classes used on Zeven Provinciën
Length 42,5 calibers
Length ( m ) 11,9 m
Gunweight 31 tons
Initial velocity 2920 feet/sec
Shell specs
Shell weight 595 lbs
Max penetration ( with AP ) 8 inch @ 8000 meters
13 inch @ 5000 meters
15,5 inch @ 3000 meters
Shell supply 100 rounds per gun
Mount specs
Mount armor 250 mm
Train + 130 / - 130 degrees

Sources
Jane's fighting ships of the world, 1931 edition
Warship International

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