Netherlands
24 cm/40 (9.45")
Updated 02 June 2009
A Krupp gun used on Coastal Defense Ships.  Bore length was 37.15 calibers.  At least two guns were used by the Germans in coastal defense batteries located in the Netherlands.

Although this and other guns of its caliber in service with the Austria-Hungary and German fleets were all built by Krupp, the shell weights were significantly different in each navy.
WNNeth_945-40_Jacob_van_Heemskerck_pic.jpg

Colored postcard of Jacob van Heemskerck
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Gun Characteristics
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Designation 24 cm/40 (9.45")
Ship Class Used On Jacob van Heemskerck and Hertog Hendrik
Date Of Design about 1900
Date In Service 1902
Gun Weight 24.1 tons (24.5 mt)
Gun Length oa 378 in (9.600 m)
Bore Length 351 in (8.916 m)
Rifling Length N/A
Grooves N/A
Lannds N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire about 2 rounds per minute
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Ammunition
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Type Separate
Projectile Types and Weights AP - 375 lbs. (170 kg)
HE - 375 lbs. (170 kg)
Bursting Charge N/A
Projectile Length N/A
Propellant Charge N/A
Muzzle Velocity Ships:  2,690 fps (820 mps)
As coastal defense:  2,559 fps (780 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun N/A
Note:  Propellant appears to have been in a single charge.
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Range
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Elevation With 375 lbs. (170 kg) AP Shell
Range @ 20 degrees about 16,000 yards (14,630 m)
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Mount / Turret Data
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Designation Single Turrets
   Jacob van Heemskerck (2) and Hertog Hendrik (2)
Weight  194.3 tons (197.4 mt)
Elevation -4 / +20 degrees
Elevation Rate N/A
Train about +120 / -120 degrees
Train Rate N/A
Gun recoil N/A
Loading Angle N/A
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Data from
"Naval Weapons of World War Two" by John Campbell
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Special help from Kornel Hoekerd
Page History

27 August 2006 - Benchmark
02 June 2009 - Added picture of Jacob van Heemskerck