Germany
6 cm/21 (2.4") Casemate Gun C/98
6 cm/21 (2.4") S-Bts KL/21
6 cm/21 (2.4") Bts KL/21
Updated 19 May 2012
Originally developed as a small anti-torpedo boat gun.  During World War I this weapon was mounted on some landing craft and also used as a landing gun.  Used during World War II on some small coastal defense boats and submarine chasers.
WNGER_6cm-21_skc00_pic.jpg

Chinese gun thought to be very similar to German 6 cm gun
This weapon was captured during the Boxer Rebellion and is now at the German Naval Memorial at Laboe, Germany
Photograph copyrighted by Peter Lienau
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Gun Characteristics
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Designation 6 cm/21 (2.4") Casemate Gun C/98
6 cm/21 (2.4") S-Bts KL/21
6 cm/21 (2.4") Bts KL/21
Ship Class Used On Boat Gun
Date Of Design 1898
Date In Service 1900 (?)
Gun Weight N/A
Gun Length oa 107 in (0.121 m)
Bore Length 99 in (2.505 m)
Rifling Length N/A
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire 12 - 14 rounds per minute
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Ammunition
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Type Separate
Projectiles and Weight HE - 6.0 lbs. (2.71 kg)
Shrapnel - 5.2 lbs. (2.38 kg)
Bursting Charge HE - 0.32 lbs. (0.144 kg)
Projectile Length HE - 7.5 in (19 cm)
Propellant Charge 0.25 lbs. (0.115 kg) W.P. 07
Cartridge 1.74 lbs. (0.79 kg)
60 mm x 64 mm R
Muzzle Velocity HE - 1,434 fps (437 mps)
Shrapnel - 1,470 fps (448 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun N/A
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Range
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Elevation With 6.0 lbs. (2.71 kg) HE Shell
Range Maximum 3,720 yards (3,400 m)
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Mount / Turret Data
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Designation Single mounts
Weight  N/A
Elevation N/A
Elevation Rate Hand operated, only
Train N/A
Train Rate Hand operated, only
Gun recoil N/A
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Data from
"Naval Weapons of World War Two" by John Campbell
"Munitionslexikon Band2" by Karl R. Pawlas
"Waffenlehre" by Richard Berlin Wille
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Special help from H. Zertner and Peter Lienau
Page History

28 May 2008 - Benchmark
19 May 2012 - Updated to latest template