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mogami -> Data (2/15/2003 11:43:14 PM)
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Hi, 169 guns were produced (68 of these were deployed in land mounts)
Gun
Designation 10 cm/65 (3.9") Type 98 (Model 1938)
Ship Class Used On Akitsuki, Oyodo, Taiho and B-64
Date Of Design 1938
Date In Service 1942
Gun Weight 6,731 lbs. (3,053 kg)
Gun Length oa 265.0 in (6.730 m)
Bore Length 255.9 in (6.500 m)
Number Of Grooves 32
Length Of Rifling 221.7 in (5.631 m)
Chamber Volume 641 in3 (10.5 dm3)
Rate Of Fire 15 - 21 rounds per minute
Ammo
Type Fixed
Weight of Complete Round HE - 61.7 lbs. (28 kg)
Projectile Types and Weights HE - 28.67 lbs. (13 kg)
Bursting Charge N/A
Projectile Length 44 in (111.8 cm)
Propellant Charge 13.2 lbs. (6 kg)
Cartridge - 33 lbs. (15 kg)
Muzzle Velocity 3,281 fps (1,000 mps)
Working Pressure 19.4 tons/in2 (3,050 kg/cm2)
Approximate Barrel Life 350 - 400 rounds
Ammunition stowage per gun about 400 rounds
Range
Elevation With 28.67 lbs. (13 kg) HE Shell
Range @ 45 degrees 21,325 yards (19,500 m)
AA Ceiling @ 90 degrees 42,651 feet (13,000 m)
Mount/Turrent data
Designation Twin Mounts
Akitsuki (4), Oyodo (4), Taiho (6) and B-64 (8)
Weight 76,060 lbs. (34,500 kg)
Elevation -10 / +90 degrees
Elevation Rate 16 degrees per second
Train Oyodo, Taiho and B-64: About +/-70 degrees
Akitsuki: About -150 / +150 degrees
Train Rate 12-16 degrees per second
Gun recoil N/A
The guns had a very short service life, they wore out after 350-400 rounds fired
Data from
"Battleships: Axis and Neutral Battleships" by W. H. Garzke, Jr. and R. O. Dulin, Jr.
"Japanese Warships of WWII" by A. J. Watts
"Naval Weapons of WWII" by John Campbell
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