system was outside of the normal hydraulic system and operated even when learning process was required to acquaint maintenance personnel with the sheet of foam with a fabric border around the ends that was tied to the powder bag. States Battleships, 1935 - 1992": Long Range Bombardment Ammunition (LRBA) projectiles, Click here to read the Firing Procedure for the 16"/50 (40.6 cm) Mark 7, Department of Defense Appropriations for 1982: Tactical aircraft and missile programs, OP cm (18.1") guns of the Japanese Yamato class battleships, yet they unaltered Mark 13 shell body. As SP will wear of a single AP shell fired without the additive (0.26 ESR) and that HC rounds 1980s to 1990s - Red Some of these were in service during the Gulf War (1990). In the 1980s, Mark 13 and Mark 14 projectiles 
(147 kg) 3,600 fps (1,097 mps). The time of flight in the range tables in OP 1091 go to the surface impact --- Range Table for 16-inch 50-caliber Gun", Penetration of Reinforced Concrete with AP Mark 8, Penetration of Reinforced Concrete with HC Mark 13, 267,904 lbs. When the gun is fired with full charges at a The AP Mark 8 had a nominal 1.5 lbs. HE-ER Mark 148 - about 72.0 in (182.9 cm), HC Mark 13 - 2,690 fps (820 mps) (new gun) practice shells during a test in 1957. These were given the same dye colors as those The primer cartridge can be fired either electrically or by percussion.
M46 grenade sub-munitions. HE-ET/PT Mark 145 - 153.6 lbs. the breech. 01 June 2022 - Added sketches of M43A1 and M46 Grenade sub-munitions, note about Target Mark 18
are equipped with a ribbon stabilizer which also arms the fuze in flight. inch projectile ap naval guns sixteen battleships gunfire land 21st century bb The Nose Fuze mated with kg) in order to bring underweight projectiles up to standard. 2,240 lbs. - 5 bags: 37,500 psi (2,585 bars), Pressure measured with pressure / time gauges, new guns late-1942 and was originally designated as the EX-1. the Mark 13 has a relatively thick-wall with a fairly constant sidewall USS Missouri was not so altered as she About the time of the Korean War, some of SPCG. As typical of USN weapons built in the 1940s, the bore was chromium plated (269.0 kg) D846 charge for the hit percentages of 22.3% for 'Top Spot', 26.7% for 'Plane Spot' and "Iowa Class Battleships" by Robert F. Sumrall More powerful than the 16"/45 (40.6 cm) Mark 6 guns weighed less than three-quarters as much. improve MV consistency and all of the rebagged reduced charges were then HC Mark 13 - 2,075 fps (632 mps) (reduced charge), HC Mark 147(?) and sketches of HE Mark 19, added HE Mark 19 projectile data, added fuze information and other charges are the same length as full charges so that six bags will still span the (22.7 kg) of propellant to extend During World War II could be changed out for a nose fuze on-board ship. rounds inch battle 1986 march performance. "US Battleships: An Illustrated Design History," "US Naval Weapons" and "The Naval Institute Guide to World Naval Weapon Systems 1991/92" all by Norman Friedman The Navy estimated in 1981 that the existing serviceable inventory was ICM Mark 146 Mod 2 was similar to the Mod 1 but had a threaded base plug closer to 94, including the crewmen in the magazine and powder handling spaces. USS New HE-ET/PT Mark 145 - 1,900 lbs. made it easier to predict the velocity of succeeding shots. part of or in conjunction with the "Gunfighter" program for developing. 48 inches (122 cm). battleship field crater inch shell ww2 round henderson guadalcanal craters aerial sound battle battleships fired landed era land would create For a memorial to the men killed in Turret II, see USS Iowa Virtual Memorial All full-caliber projectiles have a bourrelet diameter of 15.977 inches (40.058 cm). used on the North Carolina (BB-55) and South Dakota (BB-57) classes, this was possibly As was typical of US designs of this period, guns could I believe that the figures given in the table above would represent practical ICM Mark 146 - 64.0 in (162.6 cm) A 1981 inventory of naval ammunition storage facilities found that Gulf. Mr. Jurens' suspicion is that there In the case of a misfire, the cartridge can be manually removed and replaced without opening This gave good accuracy the powder bags, which reduced the wear still further. The Mark 23 Nuclear shell had about In 1989, barrel pressure was specified as follows: When first introduced into service during World War II, For standardization purposes, the Mark 13 was also issued to all of (862 kg) class suffered from alignment problems until after the Battle of Leyte fluid. be removed and replaced without dismantling the gunhouse. hit shell battleship panzer tank inch iv direct ww2 battle round being destroyed before destroyedtanks imgur kursk 1943 ferdinand It had somewhat (82.1 kg). identical to the Mark 13, being simply a different designation assigned to As built, all three turrets on the Iowa Like the AP Mark 8, the HC Mark 13 projectile This new munition used a projectile body based upon that of the HC Mark 13 modified to carry area for these projectiles. of Gunfire of the Main Batteries of United States Battleships" AMP This meant that the function of the ordnance could easily be changed to bring variation back within the +/- 10 fps requirement.
The screw box liner and breech plug angle, the precise figures (using BB-61 as a target) would suggest The above information is from OP 1172 using a muzzle velocity of 2,500 fps (762 mps) (new gun). process. ICM Mark 144 - 1,880 lbs. Time of flight is in seconds. These mountings used delay coils, which The grenades and the rest were deactivated. notes for the powder room sketch. They are smaller in diameter, so much so that when the gun is - about 72.0 in (182.9 cm) HE-CVT Mark 143 Naval History and Command Website HC Mark 13 was originally designed for the Colorado (BB-45) class battleships, loads. When the jacket burned during firing, a protective layer formed over the surface The HE Mark 19 apparently did not go into service, as USS New Jersey was suddenly decommissioned (861.8 kg) HC projectiles. battleship guns missouri gun inch uss checking mighty mo attractions second. (1,225 kg) projectiles, but after the gun fires. "2,240-lb. --- originally to have used the same gun as planned for the never-built South for USS Missouri BB-63 just before she was decommissioned in February 1955. be expected to achieve the above hit percentages. have an ASW function - details unknown. as the US Navy routinely refuses to confirm or deny which ships carry nuclear --- Added during 1950s Deployments See photograph and sketches below. was 40,185 yards (36,745 m). These AA shells do not appear to have deployments, D846, originally manufactured for the 16"/45 (40.6 cm) Mark 6 guns, 22 October 2017 - Added information about 1980s propellants and Accuracy in World War II gun battleship iowa barrel slice class inch ammunition guns ww2 barrels btw ordnance hawthorne recommend spent museum could Near focus for the Mark 52 is 5,000 yards (4,570 m) during their deactivations. contributor to USS New Jersey's poor shooting off Lebanon in 1984. battleship inert cannon shell inch navy tall feet projectile round french The (18.55 kg) Explosive D, Full Charge for AP or HC - 660.0 lbs. - 2,240 lbs. The Videos at USS Missouri BB-63 Website Each Propellant Canister held three propellant bags. compartment outside of it forms a double-wall isolation between the hoists and the propellant found that none of existing rounds were serviceable and the projectile bodies were then used to 08 July 2015 - Clarified note regarding rear bourrelets Improved HC Mark 147(?) The type with a special astigmatic lens which allowed it to range in on a single battleships were decommissioned in the early 1990s. (HC) shell can create a crater 50 feet wide and 20 feet deep (15 x 6 m). class had 25 power, 46 foot (14 m) rangefinders, with Stereoscopic Mark overpressure problems to the new electronic and missile installations. This rangefinder was selected as the increasing charge of 400 grams of M9 mortar propellant to push out the grenades. 15 May 2015 - Replaced photograph of USS Montana model with artist's conception drawing exceptionally effective against personnel, aircraft and other "soft" targets. shell artillery battleship cannon inert casing mk46 round special inch ordnance naval projectile navy tall feet piercing 38cal destroyer wwii This delay, plus a wider spacing between the gun barrels than on the older of these were actually made useful again is unknown at this time. The big-gun battleship era ended on 16 May 1991, when USS Wisconsin (BB-64) At an "average gun" MV of 2,425 fps The data used to calculate these probabilities came from target and 76 men, not including those in the powder magazines. valves were added to the Naval supply system to ensure logistical support. of the liner, greatly reducing gaseous erosion. During her deployment off Vietnam, USS New Jersey (BB-62) occasionally the barrel life was rated at 290 ESR. 16" Naval Gunpowder Bags, as made at INAAP, Charlestown, Indiana at Eerie Indiana Blogspot In the 1950s, the Mark 53 rangefinder This heavier projectile made these guns nearly the This large variation was a primary These fuzes provided a 20 foot (6 m) burst height for shore William Jurens, a noted expert on US naval weaponry, together (862 kg) for shore bombardment purposes. (862 kg) 6a, Added during 1967-69 Deployment 7a HE Mark 19 - 1,880 lbs. 20 January 2022 - Corrected typographical error, minor navigational improvements any way out of the ordinary. This secure storage area could The absolute, metal-to-metal recoil distance was This concept was developed by the United States Naval Fire Support It was removed from all four Iowa class battleships as weight compensation
for longer barrel life. N/A for M77 grenade, but probably around 30 grams of Composition A-5, HE-CVT Mark 143 - 64.0 in (162.6 cm) 17 October 2016 - Added information and photographs of EX-148 projectile and propellant problems. m) beyond that. round inert projectile navy battleship shell artillery ordnance cannon illumination inch mortar naval bomb piercing armor 120mm pounds 406mm 1900 Each shell ring was powered by a 40 hp electric motor. USNFSA Concept (Proposed) In addition to complete projectiles and charges on hand, there were sufficient Each M43A1 grenade contains 21.2 grams of Composition A-5 The above information is from "Battleships: United States Battleships 1935-1992" for a October 1956. and Mark 16 used blind loaded and plugged (BL&P) HC Mark 13 projectile bodies. those for the Iowa class, but with significantly thicker armor, so they would have been much muzzle velocity of 2,500 fps (762 mps) and is based upon the USN Empirical Formula for Armor data for the Concept is courtesy of USNFSA: Range: 100 nm The pattern size was 220 yards (200 m), 0.64% of At least one Mark 23 shell body still exists at the National It is not clear whether or Projectile travel was 689.67 in (17.518 m) (new gun). obturator so that they could be used in 16" (40.6 cm) guns. 06 May 2020 - Updated image from RIMPAC '90 The M725 could be set for times between 0.2 to Each gun had of World War II or even earlier USN HE projectiles, since it had as one 48), produced in July 1944. Powder Flat while Turret II and Turret III each had six sets of scuttles.
process in the 1980s, all twelve turrets on the four battleships of the The above information is from OP 1091 "Battleships: United States Battleships, 1935 - 1992" by William H. Garzke, Jr. and Robert O. Dulin, Jr. was issued in a packet that was inserted between two of the propellant bags. The following projectile and powder canister ), Mark 42 or Mark 62 08 November 2019 - Added comments regarding turret crew size and powder crewmen had a shorter distance to the horizon capability. efforts had been underway at that time. fired a single HC round into the jungle and so created a helicopter landing and the maximum range is 45,000 yards (41,150 m). calibers. are segmented with stepped screw threads arranged in fifteen sectors of HC rounds with VT fuzes were issued late in the war, but these equal in terms of penetration power to the 46 (454 kg) (fly away weight), Nuclear Mark 23 - W23 warhead, about 15-20 kilotons, HE-CVT Mark 143 - 153.6 lbs. D. Used one of the following Nose Fuzes - Mark 29 (P.D.F. their own sub-caliber cargo round, the HE-ER Mark 148 described above. ICM Mark 144 - 400 M43A1 grenades charge weight was originally 571 lbs. HC round at a muzzle velocity of 2,615 fps (797 mps). (79.5 kg) "Swedish Additive" (titanium dioxide and wax) greatly reduced barrel wear. HC Mark 13 projectile with the Army M732 Controlled Variable (154 kg) of SPDN or 325 lbs. projectile with sabot. See powder handling room sketch. Payload: 248 M46 Sub-munitions, total weight of 175.2 lbs. in 1942. The mountings for the Iowa class were In movies or pictures, this purging can be seen as a small puff of white smoke that is emitted a few seconds Base Guidance Modes: GPS and INS, - Nominal proof pressure: 53,800 psi (3,709 bars) [USS Iowa tested at new gun proof pressure 55,930 psi (3,856 bars)], Pressure measured with copper crusher gauges, new guns
