The 8"/30 caliber gun (spoken "eight-inch-thirty-caliber") formed the main batteries of the United States Navy's "New Navy". They were a US naval gun that first entered service in 1886, and were designed for use with the first three protected cruisers, Atlanta, Boston and Chicago.[1]
8"/30 caliber Mark 1 & 2 Naval Gun
USS Boston's forward 8"/30 gun is in the right foreground, with its crew standing at their posts.
Mark 1, Nos. 1–4, Mod 0, consisted of a tube, jacket, 19 hoops and an elevating band with integral trunnions. The Mod 1 had no trunnions and were not hooped to the muzzle. They weighed 29,100 lb (13,200 kg), without the breech, with a barrel length of 240 in (6,100 mm) bore (30 calibers).[1][2]
Mark 2edit
A sailor from the USS Chicago with an 8-inch gun
The Mark 2 Mod 1, Nos. 5–8, was similar, but had the hoops differently arranged, did not have integral trunnions and had its rear sights controlled by worm and miter gears. Mark 2 gun No. 7, from Chicago, was later modified into a pneumatic gun and mounted in Vesuvius to fire a 10 in (254 mm) aerial torpedo.[1][2]
Two guns from the cruiser Boston are currently (2010) on display at Hamlin Park in Shoreline, Washington. A plaque at the site states that one of these guns fired the first shot at the Battle of Manila Bay on 1 May 1898. Another plaque states
8-inch 30 Caliber Gun U.S.S. Boston Captain Frank Wildes, U.S. Navy Commanding This gun is credited at THE BATTLE OF MANILA BAY with dismounting three guns in the Spanish fort at Cavite May 1, 1898
[3] The two guns from Boston are marked "U. S. NAVY 8in MARK II 1899 CONVERTED".
"United States of America 8"/30 (20.3 cm) Marks 1 and 2". Navweaps. 29 July 2016. Retrieved 19 October 2016.
. The Sun Break. 8 June 2013. Archived from the original on 12 November 2015. Retrieved 9 November 2015.
External linksedit
Photo gallery of USS Boston at NavSource Naval History
Photo gallery of USS Chicago at NavSource Naval History
Photo gallery of USS Atlanta at NavSource Naval History
Bluejackets Manual, 1917, 4th revision: US Navy 14-inch Mark 1 gun
April 12, 2024
inch, caliber, caliber, spoken, eight, inch, thirty, caliber, formed, main, batteries, united, states, navy, navy, they, were, naval, that, first, entered, service, 1886, were, designed, with, first, three, protected, cruisers, atlanta, boston, chicago, calibe. The 8 30 caliber gun spoken eight inch thirty caliber formed the main batteries of the United States Navy s New Navy They were a US naval gun that first entered service in 1886 and were designed for use with the first three protected cruisers Atlanta Boston and Chicago 1 8 30 caliber Mark 1 amp 2 Naval GunUSS Boston s forward 8 30 gun is in the right foreground with its crew standing at their posts TypeNaval gunPlace of originUnited StatesService historyIn service1886 1906Used by United States NavyWarsSpanish American War World War IProduction historyDesignerBureau of OrdnanceDesigned1883ManufacturerU S Naval Gun FactoryProduced1886 No builtMark 1 4 Nos 1 4 Mark 2 4 Nos 5 8 VariantsMark 1 Mod 0 and 1 and Mark 2 Mod 1SpecificationsMass29 100 lb 13 200 kg without breech Length257 99 in 6 553 mm Mark 1 Mod 0 254 6 in 6 470 mm Mark 1 Mod 1 255 6 in 6 490 mm Mark 2 Mod 1Barrel length240 in 6 100 mm bore 30 calibers 244 78 in 6 217 mm bore 30 calibersShell260 lb 120 kg Caliber8 in 203 mm Elevation 5 to 20 Traverse 150 to 150 Rate of fire0 5 1 round per minuteMuzzle velocity2 000 ft s 610 m s Effective firing range14 000 yd 13 000 m at 20 elevation Contents 1 Mark 1 2 Mark 2 3 Naval Service 4 On display 5 Notes 6 References 7 External linksMark 1 editMark 1 Nos 1 4 Mod 0 consisted of a tube jacket 19 hoops and an elevating band with integral trunnions The Mod 1 had no trunnions and were not hooped to the muzzle They weighed 29 100 lb 13 200 kg without the breech with a barrel length of 240 in 6 100 mm bore 30 calibers 1 2 Mark 2 edit nbsp A sailor from the USS Chicago with an 8 inch gunThe Mark 2 Mod 1 Nos 5 8 was similar but had the hoops differently arranged did not have integral trunnions and had its rear sights controlled by worm and miter gears Mark 2 gun No 7 from Chicago was later modified into a pneumatic gun and mounted in Vesuvius to fire a 10 in 254 mm aerial torpedo 1 2 Naval Service editShip Gun Installed Gun MountUSS Atlanta 1884 Mark 1 2 8 30 caliber Mark 1 2 Single Barbette MountUSS Boston 1884 Mark 1 2 8 30 caliber Mark 1 2 Single Barbette MountUSS Chicago 1885 Mark 2 4 8 30 caliber Mark 2 4 Single Half turret On display edit nbsp Two guns from the cruiser Boston are currently 2010 on display at Hamlin Park in Shoreline Washington A plaque at the site states that one of these guns fired the first shot at the Battle of Manila Bay on 1 May 1898 Another plaque states 8 inch 30 Caliber Gun U S S Boston Captain Frank Wildes U S Navy Commanding This gun is credited at THE BATTLE OF MANILA BAY with dismounting three guns in the Spanish fort at Cavite May 1 1898 3 The two guns from Boston are marked U S NAVY 8in MARK II 1899 CONVERTED Notes edit a b c Navweaps 2016 a b Friedman 2011 p 173 The Sun Break 2013 References editBooksFriedman Norman 2011 Naval Weapons of World War One Seaforth Publishing ISBN 978 1 84832 100 7 Online sources United States of America 8 30 20 3 cm Marks 1 and 2 Navweaps 29 July 2016 Retrieved 19 October 2016 7 Odd Things to See in Seattle Parks North End Edition The Sun Break 8 June 2013 Archived from the original on 12 November 2015 Retrieved 9 November 2015 External links editPhoto gallery of USS Boston at NavSource Naval History Photo gallery of USS Chicago at NavSource Naval History Photo gallery of USS Atlanta at NavSource Naval History Bluejackets Manual 1917 4th revision US Navy 14 inch Mark 1 gun Retrieved from https en wikipedia org w index php title 8 inch 30 caliber gun amp oldid 1166821100, wikipedia, wiki, book, books, library,
