Editing USS Philadelphia (C-4) (section)

==Design and construction==

''Philadelphia'' was built to Navy Department plans, with twelve [[6"/30 caliber gun|6-inch (152 mm)/30]] [[caliber (artillery)|caliber]] guns.<ref name=NavWeaps1>[http://www.navweaps.com/Weapons/WNUS_6-30_mk1.htm DiGiulian, Tony, US 6"/30, 6"/35, and 6"/40 guns at Navweaps.com]</ref> Two guns each were on the bow and stern, with the remainder in [[sponson]]s along the sides. Secondary armament was four [[QF 6-pounder Hotchkiss|6-pounder ({{convert|57|mm|in|abbr=on}}) guns]], four [[QF 3-pounder Hotchkiss|3-pounder]] ({{convert|47|mm|in|2|abbr=on}}) [[Hotchkiss revolving cannon]], two 1-pounder ({{convert|37|mm|in|abbr=on}}) Hotchkiss revolving cannon, and two [[.45-70|.45 caliber]] (11.4&nbsp;mm) [[Gatling gun]]s.<ref name=Conways1/><ref name=Friedman1/> Some of the weapons listed as Hotchkiss revolving cannon may actually have been [[quick-firing gun|rapid-firing guns]]. Four 14-inch (356&nbsp;mm) [[torpedo tube]]s were included in the design but never mounted.<ref name=Register1/>

References vary as to the ship's armor. ''Philadelphia'' probably had {{convert|3|in|mm|abbr=on}} [[gun shield]]s and a {{convert|3|in|mm|abbr=on}} [[conning tower]]. The armored deck was up to {{convert|4|in|mm|abbr=on}} thick.<ref name=Conways1/>

The engineering plant included an unusual mix of boilers: four [[Scotch boiler|Scotch return-tube double-ended]], one single-ended, and four [[locomotive boiler]]s.<ref name=Friedman1/> These produced {{convert|160|psi|lk=on|abbr=on}} steam for two horizontal [[triple expansion engine]]s totaling {{convert|10500|ihp|lk=on|abbr=on}} (designed) for a designed speed of {{convert|19|kn|lk=in}}.<ref name=Friedman1/> This speed was attained on trials but the trial horsepower was only {{convert|8814|ihp|lk=on|abbr=on}}.<ref name=Friedman1/> As with other contemporary Navy Department designs, sails were fitted but soon removed. ''Philadelphia'' carried 525 tons of coal for a designed range of {{convert|6354|nmi|lk=on|abbr=on}} at {{convert|10|kn|abbr=on}}.<ref name=Friedman1/>

The ship's 6-inch guns were converted to [[quick-firing gun|rapid-firing]] in 1898.<ref name=Register1/> All armament was removed when ''Philadelphia'' was converted into a receiving ship in 1904.<ref name=Register1/>