| 词条 | 3"/21 caliber field gun |
| 释义 |
|name= 3 Inch / 21 Caliber Field Gun |image= |caption= |origin= United States |type=* Field gun
|is_ranged=Yes |is_bladed= |is_explosive= |is_artillery=Yes |is_vehicle= |is_UK= |service= |used_by=* US Navy
|wars= |designer= |design_date= 1874 |manufacturer= |production_date= 1875 – |number= |variants= |weight= {{convert|384|lb|kg}} |length= {{convert|69.6|in|m}} |part_length= {{convert|64.3|in|m}} bore (21 calibres) |width= |height= |crew= |cartridge= {{convert|13|lb}} (projectile) |caliber= {{convert|3|in|mm|sing=on}} |action= |rate= 8 – 9 rounds per minute |velocity= {{convert|1150|ft/s|m/s}} |range= {{convert|5,000|yd}} at 19.5° elevation |feed= |sights= |breech= Fletcher breech mechanism |recoil= hydraulic recoil piston |carriage= Wheeled |elevation= |traverse= }} The 3"/21 caliber gun (spoken "three-inch-twenty-one-caliber") was a field gun for United States Navy and United States Marine Corps. They were a simple horse-drawn artillery gun that were mostly used by the Marines. The guns have also been described as Boat Guns but information on type of mounts has not been found.[1] DescriptionThe Mark 1 was intended as a support gun for landing operations. It was of simple monobloc construction with a Fletcher breech mechanism with down swinging carrier, and used an hydraulic recoil piston that was screwed onto the gun directly. It most likely used bagged ammunition with a {{convert|13|lb}} projectile at a velocity of {{convert|1150|ft/s}}. Range was {{convert|5000|yd}} at 19.5 degree s of elevation.[1] Surviving piecesGuns No. 5 and 6, built in 1875, had been restored and were located in St. Clair, Pennsylvania as of 2004.[1] References1. ^1 2 {{cite web |url=http://www.navweaps.com/Weapons/WNUS_3-21_mk1.htm|title=United States of America 3"/21 Field Guns 3"/21 (7.62 cm) Mark 1 |publisher=Navweaps |date=3 December 2006 |accessdate=25 May 2016}} External links{{Use dmy dates|date=June 2017}}{{DEFAULTSORT:3 21 caliber gun}}{{artillery-stub}} 3 : Naval guns of the United States|76 mm artillery|Artillery of the United States |
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