QF 6-inch naval gun
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The QF 6-inch 40 calibre naval gun was used by many United Kingdom-built warships around the end of the 19th century and the start of the 20th century. In British service it was known as the QF 6-inch
Typical naval deck mounting. An early long cartridge case for gunpowder propellant is upended at bottom left, a shell stands next to the cartridge.
Loading a MK I or II deck gun on HMS Ariadne. The man at left holds a shell, the men at right hold brass powder cartridges. Note the coned breech screw and lugs on the underside of the breech ring to which recoil cylinders are attached
MK III gun at Fort Nelson. This shows the left trunnion (detailed in black) by which it is mounted on a Vavasseur recoil slide, and there are no lugs on the underside of the breech ring
The 6 starboard casemate guns on HMS Powerful
Board of Fortifications
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Several boards have been appointed by US presidents or Congress to evaluate the US defensive fortifications, primarily coastal defenses near strategically important harbors on the US shores, its terri
Board of Fortifications report, 1886
Endicott Period battery with two guns on disappearing carriages
10-inch disappearing gun at Battery Granger, Fort Hancock, New Jersey
Fire control searchlight at Fort Baker, California