68-Pounder Lancaster gun

68-Pounder Lancaster guns were a rifled muzzle-loading cannon that fired a 68 pound shell. They were fitted in pairs to the Arrow-class gunvessel

Arrow class gunvessel

The Arrow class comprised six second-class screw-driven vessels built as despatch vessels for the Royal Navy in 1854, mounting 6 guns. In 1856 they were redesignated as second-class gunvessels.-Design:...

. The cannon was designed with an oval bore and had a range of about 6500 yards. The gun suffered from a tendency to burst.