The Swallow-class sloop was a 9-gun wooden screw sloop class of four ships built for the Royal Navy between 1854 and 1857.
Built of a traditional wooden construction, the Swallow class were intended as "type of screw vessel below the Cruizer".
[1] The class were armed with a single 32-pounder gun (58 cwt) gun on a pivot mount and eight 32-pounder (25 cwt) carronades on the broadside.
Propulsion was applied through a single screw and at maximum power under steam, top speed was about 7 knots (13 km/h; 8.1 mph).
A barque rig of sails was carried, which meant the ships of the class had three masts with a square rig on the fore and main masts.