Bramble class gunboat (1886)

HMS Lizard, c.1890.
Class overview
Name:	Bramble class
Builders:	Armstrong Mitchell Harland & Wolff
Operators:	Royal Navy
Preceded by:	Albacore class (1883)
Succeeded by:	Pygmy class
Built:	1886
In commission:	1886 - 1924
Completed:	4
General characteristics
Type:	Composite screw gunboat
Displacement:	715 tons standard
Length:	165 ft (50 m)
Beam:	29 ft (8.8 m)
Draught:	11 ft (3.4 m)
Installed power:	1,000 ihp (750 kW) (Rattler 1,200 ihp (890 kW))
Propulsion:	Triple-expansion steam engine Single screw
Speed:	10 kn (19 km/h)
Range:	2500 nm
Crew:	60
Armament:	6 × 4-inch/25-pdr QF 4 × machine guns

The Bramble-class gunboat was a class of four gunboats mounting six 4-inch guns, built for the Royal Navy in 1886. In 1887 the first three were reclassified as gunvessels.

The Bramble class was designed by William White. The ships were of composite construction, meaning that the iron keel, frames, stem and stern posts were of iron, while the hull was planked with timber. This had the advantage of allowing the vessels to be coppered, thus keeping marine growth under control, a problem that caused iron-hulled ships to be frequently docked. They were 165 feet (50 m) in length and displaced 715 tons.

Triple-expansion steam engines built by Hawthorn Leslie (Rattler), North East Marine Engineering (Wasp) and Harland & Wolff (Lizard and Bramble) provided 1,000 indicated horsepower (Rattler 1,200ihp) through a single screw, sufficient for 10 knots (19 km/h; 12 mph).

Ships of the class were armed with six 4-inch 25-pounder quick-firing guns. Four machine guns were also fitted.

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Wikipedia