Liverpool-class lifeboat

	Former Clovelly, twin engined RNLB William Cantrell Astley (ON 871)
Class overview
Builders	Groves and Guttridge of Cowes; Thornycroft of Chiswick; J. Samuel White of Cowes; Saunders-Roe of Cowes; Morgan Giles of Teignmouth; Rowhedge Ironworks of Rowhedge;
Operators	Royal National Lifeboat Institution
Succeeded by	Oakley
Built	Single engine: 1931–1941; Twin engine: (1940), 1945–1954;
In service	1931–1992
Completed	Single engine: 28; Twin engine: 32;
Retired	60
General characteristics
Type	Motor lifeboat
Displacement	6–8 tons
Length	35 ft 6 in (10.82 m)
Beam	single: 10 ft (3.0 m) – 10 ft 3 in (3.12 m) ; twin:10 ft 8 in (3.25 m);
Propulsion	single engine:; 1 x 35 hp (26 kW) Weyburn AE6 6-cyl. petrol; 1 x 47 hp (35 kW) Parsons Porbeagle 4-cyl. diesel; twin engine:; 2 x 18 hp (13 kW) Weyburn AE4 4-cyl. petrol; 2 x 20 hp (15 kW) Ferry Kadenacy FKR3 3-cyl. diesel; 2 x 32 hp (24 kW) Perkins 4.107 4-cyl. diesel;
Speed	6.5–7.5 knots (12.0–13.9 km/h; 7.5–8.6 mph)
Range	70–120 nautical miles (130–220 km; 80–140 mi)
Crew	7

The Liverpool-class motor lifeboat was a non-self-righting lifeboat operated by the Royal National Lifeboat Institution (RNLI) from its stations around the coast of the United Kingdom and Ireland. The boats were designed for carriage launching and were developed from the Liverpool-Class Pulling and Sailing type of lifeboats. There were two types built, single and twin engined.