35ft 6in Self-righting motor-class lifeboat

	Cyril and Lillian Bishop (ON740) on display at Hastings, 2020
Class overview
Name	35ft 6in Self-righting motor-class
Builders	J. Samuel White, Cowes; S. E. Saunders, Cowes; Saunders-Roe, Cowes; J. I. Thorneycroft, Chiswick; Rowhedge Ironworks, Rowhedge; Groves & Guttridge, Cowes;
Succeeded by	Liverpool-class
Cost	£3,000- £14,000
Built	Single engine: 1921–1940; Twin engine: 1947–1950;
In service	Single engine: 1921–1963; Twin engine: 1947–1965;
Completed	Single engine: 25; Twin engine: 5;
Lost	2
Retired	24
Preserved	3
General characteristics
Displacement	Single engine: 5–6 long tons (5.1–6.1 t); Twin engine: 8–9 long tons (8.1–9.1 t);
Length	35 ft 6 in (10.82 m)
Beam	8 ft 10 in (2.69 m)-9 ft 10 in (3.00 m)
Draught	2 ft 8 in (0.81 m)
Propulsion	Single engine: 35-bhp Weyburn AE6 6-cyl. petrol; Twin engine: 18-bhp Weyburn AE4 4-cyl. petrol/20-bhp Ferry FKR.3 3-cyl. diesel;
Speed	8 knots (9.2 mph; 15 km/h)
Crew	7/8

The 35ft 6in Self-righting motor-class was a 10.8 m displacement hull lifeboat built in single engine form between 1921 and 1940 and in twin-engined form between 1947 and 1950. The boats were operated by the Royal National Lifeboat Institution (RNLI) between 1921 and 1965.