Anson Engine Museum

Mirrlees designed 'Ricardo' sleeve valve engines, one type having a bore of 5.5 inches and a stroke of 6.5 inches, developing 20 BHP per cylinder at 900 r.p.m., and the other with a bore of 17 inches and stroke of 21.5 inches, developing 50 BHP per cylinder at 200 r.p.m.