Brotherhood-Ricardo
See Harry Ricardo and Peter Brotherhood Ltd
By 1934 The Brotherhood-Ricardo diesel engine was available
1937 The Brotherhood-Ricardo high speed heavy oil engine was made by Peter Brotherhood Ltd in a range of sizes from 40 to 500 bhp.[1]
1943 Large sleeve valve diesel engine - Brotherhood-Ricardo. Exhibit at Anson Engine Museum.
1944 Advert for Brotherhood-Ricardo diesel engines 40-500 bhp with 2-8 cylinders. [2]
1945 Advert for steam engines and turbines. Brotherhood-Ricardo high-speed sleeve valve oil engines. [3]