From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Comparison of two oil consumption tests for the 21-G-IV engine with different piston ring and connecting rod setups.
| Identifier | ExFiles\Box 144\3\ scan0110 | |
| Date | 24th August 1936 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X 1220 Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies}9/JH.24.8.36. 21-G-IV Oil Consumption Tests. Previous Report 7.8.36. 22.8.36. 1. middle L shaped ring fitted. As previous with connecting rod, oil holes filled up. Average oil temp. 82.4°C. Average oil temp. 77°C. " water " 82.2°C. Average water " 81.5°C. " Air " 16.5°C. " air " 20°C. " speed 49 M.P.H. " speed 44.4 MPH Oil consumption 914 M.P.G. Oil consumption 1,110 MPG Hs{Lord Ernest Hives - Chair}/F.Dodd. | ||