Test results for oil consumption on Unit U7S with standard piston and rings.
| Identifier | ExFiles\Box 144\3\ scan0072 | |
| Date | 8th July 1936 | |
| To Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} X1220 Hs {Lord Ernest Hives - Chair} /WB. {Mr Brazier / Mr Bell} 9/JH. 8.7.36. 18-G-IV Oil Consumption. - Unit U7S: Standard Piston and Rings. Total mileage to date 6253. Miles run 201 Average speed 42 Oil used 5¾ pts. Oil cons. 281 m.p.g Petrol Cons. 12.6 m.p.g. Average Air Temp. 21°C. " oil " 75°C. " Water " 85°C. " press. sq/lb. 28 Hs {Lord Ernest Hives - Chair} /W. Brazier. | ||
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).