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).
Oil consumption, air/oil temperatures, and average speed over three sets of test runs.
| Identifier | ExFiles\Box 144\3\ scan0318 | |
| Date | 17th March 1939 | |
| -2- Rm{William Robotham - Chief Engineer}/WB.{Mr Brazier/Mr Bell}2/JH.17.3.39. A.{Mr Adams} Oil Cons. Av. Air Temp. Av. Oil Temp. Av. Speed. 1st. run. 1244 m.p.g. 5°C. 72°C. 43.2 m.p.h. 2nd. run 1584 5°C. 70°C. 42.4 m.p.h. 3rd. run. 1584 13°C. 78°C. 44.1 m.p.h. 4th. run. 1760 9°C. 74°C. 43.8 m.p.h. Average 1543 8°C. 73°C. 43.4 m.p.h. .......... B. 1st. run. 1077 m.p.g. 9°C. 74°C. 43.2 m.p.h. 2nd. run. 1440 7°C. 72°C. 43.1 m.p.h. 3rd. run. 1400 7°C. 73°C. 43.8 m.p.h. 4th. run. 1208 10°C. 75°C. 43.2 m.p.h. Average. 1281 8.25°C. 73°C. 43.3 m.p.h. .......... C 1st. run. 1385 m.p.g. 13°C. 78°C. 44.4 m.p.h. 2nd. run. 1935 m.p.g. 12°C. 76°C. 43.9 m.p.h. 3rd. run. 1576 10°C. 77°C. 44.5 m.p.h. Average 1632 m.p.g. 11.6°C. 77°C. 44.3 m.p.h. .......... | ||