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).
Graph showing the temperature of top water, bottom water, and oil against miles run.
| Identifier | ExFiles\Box 14\7\ Scan018 | |
| Date | 2nd July 1930 guessed | |
| GRAPH I TEMP. C° 90° 80° 70° 60° MILES RUN 5 10 15 20 TOP WATER OIL BOTTOM WATER 19 E.X. 14 x 52 AXLE. 62 M.P.H. 6m/m 7 1/2 m/m RAD. NO BONNET VENTILATION. ATS TEMP. 24°C. | ||