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 plotting water and oil temperatures against miles run during a vehicle test.
| Identifier | ExFiles\Box 92\2\ scan0077 | |
| Date | 25th June 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. 6 m/m 7 1/2 m/m RAD. NO BONNET VENTILATION. ATS TEMP. 24°C. | ||