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 temperature changes for top water, bottom water, and oil against miles run under specific test conditions.
| Identifier | ExFiles\Box 12\7\ 07-page086 | |
| Date | 25th June 1930 guessed | |
| GRAPH I TEMP. C° 90° 80° 70° 60° MILES RUN. TOP WATER OIL BOTTOM WATER 19 E.X. 14 x 52 AXLE 62 M.P.H. 6 7/m 7 1/2 /m RAD. NO BONNET VENTILATION. ATS TEMP. 24°C. | ||