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 top water, oil, and bottom water temperatures against miles run under specific test conditions.
| Identifier | ExFiles\Box 29\3\ Scan208 | |
| Date | 2nd July 1938 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"/m 7 1/2"/m RAD. NO BONNET VENTILATION. Ats TEMP. 24°C. | ||