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 of engine oil, water, and air temperatures recorded at a constant speed.
| Identifier | ExFiles\Box 91\4\ scan0253 | |
| Date | 6th July 1935 | |
| 6th July 1935 70.MPH READING EVERY MILE @ 70 M.P.H. E.S. TEMPERATURES RADIATOR Grille OFF. Grille ON. 110° ENGINE OIL. 100 90° WATER. 80° 70° 60° 50° 40° AIR. 30° 20° | ||