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 rise of top water, oil, and bottom water over a 20-mile run.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan102 | |
| Date | 26th 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. 6m/m 7 1/2m/m RAD. NO BONNET VENTILATION. ATS TEMP. 24°C | ||