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 effect of different cooling configurations on engine water temperature.
| Identifier | ExFiles\Box 24\5\ Scan242 | |
| Date | 2nd July 1938 guessed | |
| GRAPH III. Y-AXIS: 85°, 80°, 75°, 70°, 65° X-AXIS LABELS: STANDARD REAR BONNET SHUTTERS OPEN FRONT UNDERSHIELD OFF FRONT BONNET SHUTTERS OPEN ALL SHUTTERS OPEN LOUVRED BONNET LOUVRED BONNET FRONT FAN OFF PLOT LINES: TOP WATER TEMP BOTTOM WATER TEMP ADDITIONAL TEXT: SPEED 62 M.P.H. ATS. TEMP 20°C. 19 E.X. 14x52 AXLE. WT 48 CWT. EMPTY. STANDARD 6 m/m 7 1/2 m/m TUBES. MATRIX AREA CAR RUN UNTIL TEMPS. BECOME STABILISED | ||