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 and bottom water temperatures against various bonnet and shutter configurations.
| Identifier | ExFiles\Box 64\1\ scan0075 | |
| Date | 25th June 1931 guessed | |
| GRAPH III. STANDARD REAR BONNET SHUTTERS OPEN. FRONT UNDERSHIELD OFF FRONT BONNET SHUTTERS OPEN. ALL SHUTTERS OPEN. LOUVRED BONNET LOUVRED BONNET FRONT FAN OFF. TOP WATER TEMP. BOTTOM WATER TEMP. 85° 80° 75° 70° 65° SPEED 62 M.P.H. ATS. TEMP 20°C. 19 E.X. 14 x 52 AXLE. WT. 48 CWT. EMPTY. STANDARD 6 m/m 7 1/2 m/m TUBES. MATRIX AREA CAR RUN UNTIL TEMPS BECOME STABILISED. | ||