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).
Diagram illustrating the present and correct positions for S.S. Radiator Overflow Pipes, showing water levels at different temperatures.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan184 | |
| Date | 14th April 1920 | |
| S.S. RADIATOR OVERFLOW PIPES. CORRECT POSITION PRESENT POSITION. 3" 1/4" A B C D A.B:- WATER LEVEL AT 80°C. C.D:- EQUIVALENT LEVEL AT 15°C AHF 14.4.20 | ||