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).
Diagrams comparing failures and leaks in old and new type Phantom III oil coolers.
| Identifier | ExFiles\Box 131\5\ scan0054 | |
| Date | 6th January 1938 | |
| P III OIL COOLER TESTS DIAGRAM SHOWING FAILURES IN COOLERS OLD TYPE COOLER POSITION OF LEAK DOTTED LINE SHOWS DISTORTION NEW TYPE COOLER POSITION OF LEAK B2023 6-1-38 | ||