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).
Letter from the Experimental Department to A.C. Sphinx Ltd. requesting data on bye-pass oil filters.
| Identifier | ExFiles\Box 136\3\ scan0093 | |
| Date | 23th October 1940 guessed | |
| 1139 EXPERIMENTAL DEPARTMENT. Re/CTS.{C. Trot Salt - Carburation}7/EHT. A.C. SPHINX Ltd., DUNSTABLE. Dear Sirs, Will you please supply full particulars, with any available descriptive data, concerning Bye-Pass oil filters. Yours faithfully, | ||