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).
Page two of a letter regarding the avoidance of failure in the use of a ballast.
| Identifier | ExFiles\Box 53\3\ Scan126 | |
| Date | 12th September 1927 | |
| Oy13-E-91227 -2- September 12, 1927. outside to be highly satisfactory and to avoid the possible cause of failure involved in the use of a ballast, Yours very truly, Maurice Olley MO/E | ||