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).
Blueprint showing a side cross-section and top view of a dual induction system.
| Identifier | ExFiles\Box 147\2\ scan0088 | |
| Date | 1st January 1938 | |
| DUAL INDUCTION SYSTEM APPLN. NO. 27270/38 | ||