List of future development items for the Merlin 'E' engine and their design position.
| Identifier | ExFiles\Box 30\4\ Scan006 | |
| Date | 21th September 1935 guessed | |
| ITEM. (10). DESIGN POSITION. MERLIN(Aero Engine) 'E' FUTURE DEVELOPMENT. - CONTINUED. Strengthened jacket ends. In hand. Two speed supercharger. In hand. Application of Hobson automatic boost control. In hand. | ||
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).