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).
Slight modification to the characteristic of several units, including the distributor for I.F.F.
| Identifier | ExFiles\Box 168\3\ img222 | |
| Date | 11th July 1939 | |
| -2- RM{William Robotham - Chief Engineer}/RC.{R. Childs}9/JH.11.7.39. and by making a slight modification to the characteristic. This has already been done on several units, including the distributor for I.F.F... RM{William Robotham - Chief Engineer}/RC.{R. Childs} | ||