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).
List of modifications concerning engine controls and water supply pipes.
| Identifier | ExFiles\Box 97\1\ scan0215 | |
| Date | 16th September 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/CTS{C. Trot Salt - Carburation}1/R.16.9.38. E.C.D.617/8. Engine controls, mixture control is now deleted. Throttle control modified by E.C.D. 877. E.C.D.165. Water supply pipes to hot spots - otherwise see E.C.D. 758. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} | ||