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).
The mileage completed by various units on a solid rocker mechanism.
| Identifier | ExFiles\Box 158\4\ scan0193 | |
| Date | 2nd November 1937 | |
| 1360 File To Rm.{William Robotham - Chief Engineer} 2.11.37. We give below the mileage completed to date on solid rocker mechanism. 32-EX No.13 unit in France 16,088 35-EX No.16 unit in England 4,472 37-EX No. 9 unit in England 2,941 Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||