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 three engineering modifications concerning hand control, coil, and camshaft.
| Identifier | ExFiles\Box 101\3\ scan0068 | |
| Date | 1st June 1937 | |
| (3) Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe}5/JH.1.6.37. 2. Reduction in range of hand control or delete altogether. 3. Delco or new type R.R. coil D.{John DeLooze - Company Secretary}/5673 with resistance. 4. Camshaft altered to suit .010 inlet and .015" exhaust. Rm{William Robotham - Chief Engineer}/G.Ratcliffe. | ||