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 engine component specifications including valves, crank damper, and ignition parts.
| Identifier | ExFiles\Box 83\1\ scan0300 | |
| Date | 20th November 1936 | |
| -2- Rm{William Robotham - Chief Engineer}5/R.20.11.36. (5) Less costly inlet valves. (6) Lightened increased inertia crank damper. (7) Delco remy ignition coils. (8) Porcelain spark plugs. (9) Ignition cut out RR. Sch. 845. Rm.{William Robotham - Chief Engineer} | ||