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 ignition system test criteria and proposed mileage tests.
| Identifier | ExFiles\Box 154a\3\ scan0211 | |
| Date | 27th March 1936 guessed | |
| Ignition. (1) Ease of timing. (2) Durability of rubbing blocks, points, etc. (3) Coil voltage when starting. (4) Protection against rain coming in through the radiator and getting on the distributor. (5) Effect of load and wireless tests on sparking plugs. 100 hours high speed test bed work. 5,000 miles London traffic. 10,000 miles Continental high speed work. | ||