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).
Super-hardening battery ignition contact breaker cams using the 'Cloudburst' process.
| Identifier | ExFiles\Box 61b\1\ scan0118 | |
| Date | 15th September 1930 | |
| X6118 EFC. c. By/RD. By12/H15.9.30. X6118 X.1019. BATTERY IGNITION CONTACT BREAKER CAMS: X.5690. HARDENED BY "CLOUDBURST" PROCESS. X.7690. Referring to the above pieces which have been super-hardened by the "cloudburst" process, I am satisfied that these represent a very material improvement over our standard process, and we intend as soon as the machine is available, which should be in the near future, to specify this treatment for these particular cams. We are returning the cams to EFC. so that they can be re-fitted to engines. By.{R.W. Bailey - Chief Engineer} | ||