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).
Experimental record sheet for battery ignition cams hardened by the 'Cloudburst' process.
| Identifier | ExFiles\Box 61b\2\ scan0128 | |
| Date | 3rd September 1930 | |
| ELECTRICAL EXPERIMENTAL RECORD SHEETS. Battery ignition cams hardened by the "Cloudburst" process. Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered | Total miles. 31-10-29 | 22 EX | | Fitted to 22 EX | 19,189 | | | 3-12-29 | " | | " | | 20565 | 1376 | 1376 5-2-30 | " | | " | | 23273 | 2708 | 4084 17-3-30 | " | | " | | 24865 | 1592 | 5676 5-5-30 | " | | " | | 25780 | 915 | 6591 3-6-30 | " | | " | | 26606 | 826 | 7417 5-7-30 | " | | " | | 27918 | 1312 | 8729 11-8-30 | " | | " | | 29690 | 1772 | 10,501 3-9-30 | lab | | Cam removed and examined. Handed to BY for inspection. | | | | | ||