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).
Photograph detailing thickness measurements of a bumper for 3-inch cams after a 30-hour test.
| Identifier | ExFiles\Box 95\3\ scan0206 | |
| Date | 12th December 1935 | |
| G.83836 BUMPER - 3" Cams. 30 HOURS. 12. 12. 35. THICKNESS .226 THICKNESS .211 THICKNESS .127 THICKNESS .137 THICKNESS .136 THICKNESS .226 THICKNESS .213 THICKNESS .137 THICKNESS .129 | ||