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).
Laboratory report comparing the microstructure of two A.C.7 bearings.
| Identifier | ExFiles\Box 115\3\ scan0146 | |
| Date | 9th December 1937 | |
| ROLLS-ROYCE LABORATORY REPORT: H1.2/RS.{Sir Henry Royce's Secretary}9.12.37. M.1500/4 X 150 Coarse structure in A.C.7 bearing from Cast B.9. M.1500/5 X 150 Structure of A.C.7 bearing from 10,000 miles test. | ||