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 with two photomicrographs examining a fracture and cracks in a chassis spring.
| Identifier | ExFiles\Box 107\3\ scan0115 | |
| Date | 31th January 1938 | |
| ROLLS-ROYCE LABORATORY REPORT: H1/EJW.S/GS. 31.1.38. M.1,521/3 x10 25/30 H.P. Chassis. Inside surface of broken eye and original fracture after cleaning. M.1,521/4 x150 Longitudinal section of spring through cracks shown in photograph M.1,521/3. Deepest crack in above photomicrograph .0115" deep. | ||