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).
Testing of Bentley valves for failures and cracks.
| Identifier | ExFiles\Box 100\3\ scan0156 | |
| Date | 6th May 1937 | |
| To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} GWH{George W. Hancock - Head Chateauroux} Kingsbury. 6th May, 1937. Bentley. Valve Failures. We have tested valves out of two cars since receiving your memo and cannot find any traces of cracks. A system has been established to watch the valves closely. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||