RS.500 valve spring failures in a Phantom III Engine Unit No.13.
| Identifier | ExFiles\Box 91\2\ scan0025 | |
| Date | 7th June 1937 | |
| 300a [red initial 'J'] To Rm. {William Robotham - Chief Engineer} from Rm {William Robotham - Chief Engineer} /IMW. {Ivan M. Waller - Head of Chateauroux} c. HPS. {Horace Percy Smith - Experimental Factory Mgr} Rm {William Robotham - Chief Engineer} /IMW. {Ivan M. Waller - Head of Chateauroux} 4/AP.7.6.37 32.EX. Phantom III. - Engine Unit No.13. RS. {Sir Henry Royce's Secretary} 500 Valve Springs. Failures were experienced on 5.6.37:- 3.B. (Exhaust No.2. cylinder B.side) 101 miles. 7.B. (Exhaust No.4. cylinder B.side) 143 miles. New RS. {Sir Henry Royce's Secretary} 500 springs were fitted after each failure, by Rm {William Robotham - Chief Engineer} /IMW. {Ivan M. Waller - Head of Chateauroux} The broken springs have been handed to Rm. {William Robotham - Chief Engineer} Rm {William Robotham - Chief Engineer} /IMW. {Ivan M. Waller - Head of Chateauroux} | ||
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).