Change in material specification for inlet valve seats on B 60 and B. 80 units.
| Identifier | ExFiles\Box 123\5\ scan0314 | |
| Date | 22th February 1939 | |
| 1044 To BY. {R.W. Bailey - Chief Engineer} c. BY {R.W. Bailey - Chief Engineer} /CS. c. Da {Bernard Day - Chassis Design} /Jnr. {Charles L. Jenner} c. Da {Bernard Day - Chassis Design} /Mc's c. HPS. {Horace Percy Smith - Experimental Factory Mgr} Rm {William Robotham - Chief Engineer} /Swdl {Len H. Swindell} 9/ER 22.2.39. B 60 and B. 80 Units. Will you please alter the specification of the inlet valve seats from N/MC to S 65. The former is an expensive material and is very difficult to machine and the latter is considerably cheaper, both as a material and a machineable job. An appreciable amount of running has been carried out on S 65 as a valve insert, and has been found to be quite satisfactory. All future units should be fitted with S 65 material seats unless otherwise stated. Rm {William Robotham - Chief Engineer} /Swd. | ||
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).