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).
The analysis and experimental use of special metal piston rings from Joseph Stubbs Ltd.
| Identifier | ExFiles\Box 37\2\ scan 161 | |
| Date | 22th October 1917 | |
| To O.O. from EFC. c. to By.{R.W. Bailey - Chief Engineer} EFC5/T22.10.17. X.3135 - PISTON RINGS IN SPECIAL METAL BY MESSRS. JOSEPH STUBBS LTD. Herewith please receive copy of Mr. Hall's analysis and remarks on the sample piston ring which was sent to us by the above firm. We have also received a pot casting E.9098, and Mr. Coverley has been instructed to make up a number of our present standard piston rings from this for experimental purposes on an engine. EFC, | ||