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 alternative materials, like nickel chrome steel, for an annulus and planet gear due to breakage concerns.
| Identifier | WestWitteringFiles\B\August1918\ Scan2 | |
| Date | 19th August 1918 guessed | |
| To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} -2- R8/C13818 Contd. Regarding the case hardening of the annulus, should this be thought to be treacherous, we could test making some in nickel chrome, or similar steel, which would wear well, heat treated to a high Brinnel before finishing. I think it would be quite good, if reasonably convenient, to make a few and test them, say three, and also test the large planet gear in the same material, if it is thought that the teeth of this is the cause of the breakage. R.{Sir Henry Royce} | ||