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).
Inquiring about using copper-plating to prevent nitrifying hardening on specific parts, particularly the thread of valve gear cam followers.
| Identifier | WestWitteringFiles\T\2July1928-December1928\ Scan226 | |
| Date | 22th November 1928 | |
| BY.{R.W. Bailey - Chief Engineer} ) (Struck through) HS.{Lord Ernest Hives - Chair} ) FROM R.{Sir Henry Royce} ORIGINAL R1/M22.11.28. NITRIFYING HARDENING. +4469 +7090 +7060 (Struck through) In the above process can parts be treated so that they do not harden, say by copper-plating? The valve gear cam followers must not be hardened on the thread. R.{Sir Henry Royce} | ||