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).
Specifying the nitriding temperature and duration for experimental miniature crankshafts.
| Identifier | ExFiles\Box 63\4\ scan0138 | |
| Date | 5th February 1931 | |
| X 4499. Rg.{Mr Rowledge} c. to By.{R.W. Bailey - Chief Engineer} c. to Hs.{Lord Ernest Hives - Chair} c. to By/Hm.{Capt. W. Hallam - Head Repairs} c. to WHC. Roy{Sir Henry Royce}/Dn2/BH5.2312 RECEIVED 5 FEB 1931 HS{Lord Ernest Hives - Chair} Please note that we are informed by the English Steel Corporation Ltd. that the temperature at which the Experimental Miniature Crankshafts should be Nitrided is 450° c. the parts being maintained at this temperature for 72 hours. Roy.{Sir Henry Royce} S | ||