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 heat treatment and nickel plating process for aluminium brake drums, requesting drawing updates.
| Identifier | ExFiles\Box 120\1\ scan0213 | |
| Date | 10th September 1937 | |
| 1028 To By/CRL.{C. R. Lisson} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} c. By.{R.W. Bailey - Chief Engineer} Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}4/AP.10.9.37 ALUMINIUM BRAKE DRUMS The heat treatment of aluminium cases that has proved most satisfactory is 20 hours at 230°C. The liners that have proved most satisfactory have been nickel plated, unpolished; deposit .0005 to .001" thick, before insertion into the aluminium case. The nickel on the inside is removed by the final grinding operation. Will you please alter all drawings on Ph.III., Bentley and Wraith to shew these details. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||