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 maximum internal diameter for skimmed Phantom II and Phantom III brake drums.
| Identifier | ExFiles\Box 120\1\ scan0240 | |
| Date | 1st November 1937 | |
| To Hd.{Mr Hayward/Mr Huddy} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} c. to By.{R.W. Bailey - Chief Engineer} 1028 Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}2/AP.1.11.37. Phantom II. Brake Drums. With reference to Hd{Mr Hayward/Mr Huddy}/Sd.11/HR.18.10.37. we think the internal diameter after skimming should not exceed 16.050" i.e. .025" cut. Part of the drum is only .200" thick. We also skim Ph.III. drums to the same dimension. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||