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).
Considering the production cost of a carbon steel brake drum liner for Bentley Aluminium Brake Drums.
| Identifier | ExFiles\Box 85\1\ scan0259 | |
| Date | 14th November 1936 | |
| 206 To Rm.{William Robotham - Chief Engineer} from G/Rb.{R. Bowen} G/Rb.{R. Bowen}18/M/70/W.191136. Bentley Aluminium Brake Drums Martindale Section 6170. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}12/AP.14.11.36. We have considered the question of making the Brake Drum Liner G.2404 in carbon steel by the method of rolling a flat strip and welding the joint etc., and are of the opinion that this method of production will show an increase in factory cost of approximately 1/9 over the millenite cast pot method. G/Rb.{R. Bowen} | ||