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).
Comparing factory cost savings for a Phantom III Main Lever Housing using different casting materials.
| Identifier | ExFiles\Box 95\2\ scan0196 | |
| Date | 11th December 1936 guessed | |
| 3A/6 To Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} from G/Rb.{R. Bowen} c.c. to RHC{R. H. Coverley - Production Engineer} [crossed out] G/Rb.{R. Bowen}8/K/72/W.8537. Les Rm{William Robotham - Chief Engineer} non Lanchester Phantom III - Main Lever Housing G83606 or 7. In connection with the suggestion to produce the above as a Die Casting and alternately as a Malleable iron casting, we have already given an estimated saving in factory cost of £4. 0. 0. per chassis set, for producing the housing as Aluminium Die Casting in place of a Mild Steel Forging (memo reference G/Rb.{R. Bowen}5/K/72/W.17437.) If the Housing is produced in a Malleable Iron casting, we estimate a saving in factory cost of approximately £2. 10. 0. per chassis set. G/Rb.{R. Bowen} [signature] | ||