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).
Ordering annular rings of forged carbon steel for manufacturing Phantom III brake drums.
| Identifier | ExFiles\Box 92\4\ scan0270 | |
| Date | 17th December 1936 | |
| 306 Roy.{Sir Henry Royce} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} c.c. to O/JWH. c.c. to E.{Mr Elliott - Chief Engineer} c.c. to HPS.{Horace Percy Smith - Experimental Factory Mgr} Rm{William Robotham - Chief Engineer}/AFM{Anthony F. Martindale}3/R.17.12.36. STEEL BRAKE DRUMS FOR P.III. Will you please order 4 of each of the follow- ing sizes of annular rings in 0.5% forged carbon steel. 12 1/4" inner dia. x 19 1/4" outer dia x 5 1/4" 12 1/2" " " x 19" " " x 4 1/4" This will enable us to fit two Phantom III cars with steel drums if there is no scrap. On receipt of these drums we shall heat treat them to give a Brinell of 300-350 and machine them to drawings G.84797/8. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||