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).
Re-design of the Wraith & Phantom III timing gears to omit the balancing cam.
| Identifier | ExFiles\Box 136\1\ scan0282 | |
| Date | 3rd February 1938 | |
| 1155 HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} Rm{William Robotham - Chief Engineer}/FJH{Fred J. Hardy - Chief Dev. Engineer}7/R.3.2.38. WRAITH & P.III TIMING GEARS. SCD 419/20. It has recently been decided to attempt to omit the balancing cam from the Wraith camshaft. This will involve re-designing the camshaft gear. In view of this will you please hold up work on SCD 419. We wish to proceed, however, with the P.III idler gear. Will you please make six centres Ex.S 437 - sand castings will be suitable for experimental purposes. We attach your print SCD 420. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||