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).
Process for altering Phantom III clutch springs.
| Identifier | ExFiles\Box 93\3\ scan0413 | |
| Date | 16th March 1938 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}11/JH.16.3.38. PHANTOM III CLUTCH SPRINGS. ? 312 Please cancel Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}8/MH.{M. Huckerby}14.3.38. which calls for new springs Rm.{William Robotham - Chief Engineer}31/2. and instead alter standard 24 springs G.82591 as follows - Anneal in salt bath to 700°. Close in 12 to 2.282 free length Rm.{William Robotham - Chief Engineer}31. 2.214 Rm.{William Robotham - Chief Engineer}32. Heat to 800° - 810°. Quench in oil. Temper 300° - 350°. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||