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).
Instructions for modifying Phantom III clutch springs by softening, reducing length, re-hardening and testing.
| Identifier | ExFiles\Box 93\3\ scan0419 | |
| Date | 29th March 1938 | |
| Handwritten: Actually dealt with by BY Handwritten: See BY/GRL4/E5 4-38 Handwritten: w/copy Handwritten: 312. To HPS.{Horace Percy Smith - Experimental Factory Mgr} Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}2/JH.29.3.38. PHANTOM III CLUTCH SPRING. Please take 150 clutch springs G.82591 ex stores, soften them and reduce the free length as follows ~~75~~ to 2.229. 75 to 2.301. Re-harden and test for poundage at 1.625. Those of 134 lbs. ± 6 lbs. to be painted red. " " 150 lbs. " " " yellow. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||