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).
Requesting the production of trial B.60 and B.80 camshafts to address poor idling issues, with specific timing details.
| Identifier | ExFiles\Box 124\1\ scan0001 | |
| Date | 2nd March 1939 | |
| 1044 To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}2/MH.{M. Huckerby}2.3.39. B.60 & B.80 CAMSHAFTS. Will you please make 2 off each of the following cam-shafts for trial in view of poor idling on 29.G.VI. with the B.60 engine. B.60. Exhaust cam to lead its respective inlet by 113°-15' otherwise camshaft as EB.4268, i.e. Inlet form EB.4020, Exhaust, EB.4019. B.80. As for B.60 but otherwise as EB.4512. The timing for the above camshafts with .030 clear-ance is IO 10° PTDC. EO 45°BBDC. IC 31° PBDC. EC 7°BTDC. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||