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).
Production of a B.60 crankshaft with integral balance weights.
| Identifier | ExFiles\Box 132\1\ scan0163 | |
| Date | 13th May 1940 | |
| HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm.{William Robotham - Chief Engineer} HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} Rm.{William Robotham - Chief Engineer}18/ML.13.5.40. B.60 CRANKSHAFT RE.869. INTEGRAL BALANCE WEIGHTS. With reference to HPS.{Horace Percy Smith - Experimental Factory Mgr}7/VS.{J. Vickers}9.5.40. since the crankshaft with integral balance weights will be forged to size and will only require to be machined where necessary in order to get the required bearing surface, producing this shaft from the existing Wraith dies would not be a useful experiment. We recommend that we produce one shaft only from the slab forging, as outlined in Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}17/ML.25.4.40. This should, of course, be machined as roughly as possible, and then balanced dynamically to simulate the conditions which will exist when it is forged to size. This, however, is some distance off. In the meantime we should like to have a shaft to take advantage of the cheapening features enumerated in Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}17/ML.25.4.40. but with bolted on weights. This should be allocated to B.60 No: 8. A similar shaft with 4 throws is required for B.40. No: 2. Rm.{William Robotham - Chief Engineer} | ||