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).
List of possible cost-saving measures for the manufacturing of different crankshafts, with a final cost for a standard V.C.M. Wraith crankshaft.
| Identifier | ExFiles\Box 148\2\ scan0218 | |
| Date | 17th June 1939 | |
| -2- RM{William Robotham - Chief Engineer}/SWdl.{Len H. Swindell}1/MM.17.6.39. Possible economies from the following:- (1) Carbon crankshaft compared with V.C.M. saves 25/-. (2) Boring of pins and journals as at present but sealing by disc washers and not oilers would save approximately £1 (factory cost). (3) Profiling of crankshaft webs costs approximately 15/- (factory cost) which unmachined would be saved. (4) Unmachined crankshaft webs on the faces and including item (3) profiling would save 30/- (factory cost). (5) Solid crank, i.e. no oilers or boring in the pins and journals, would save approximately 5/- material + 45/- (labour = 200%) a total factory cost of 50/-. The factory cost of the standard V.C.M. Wraith crankshaft complete to LOP = £15.11.9d. RM{William Robotham - Chief Engineer}/SWdl.{Len H. Swindell} | ||