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).
Fitment of bearing caps on a Wraith crankcase.
| Identifier | ExFiles\Box 132\3\ scan0087 | |
| Date | 15th February 1938 | |
| BY/NS.{Norman Scott} BY/CS. c. RHC{R. H. Coverley - Production Engineer}/SB.{Mr Bull/Mr Bannister} c. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Files 616. BY.4/G.15.2.38. Swdl{Len H. Swindell} WRAITH - CRANKCASE. RE: BEARING CAPS. The Works would prefer not to have accurate fits on both the overall width of the caps measured transversely to crankshaft axis and the spigot dimension of the studs on the spigotting diameter. I have given this matter some thought, and am satisfied that we must maintain a close fit between the caps and the crankcase, and if this is done we can afford to make the spigotting portion of the studs in the caps .004 positively clear on diameter with a limit of .001. I think this proposal will be a practical solution. 134 BY.{R.W. Bailey - Chief Engineer} | ||