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).
Modification of a B.60 crankcase, including boring out bearing housings and supplying a new main bearing.
| Identifier | ExFiles\Box 124\2\ scan0323 | |
| Date | 12th July 1941 | |
| To: HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} 1094 Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}1/RH.{R. Hollingworth}12.7.41. B.60 Crankcase. Confirming your agreement with Rm.{William Robotham - Chief Engineer} that you would bore out the bearing housings of B.60 No.2, top half crankcase. We send you herewith EB.4669 to which the housings should be machined with bearing caps RE.185-6-7-8 in position. At the same time, can you please supply one new centre main bearing to your drawing EX.36325-6. The latter becomes necessary as a flanged bearing, to take the place of Vandervell thrust washers, which cannot be used when the case is bored out. This complete modification was carried out by you on B.60 No.1 unit, about a year ago, and this engine has been operating satisfactorily in the Bentley lorry ever since. It is being worked all day and every day under most severe conditions than if the engine were in a normal chassis. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} | ||