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 crankcase housing bore dimensions for Vandervell main bearings.
| Identifier | ExFiles\Box 115\2\ scan0459 | |
| Date | 2nd May 1939 | |
| 1020 To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. By/CS. c. Da{Bernard Day - Chassis Design}/MCS. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}C/MH.{M. Huckerby}2.5.39. VANDERVELL MAIN BEARINGS. In order to use the above people's latest main bearing material we have to modify the crankcase housing bore dimensions both on the B.60 EB.4669 and the B.80 EB.4670, which at present are 2.9025 +2 dia. to 2.9105 +2 dia. This new dimension is permanent and the drawings should be altered to suit, likewise the crankcases for B.80 Nos. 5 and 6 units and B.60 Nos. 5 and 6 should be bored to this new figure 2.9105. +2 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||