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).
Improved lubrication scheme, bearing cap interchangeability, and the use of forged shims.
| Identifier | ExFiles\Box 114\2\ scan0267 | |
| Date | 29th September 1936 | |
| Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} By.{R.W. Bailey - Chief Engineer} Sft.{Mr Swift} [Handwritten] Rm{William Robotham - Chief Engineer} [Handwritten] By - Presume you will instruct forthwith Rm{William Robotham - Chief Engineer} With reference to the second issue raised in your memo Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/KW.26.9.36, it is agreed that the improved scheme of lubrication to the rear main bearing should be applied immediately. This scheme is to LeC.3324, and has been used during the last three years on several experimental engines with complete satisfaction. The light alloy bearing I have seen, taken from the rear end of 19.B. unit, which has done over 200 hours is in very good condition. As the rear main bearing cap is interchangeable up to a point with the front and central, we have considered whether some means are required to prevent incorrect assembly on the engine. There is none at the present time except that provided by the numbering of the caps, and I think we shall have to continue to depend on this as there will be the additional features of the oilways to provide an indication. With regard to the first issue raised, of the shims which separate the two bearing halves, it should be understood that the decision to use forged shims in R.R. alloy applies to both big-ends and journals. E.{Mr Elliott - Chief Engineer} | ||