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).
Confirming views on main bearing and con rod lubrication for aero and car engines.
| Identifier | ExFiles\Box 13\8\ 08-page6 | |
| Date | 10th February 1933 | |
| COPY To R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} Rg.{Mr Rowledge} Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} Hy.{Tom Haldenby - Plant Engineer} X 7030 E.5/HP.10.2.33. X.5030. X.7030. X.3992. X.3859. Aero and Car Engines. LUBRICATING GROOVES. This memo is to confirm that your views with regard to main bearing and con rod lubrication, as understood by me during the last three years, are as shown on the first and last diagrams of DES.1038 (blueprint attached) referring to the SS.{S. Smith} Chassis and future Falcon Engines respectively. The side grooves in the main bearings in combination with three holes through the crank journal at 120° ensure a constant flow of oil to the interior of the shaft. The crankpin with a single lubricating hole at right angles to the crank on the leading side acts as a dirt separator and admits oil at the point of lowest bearing pressure in advance of the application of the load. The lubricating holes in the big end bearing are so placed as to avoid relieving the pressure and scraping off oil where the load is heaviest. In the case of a bladerod four oil feed holes and no grooves in the big end block or blade rod. During the early part of 1928 we passed through a period of grooveless bearings and modified oil feeds on both aero and car work to reduce oil spray and heat to oil. Diagram No.5 shows what we are at present using. E.{Mr Elliott - Chief Engineer} | ||