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).
The material and stress treatment for big end bearings on a Bentley Chassis.
| Identifier | ExFiles\Box 115\1\ scan0228 | |
| Date | 21th December 1936 | |
| 1020 To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}3/AP.21.12.36. BENTLEY CHASSIS - BIG END BEARING MATERIAL. With reference to By/EM.32/MN.17.12.36. regarding the particulars about the material which has been used in making the Experimental RR.56. big end bearings, we have been given the following information by HPS{Horace Percy Smith - Experimental Factory Mgr}/Hall., who has had the handling of these bearings. The material was extruded bar supplied by Messrs. Reynolds. The bearings received a stress release treatment before grinding of 160° - 170° for 6 hours. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||