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).
Instruction to modify a standard Bentley crankshaft by drilling additional holes to improve bearing lubrication.
| Identifier | ExFiles\Box 85\5\ scan0125 | |
| Date | 8th January 1937 | |
| 217. To HPS.{Horace Percy Smith - Experimental Factory Mgr} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}12/JH.8.1.37. BENTLEY CRANKSHAFT. Will you please instruct that a standard crank be drilled in the following manner for experiment on improving the bearing lubrication. Instead of the existing single hole .218 dia. in each crankpin 4 holes .125 dia. to be drilled equally spaced, one hole should be in the same position as the existing single hole. An extra and oposite hole to be drilled same diameter as existing standard, in each crankshaft journal. Rm{William Robotham - Chief Engineer}/L.M.Swindall. | ||