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).
Modifications and material specifications for the Phantom III A.C.9 blade connecting rod big end bearing.
| Identifier | ExFiles\Box 93\1\ scan0141 | |
| Date | 9th January 1939 | |
| Dy{F R Danby}/RS.{Sir Henry Royce's Secretary} (struck through) c. Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/Swdl{Len H. Swindell} (struck through) P 314 SWDL{Len H. Swindell} File (handwritten, File is struck through) DA.{Bernard Day - Chassis Design}5/G.9.1.39. PHANTOM 111 - A.C.9 BEARING FOR BLADE CONNECTING ROD BIG END. spec file (handwritten) As requested in Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}B/MH.{M. Huckerby}20.12.38. we send herewith :- E.CD.1138 Aluminium Bush for Blade Connecting Rod Big End. for Phantom lll. The modified blade rod can be made from standard blade rod forgings. The forked rod big end bush is the same as the standard bush E.89344 except for the reduced radii at ends of bore which are altered to suit crankshaft E.CD.284. In order to strengthen the connecting rod section at the shoulders of the bolt bosses, we have turned the existing bolts through 180° and moved the retaining slots in rod to the outer side of bosses. The forked rod big end now acts directly as a bearing on its centre diameter, for the blade rod bush and Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} suggests that this should be made in .4 carbon steel, heat treated to give a brinell of 320. Tests with normalised .4 carbon steel with a brinell of approximately 200 (for its bearing quality with AC.9 material) are being made in the Laboratory, and a final decision regarding the material for these parts will be sent out later. In the meantime, will you please detail and instruct the parts experimentally. DA.{Bernard Day - Chassis Design} | ||