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).
Request to manufacture inertia rings for trial on B.60 and B.80 units to address crankshaft vibrations.
| Identifier | ExFiles\Box 123\5\ scan0275 | |
| Date | 4th February 1939 | |
| 1044 To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}5/MH.{M. Huckerby}4.2.39. CRANKSHAFT VIBRATIONS. (B.60 & B.80). Will you please make the following inertia rings for trial on the above units. B.60 - 2 Off - 5.25" inside diameter 8" outside " .5" thickness " B.80 - 2 off - 5.25" inside diameter 8" outside " .875 thickness S/M.{Mr Moon / Mr Moore} These rings should be turned on the rim to spigott and centralise on the existing damper flywheel. They should be fastened to the front face of the existing damper wheel by means of studs, at present used for extraction of the damper. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||