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).
Temporary modification for B.60 & B.80 crankshafts due to issues with the harmonic damper.
| Identifier | ExFiles\Box 123\5\ scan0217 | |
| Date | 6th December 1938 | |
| 1044 also 1116 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}2/MH.{M. Huckerby}6.12.38. B.60 & B.80 CRANKSHAFTS. In view of the trouble we have experienced with the harmonic damper on the above unit will you please leave all the cranks which are at present unmachined, unmachined at the nose end, that is, forward of the front main journal. The object of the above is to cater for our normal spring drive as used on Wraith etc. until such time as the harmonic damper with solid pinion is made satisfactory. By/Ald.{F. Allwood - Experimental Design} is producing a scheme to adapt the spring drive. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||