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).
Crankshaft dampers on B.60 and B.80 engines, discussing different types and development history.
| Identifier | ExFiles\Box 124\2\ scan0043 | |
| Date | 14th February 1940 | |
| 1044 File To Rm{William Robotham - Chief Engineer}: c. to Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. to Rm{William Robotham - Chief Engineer}/CIS. c. to Rm{William Robotham - Chief Engineer}/JRS. c. to EV{Ivan Evernden - coachwork}/HH. Ev.{Ivan Evernden - coachwork}3/JH.14.2.40. CRANKSHAFT DAMPERS ON B.60 & B.80 ENGINES. Attached herewith is a print of PL.103 of which you have already had advanced copies showing the history of the crankshaft damper development work both on the B.60 and B.80 cast iron engine of the Senior range. Since we are no longer interested in the twin belt arrangement, dampers with this tie-up are not included neither is the early Buick type damper which failed due to over-stressed springs and bearing seizure. There are two crankshaft noses for each engine, the spring driven pinion calls for the shaft to be different from the one that suits all the other types. On the Buick, I refer to "Natural Damping" which is the friction between the laminated springs, there being no additional friction device. Ev.{Ivan Evernden - coachwork} | ||