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 modifications for the B.80 No.4 unit due to excessive oscillation.
| Identifier | ExFiles\Box 123\5\ scan0271 | |
| Date | 31th January 1939 | |
| 10HH also Spec. To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. By/Ald.{F. Allwood - Experimental Design} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}4/MH{M. Huckerby},31.1.39. B.80 No.4 UNIT (CRANKSHAFT). Having taken crank oscillation on B.80 NOJ unit we find the amplitude is greater than anticipated. The crank for the above unit should not be machined on the front nose end as we wish to incorporate a spring drive similar to the one schemed out for B.60. It will, however, require certain modifications and will ask By/Ald.{F. Allwood - Experimental Design} to adapt for the B.80. Otherwise the crankshaft can be made as B.80 No.3, i.e. 2.75 dia. journals and should be in .4 carbon steel. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||