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).
Instructions for fitting Humber dampers on B.60 engines, specifying parts and friction load.
| Identifier | ExFiles\Box 124\2\ scan0158 | |
| Date | 4th May 1940 | |
| 1044 HPS{Horace Percy Smith - Experimental Factory Mgr}/RH{R. Hollingworth} from Rm{William Robotham - Chief Engineer}/JRS. Rm{William Robotham - Chief Engineer}/JRS.1/JMS.4.5.40. HUMBER DAMPERS ON B.60. The Humber dampers as fitted to B.60 engines are to be fitted with the bakelised fabric bush EXS.1886, and the two Ferodo discs supplied with the damper. The required friction load is 5 lbs. on a 10 inch radius arm at present. This may be produced by removing three of the springs. Rm{William Robotham - Chief Engineer}/JRS. | ||