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).
Proposal for an experimental scheme to test a balancing cam on an existing Bentley engine.
| Identifier | ExFiles\Box 10\3\ 03-page091 | |
| Date | 28th October 1937 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} 654 Rm.{William Robotham - Chief Engineer}8/AP.28.10.37. SKETCH P.D.39. Herewith a rough Experimental scheme for marking up a balancing cam on an existing Bentley engine. The whole object of the test is to see if the long leaf spring starts thrashing when it is hit by the cam at natural frequency. It is obviously unnecessary to grind the cam. If it functions satisfactorily it would merely be punched out of sheet metal for production. We should be glad if you would make the necessary parts and rig them up on a test bed engine. Rm.{William Robotham - Chief Engineer} | ||