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).
Testing a threaded pin to replace the silent-bloc bush at the front anchorage of the rear spring.
| Identifier | ExFiles\Box 112\1\ scan0079 | |
| Date | 8th April 1938 | |
| 846 also 446 To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/les.{Ivan A. Leslie} c. Da.{Bernard Day - Chassis Design} Rm{William Robotham - Chief Engineer}/Les.3/MH.{M. Huckerby}8.4.38. B.III AND B.50 FRONT ANCHORAGE OF REAR SPRING. We want to test a threaded pin to replace the silent-bloc bush at the front end of the rear spring. We attach a drawing of a Cadillac thread bush which appears to be very simple compared to our flanged bushes. The outside of the bush is knurled at 2 places in order to prevent the bush from moving. We have recently done some tests pressing hardened knurled shafts into round bores and find that they cut satisfactory serrations. We are told by Olley that the interference fit between the bush before knurling and the spring eye should be .007" on the diameter. We should like to test these without the expense of dirt protection by duprene washers, as the Americans do not find that dirt protection is necessary. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | ||