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).
Analysis of steering column movement and vibration, with proposals for stiffening the dash and radiator support.
| Identifier | WestWitteringFiles\S\March1928-May1928\ Scan140 | |
| Date | 30th April 1928 guessed | |
| contd :- -2- with the rubber engine isolation as might be anticipated. Other figures attached shew that the radiator very definitely throws a considerable strain on the dash as it can appreciably affect column movement. We think that the effect of shock absorbers is somewhat exaggerated in these tests due to the periodic nature of the shocks imparted by the fixed rate of revolution of the cams which sets up a forced vibration of the road springs unless dampers are fitted. Any reduction in the steering wheel and hand control weights would seem to assist materially in the solution of the problem. Summarising our impressions, we think that either N.sch.2588 or N.sch.2586 is likely to be what we want, but the previous method of holding the column where it passes through the dash which has done 9000 miles on the car at Le Cannadel and 10,000 miles on 12-EX has some advantages over that shewn. We think that it would be advantageous if a stiffener could be added from the point where the radiator support rod is attached to the dash to the transverse stiffener shewn on these schemes, thereby eliminating any dash distortion at present produced by the radiator movement. The actual optimum position and arrangement of the triangular support can relatively easily be decided during the tests in France. Attached are tabulated results of the tests. HS{Lord Ernest Hives - Chair}/En. | ||