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).
Steering efficiency, wear, and leverage.
| Identifier | ExFiles\Box 22\1\ Scan239 | |
| Date | 6th April 1925 | |
| R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF Hsl/LG6.4.25. We have now an arrangement by which we can measure the effort on the steering wheel so that we shall be able to arrive at the efficiency of the steering when mounted on the actual car being driven along the road. We have examined the steering which has completed 10,000 miles on 98-NK car in France. The part that shows heavy loading is the long plain bearing on the rocking shaft. This shows distinct signs of being tight and short of lubrication. During the tests in France, the bolts gripping the steering to the bracket were tightened several times. It may have happened that when tightened they actually tightened this bearing on the shaft. There is a certain amount of wear on the worm; more than one would expect from a perfectly lubricated job but there are no other signs of anything having been binding. The conditions of the car running in France, of course, would not be the conditions under which the steering is stiff. The steering leverage and its variation has been determined for the EAC 'V' series and Hispano cars. The method employed was to observe the angular displacement of the stub axles for movement of the steering wheel. Curves are appended showing the velocity ratio or leverage of these steering gears for different positions of the steering wheel. It will be noted that our experimental results for the EAC. 'V' series approximate very closely to the calculated results given for N.Sch.1968. Another curve is given which shows the percentage increase of leverage of the Hispano. Hs.{Lord Ernest Hives - Chair} | ||