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).
Comparing the steering effort and components of Hispano and EAC cars against the 40/50 model.
| Identifier | ExFiles\Box 22\1\ Scan225 | |
| Date | 3rd March 1925 | |
| R.R. 493A (50m) (D.B. 173 25-9-24) J.H.D. -2- EXPERIMENTAL REPORT. Expl. No. REF hs{Lord Ernest Hives - Chair}1/LGL3.3.25. turn. We have measured the rise and fall of the axle on the Hispano car due to the inclination of the pivots, and find that it is approximately the same as the 40/50. We have also measured the effort to turn the wheels when the car is standing, and find that the Hispano requires slightly more effort than the 40/50 HP. The Hispano steering is nut and worm. The nut is whitemetal. The thread is solid whitemetal. The worm shaft is supported in bearings at the top and bottom of the steering box and the arms on the rocking shaft slide in cheeses. The nut is prevented from rotating by a flat face which bears against the rocking shaft. We have examined the EAC. steerings which have run on cars for several thousand miles. From the appearance of all the parts, the most heavily loaded bearings appeared to be those on the rocking shaft. Our tests shew that if we change the plain bearings to roller bearings and ball bearings, we make the steering freer but the 'range of effort' still remains approximately the same. We have tried the whitemetal steering nut on the EAC. We have not been able to appreciate this has made any improvement These tests have been carried out in conjunction with DA.{Bernard Day - Chassis Design} and E.{Mr Elliott - Chief Engineer} Further tests are being made experimentally with different methods of holding the steering box. HS.{Lord Ernest Hives - Chair} | ||