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).
Endurance testing of a hydraulic device and investigating steering tube geometry to reduce wobbling.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan12 | |
| Date | 12th June 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF:Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG9.10.25. We are testing these for endurance on the bumping rig, they would appear to be very much more reliable than any other hydraulic device we have seen. Their main objection is their bulk and weight. Their effectiveness could undoubtedly be increased by the substitution of stronger control springs. At present they have only been run at the setting recommended for comfort by Springfield. We have tried to ascertain if the geometry of the side steering tube can be improved in any way. We carried out the test by fitting a solid side steering tube and lifting one side of the car by means of a crane so that one spring was under considerable compression and the other fully extended as when wobbling. The resultant movement of the steering wheel due to the angular displacement of the side steering tube was barely perceptible. We do not therefore think that much improvement can be made in this direction. We have confirmed that a side steering tube solid in tension is not a success in eliminating wobbles on the road. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||