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).
Proposed test rig to measure the coefficient of friction in steering systems.
| Identifier | ExFiles\Box 106\3\ scan0012 | |
| Date | 7th March 1925 | |
| X5430 To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to CJ. BY.{R.W. Bailey - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} R3/M3.7.25. STEERING. X. 8430 X. 5430 We are very anxious to find the instantaneous value of the co-efficient of friction, and we think a very simple rig would be an eccentric with a con. rod representing the longitudinal tube. The con. rod would have a set up spring, and the eccentric could have a suitable short stroke adjustable, so as to give a known force on the ball. A spring could be used to hold the steering wheel against the stop. The record of this spring pressure could be obtained for different speeds of the eccentric, and different boxes. Such a rig would not cost very much, and might give us some valuable inform- ation. At the same time naturally the best test will be road impressions. I am anxiously awaiting a move on this. Will DA.{Bernard Day - Chassis Design} please say what can be done with the 20 HP? Let Mr. Hardy try to get on a low efficiency nut and damped pendulum lever. R.{Sir Henry Royce} | ||