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).
List of points discussing improvements and design considerations for a vehicle's braking and suspension system.
| Identifier | WestWitteringFiles\K\November1923\ Scan109 | |
| Date | 12th July 1923 guessed | |
| (2) fairly well damped, and if the brake acts smoothly they should deflect and open as observed with a light braking effort, still without jaggering. (8) So then we definitely believe that it is not the spring mounting of the axle, or the operating pull rope, and we must alter the brake shoes until they act smoothly, using the standard way of mounting the axle. (9) We are designing shoes divided into three, all looking one way with equalised operation, so that they can be used either way. (10) When we get brakes consistent and smooth in action we can probably go back to original operation. (11) We are proposing to put a stiff shaft through the crankchamber, and short and equal shafts at each side of the car (i.e. each end of front axle) if experimentally proved necessary. (12) We can add to the damping of the torsional flexibility of the axle anchorage by the inverted leaves and by the placing of the shock dampers connection off centre, or using two similarly. If however the brakes themselves can be made to act smoothly then we may not require such extra damping. (13) In spite of what we hear and see of other successes by other means we are not convinced that they have a scheme which, although demonstrates fairly well, will be a success for long. We think their mechanics are imperfect, and we hear of no scheme which is also satisfactory backwards, which we consider an absolute necessity. (14) Unless there is some source of energy to set up vibration there ought to be sufficient damping in the road springs. (15) If we ease the end of the lapping shoes naturally we should expect less braking with the same operating pull. Has this operating leverage been made as high as the clearances, expansion, and wear will allow? (16) You will see by the telegram I think the brakes and shoes cannot rigidly maintain their concentricity because of the overhang flexibility. | ||