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).
Requesting characteristic curves for rear springs and discussing variations in their design and friction.
| Identifier | ExFiles\Box 79\3\ scan0166 | |
| Date | 31th October 1913 | |
| COPY R10/P 31.10.13. To Da.{Bernard Day - Chassis Design} from R.{Sir Henry Royce} Copy to J.{Mr Johnson W.M.} Copy to Wor.{Arthur Wormald - General Works Manager} X910 COPY. Re Rear Springs. With reference to the springs fitted to the rear of our cars, I should like the characteristic curve of these plotted and sent to me, because although we give an initial set equal to 3" camber, which is equivalent to moving the axle 6" nearer the frame after the spring is in contact, the rating of this spring called by Mr. Ionides the gradient, may be different to that of an ordinary spiral spring, and if so, it would rather upset our ideas on springing, and also springs may vary, possibly in many ways, and those made with sheared ends, and also those made with sheared ends and equal thicknesses of plate may all give different characteristics and different percentages of friction. My own impression is that the springs with sheared ends are the easiest to understand, and also the spring with all the plates of one thickness, except it may be necessary to make the top plate of a different thickness for other reasons. F.H.R. See R11/P 31.10.13. springs for 2704. | ||