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).
Design of the 'Goshawk II' front axle, focusing on the choice between vertical pivots and different wheel types.
| Identifier | ExFiles\Box 49\4\ Scan096 | |
| Date | 17th February 1921 | |
| X 4263 D RECEIVED 17 FEB 1921 To DA.{Bernard Day - Chassis Design} from R.{Sir Henry Royce} Copy to... R8/G16/2/21. XL263 RE "GOSHAWK II" - FRONT AXLE. X1761 SCHEMES 752, 753, & 758. With reference to the front axle, we cannot wait to find out whether we want vertical pivots or not, since vertical pivots and wire wheels are prohibited in any case, owing to the enormous size of steel required for the wire wheel, and the amount that the hub sticks out beyond the brake. We must therefore decide on an axle suitable for the standard Rudge-Whitworth or Dunlop wheel. We presume also that a special forging will be required with vertical pivots for the disc wheels, and we think that Sales will always demand that we are able to supply two classes of wheel. This, however, is not a manufacturing advantage, and you will remember that the Siddeley-Armstrong have only disc wheels to offer, which permit of the vertical pivots, and straight forward manufacturing conditions. We must have centre point steering with pivots as vertical as possible. R.{Sir Henry Royce} | ||