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).
Manufacturing processes for road springs, including grinding, eye construction, and plating.
| Identifier | ExFiles\Box 154a\4\ scan0036 | |
| Date | 18th January 1937 | |
| To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} c. Roy.{Sir Henry Royce} c. Hs.{Lord Ernest Hives - Chair} 1306 Rm{William Robotham - Chief Engineer}/Les.22/AP.18.1.37. ROAD SPRINGS. Re Roy{Sir Henry Royce}/Dn.6/ME.6.1.37. We think machine grinding should be deleted on Phantom III. The 25.HP. springs which are higher stressed have never been machine ground. We should also like to know the saving in cost by having rolled eyes on Bentley springs. The solid eye was originally adopted owing to Woodhead's small extra cost for it. Firth's never can produce solid eyes cheaply. We think Cadmium plating is necessary, as we save considerable weight by using higher stressed springs compared to other manufacturers. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | ||