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).
Modifications to the Wraith steering to eliminate joggles by fitting weaker springs.
| Identifier | ExFiles\Box 9\7\ 07-page145 | |
| Date | 7th February 1938 | |
| 650. To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. Da.{Bernard Day - Chassis Design} c. RHC.{R. H. Coverley - Production Engineer} c. Roy.{Sir Henry Royce} Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}1/AP.7.2.38 WRAITH STEERING We found on the steering of 26.G.V1. before the car left for France that it was necessary to fit weaker springs to the rear side steering tube joint in order to obtain the desired freedom from joggles. We attribute this to increased stiffness of the new rocker-shaft in the steering gear due to its being shorter combined with a slightly increased tendency to joggle, resulting from the greater weight of the cast iron front brake drums. The springs we fitted were similar to FW.1472 except that they had one extra working coil. We suggest that a drawing of this spring should be made in antici-pation of its standardisation, that springs FW.1472 should be held up for the 100 sets of Wraith parts, and that six sets of the new springs should be ordered in case they are necessary for the six production cars. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||