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).
Specification sheet for Wraith steering gear preloads.
| Identifier | ExFiles\Box 9\7\ 07-page120 | |
| Date | 19th January 1938 | |
| 650. RHC.{R. H. Coverley - Production Engineer} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. By.{R.W. Bailey - Chief Engineer} Rm{William Robotham - Chief Engineer}/F&M4/R.19.1.38. WRAITH STEERING GEAR PRELOADS. We give below the preloads with which the Wraith steering gear should be assembled:- (1) Roller Follower. 4 - 8 ozs at 3" rad. (2) Rockershaft alone. ½ - 1½ lbs at end of pendulum lever. (3) Cam alone. ½ - 1½ lbs at rim of steering wheel. (4) Complete gear. 1 - 1½ lbs at rim of steering wheel in central position. The above preloads have been applied to Experimental Wraith chassis with the reduced caster angle of ½ degree, including the 10,000 mile test car. Rm{William Robotham - Chief Engineer}/F.J. Hardy. | ||