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).
Fitting larger governor weights to the Wraith shock damper unit due to a different gear ratio.
| Identifier | ExFiles\Box 9\8\ 08-page20 | |
| Date | 3rd July 1937 | |
| To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} c. to E.{Mr Elliott - Chief Engineer} 642 Rm{William Robotham - Chief Engineer}/Les.5/AP.3.7.37. WRAITH SHOCK DAMPER GOVERNOR UNIT As the servo to prop. shaft gear ratio is 10.5 to 1 on Wraith against 8 to 1 on the 25.HP, it will be necessary to fit larger governor weights to the shock damper control unit in order to maintain the desired pressure. Will you please put the Ph.III. governor weight F.84562 on the LOP. for Wraith shock damper governor unit. we have tried this on two cars. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | ||