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).
Inefficiency of the Wraith servo and proposing the use of the Bentley and 25/30 servo as an alternative.
| Identifier | ExFiles\Box 131\4\ scan0160 | |
| Date | 16th April 1937 | |
| J113. Hs.{Lord Ernest Hives - Chair} from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} RHC.{R. H. Coverley - Production Engineer} E.{Mr Elliott - Chief Engineer} By.{R.W. Bailey - Chief Engineer} Da.{Bernard Day - Chassis Design} MX.{John H Maddocks - Chief Proving Officer} Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux}/R.16.4.37. WRAITH SERVO. The Wraith servo has been found to be inefficient due to general weakness of the design. Considerable time will have to be spent in re-designing to obtain a satisfactory servo. In the Bentley and 25/30 we have got the latest servo with a maximum efficiency which has taken considerable time. to obtain. Why cannot this servo be used on the Wraith. The references for this servo are to be found in;- By/TWD{T. W. D???Aeith}5/E11.2.37. By/TWD{T. W. D???Aeith}5/E 7.1.37. By/TWD{T. W. D???Aeith}2/E30.12.36. By/TWD{T. W. D???Aeith}5/E26.1.37. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||