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).
Testing reduced charge switching arrangements and changing the specification for the resistance units.
| Identifier | ExFiles\Box 163\6\ img055 | |
| Date | 7th October 1930 | |
| X6016. By.{R.W. Bailey - Chief Engineer} from EFC. EFC2/ADL 7.10.30. X.6016. RE - SIX SETS OF REDUCED CHARGE SWITCHING ARRANGEMENT COMPRISING :- 6 - HIGH OUTPUT 48 COIL DYNAMOS. 6 - HALF CHARGE DISTRIBUTION BOXES. 6 - HALF CHARGE SWITCHBOXES. 6 - HALF CHARGE RESISTANCE UNITS. We have now received the above apparatus for production test and are going ahead with these tests. In conversation with you this morning it was arranged that three of the resistance units should be of the next higher value in resistance, therefore, will you please arrange to instruct three such resistance units the specification of which will be :- 2'9" (i.e. 33") of 26 S.W.G. Eureka wire in place of the standar dquantity 2'1" (25") of 26 S.W.G. Eureka wire. We have no 33" resistance so would be pleased if Mr.Brock could be asked to produce one of these quickly which would enable us to make an early comparison and produce a set of curves accordingly. EFC. | ||