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).
Implementation of voltage regulator dynamos on the Peregrine chassis.
| Identifier | ExFiles\Box 163\6\ img210 | |
| Date | 22th September 1932 | |
| By.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Wst. c. EY/RD. c. E.{Mr Elliott - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} X6016 Hs{Lord Ernest Hives - Chair}/Wst.3/KT22.9.32. X.6096 X.6016 X.6142 VOLTAGE REGULATORS ON PEREGRINE We wish to start off the exptl. Peregrine chassis with voltage regulator dynamos, in preference to the three-rate charge third brush control dynamo. In order to save time, however, we are proceeding on the first two Peregrines with the proposed standard three rate charge, 20/25 scheme incorporating D.sch.529 dynamo, modified switchbox and resistance unit as instructed. We should be glad, therefore, if you will arrange to look into the question of instructing the remaining four Peregrine chassis with 20/25 shunt dynamos and C. A.{Mr Adams} V.{VIENNA} regulator units. The shunt dynamo for these machines, in order to save time, can be the proposed standard D.Sch.529 dynamo, modified by deleting the control brush, fitting concentric poles and altering the field winding. The field winding we have found most suitable, at the moment, on our existing 20/25 shunt machine, which we have been running, consists of approx. 200 turns per pole of 21 S.W.G. D.C.C. wire and we suggest that this winding be instructed for these four machines A regulator unit will be required consisting of the C.A.V. regulator mounted suitably on a base plate, with a small resistance unit mounted alongside, all under one cover, as on 19-EX. We proposed handing to EY/RD. a C.A.V. regulator, so that a suitable drawing can be made, and we will also arrange to let him have the value of the resistance required. A new wiring diagram will also be required showing the inclusion of the regulator in the scheme. With regard to the brush setting of the dynamo, we cannot give precise details of this until we have had at least one machine for test. We recommend that temporarily these machines be instructed with the existing third brush control setting. The issuing of these new instructions will naturally cancel the existing instructions to the shop for the Peregrine chassis dynamo, switchbox, distribution board etc. | ||