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).
40/50 Dynamo Output and the rationale for including a specific performance curve.
| Identifier | ExFiles\Box 61b\1\ scan0220 | |
| Date | 5th June 1931 | |
| X6126 FN. from Hs{Lord Ernest Hives - Chair}/Pgt. c. SG.{Arthur F. Sidgreaves - MD} c. WOr.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} c. Da.{Bernard Day - Chassis Design} EV.{Ivan Evernden - coachwork} Hs{Lord Ernest Hives - Chair}/Pgt1/AD5.6.31. 40/50 DYNAMO OUTPUT. X6126 X6016. In reply to your FML/WT3.6.31 we agree that with the two rate charge scheme the dynamo must be running under one of the two conditions (a) and (b) stated by you, and that from that point of view Curve 1, is superfluous. We included Curve 1. on that particular sheet of curves, however, merely because we considered it was useful in so far as it showed :- (1) What the dynamo is capable of doing when running direct on the battery and, therefore, the reason for having some form of reduced charge switching. (2) To what extent the lamp load held the voltage down and so prevented the dynamo from giving its full output. (3) The amount by which we proposed to deliberately reduce the output, for daytime running, by the insertion of a resistance in the field circuit. Hs{Lord Ernest Hives - Chair}/C.A.Pignatt. | ||