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).
Performance test results of a lengthened Lucas E.575 dynamo.
| Identifier | WestWitteringFiles\G\June1921\ Scan104 | |
| Date | 22th June 1921 | |
| To R.{Sir Henry Royce} & E.{Mr Elliott - Chief Engineer} from EFC. c. to CJ. & PN.{Mr Northey} c. to EP.{G. Eric Platford - Chief Quality Engineer} & Da.{Bernard Day - Chassis Design} c. to Bn.{W.O. Bentley / Mr Barrington} & Ry. c. to EWT. for R.R.Inc. ORIGINAL EFC2/T22.6.21. X.4352 - LENGTHENED LUCAS E.575 DYNAMO. Further to our EFC2/T11.6.21, we have now made some careful tests of the lengthened Lucas E.575 machine and we attach a photostat copy of curves showing the performance of this machine operating on our standard volt-ampere battery characteristics for both the cold and hot condition. In comparison with the curve of specified performance (hot) of dynamo for R.R. car and average performance (hot) of three standard Lucas E.575 machines. It will be seen that although the performance is a marked improvement in the matter of early cutting in speed and early output over the present standard, it still falls considerably short of our specified performance. It will be remembered from previous curves issued that the new Smith machine very nearly met with our specific-ation so that this new Lucas is not equal in performance to that other machine. Its weight is the same as the Smith, e.g. 34 lbs (if anything slightly greater). It may be noticed that the curve of performance of the lengthened E.575 machine now given is a little better than the one originally taken and sent to Mr. Royce plotted in pencil on a photostat. Since the early test we discovered that the output of the machine is rather susceptible to Contd. | ||