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).
Investigation into improving the output curves of Lucas C.575 and Smith Type 2D dynamos.
| Identifier | WestWitteringFiles\E\June1920\ Scan5 | |
| Date | 17th June 1920 | |
| R.R. 199 (250T) (SD676 19-7-17) MP 180865 ORIGINAL To R.{Sir Henry Royce} from EFC. c. CJ. c. E.{Mr Elliott - Chief Engineer} c. Bn.{W.O. Bentley / Mr Barrington} c. Da.{Bernard Day - Chassis Design} c. EP.{G. Eric Platford - Chief Quality Engineer} c. Hs.{Lord Ernest Hives - Chair} c. Wd.{Mr Wood/Mr Whitehead} c. PN{Mr Northey}+ c. By.{R.W. Bailey - Chief Engineer} EFC1/T17.6.20. ___ X.4060 - LUCAS C.575 DYNAMO. X.295 - SMITH TYPE 2D DYNAMO. ___ Further to our reports EFC1/T29.5.20, and EFC2/T3.6.20, we have now nearly completed our investigations of the possibilities of improving the output curves of Lucas and Smith dynamos, without producing overheating, by advancing the control brush system in each case. A report and curves in connection with these results will be sent to you later. In the case of the C.575 dynamo we find that we can only materially improve the output curve at the expense of greater heating of the machine, the amount of which heating corresponding to a reasonable output, we consider to be excessive. In view of the results obtained on the C.575 dynamo including the output results already reported to you in comparison with the E.575, it has now been arranged with Messrs. Lucas that they modify this type of dynamo to give us a somewhat different output curve in which the cutting in speed remains approximately the same and the output is increased in the early stages and allowed to fall away to some extent in the later stages by rather over-controlling the machine. This they say they can do, and they consider Contd; | ||