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 and developing a new Lucas C.575 dynamo compared to the standard E.575 model.
| Identifier | WestWitteringFiles\D\May1920\ Scan75 | |
| Date | 29th May 1920 | |
| R.R. 235A (100 T) (S.G. 648, 19-2-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2618 To R.{Sir Henry Royce} from EFC. c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Bn.{W.O. Bentley / Mr Barrington} c. to Da.{Bernard Day - Chassis Design} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Hs.{Lord Ernest Hives - Chair} c. to Wd.{Mr Wood/Mr Whitehead} c. to PN.{Mr Northey} c. to By.{R.W. Bailey - Chief Engineer} ORIGINAL. EFC1/T29.5.20. 3 X.4060 - LUCAS C.575 DYNAMO. X.3014b X.294 In our Ck{Mr Clark}2/T8.1.20, we mentioned the fact of Messrs. Lucas having experimentally produced a dynamo known as their C.575 type, this dynamo being a 4-pole machine with concentric armature, designed to cut in at an earlier speed, but giving a smaller out-put than our present standard E.575. We have recently received one of these machines and have already put this through certain tests on the bench. We have correspondence to show that, ever since our adoption of the E.575 dynamo as being the most suitable machine available at the time, but not entirely satisfactory in the matter of cutting in speed, we have several times urged Messrs. Lucas to develop for us a machine giving a hot cutting in speed of about 525 R.P.M. and an out-put in the hot condition of round about 10 amperes at normal running speeds. It now appears that, using the Lucas system of control, and without increasing the weight of the machine, it may have been impossible to do this, but we had suggested to Messrs. Lucas that such a performance could be obtained by increasing the weight to, say, 34 lbs, in place of 30 lbs., Contd. | ||