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).
Comparing Smith 2D and Lucas E.575 dynamos and discussing improvements.
| Identifier | ExFiles\Box 36\4\ scan 093 | |
| Date | 23th July 1920 | |
| H.R. 99 (500T) (SDc76 19-7-17) MP18/8865 X.3014 b. EFC2/123.7.20. To R.{Sir Henry Royce} from EFC. c. to CJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to Da.{Bernard Day - Chassis Design} c. to Hs.{Lord Ernest Hives - Chair} c. to PN.{Mr Northey} c. to Wd.{Mr Wood/Mr Whitehead} X.295 - SMITH 2D AND LUCAS E.575 DYNAMOS. X.3014.b X.3762 X.3923 With reference to your note R2/G17.7.20, par:11. In addition to the two Smith type 2D dynamos fitted to 49-GB and 6 EX respectively, we have now just received three further machines of this type, one of which we will have sent to you immediately for your examination. X.4164 Mr. Hives is decidedly pleased with the operation of these dynamos on the road and on this account we received a visit yesterday from Mr.Lock of Messrs. Smith with a view to discussing the question of switchboards suitable for use with the Smith dynamo and cut-out. The report on this visit we are making the subject of another note. So far as we can see we do not entertain great hopes of Messrs. Lucas materially improving their dynamos, either from the point of view of cutting in point or output, or from the point of view of silence, so long as they retain the particular method of 3rd brush control, which seems to have a great deal to do with the inefficiency of the machines in both these respects. The principle used on the Smith dynamos effects in the ideal case at any rate, a better mechanical and electrical balance of the Contd. | ||