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).
Higher output dynamo for a customer named Malcolm Campbell, comparing a new 48 coil machine to an older one.
| Identifier | ExFiles\Box 60\1\ Scan289 | |
| Date | 20th November 1930 | |
| X6006. By.{R.W. Bailey - Chief Engineer} from EFC. EFC4/AD20.11.30. MALCOLM CAMPBELL. - HIGHER OUTPUT DYNAMO. The average 48 coil high output machine recently standardised for use with the half charge switching system has a considerably higher output than the old 56 coil machine modified by trailing the poles. The increase in peak output is about 3 1/2 amperes and the cutting in point in road speed is only increased from 13 to 16 miles per hour, there is, therefore, a small loss in the early stages but there is a very big gain of output in the neighbourhood of the peak and at higher speeds, in fact a big enough gain to make it, in our opinion, certainly worth while providing this customer with one of these up-to-date machines. EFC. | ||