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).
Technical memo regarding specifications and rectifications for a Bijur Dynamo.
| Identifier | ExFiles\Box 38\3\ Scan024 | |
| Date | 19th August 1918 | |
| to R.{Sir Henry Royce} from EFC. c. to CL. X. 3362. EFC6/T19.8.18. X.3231.-RE BIJUR DYNAMO. Referring to the above dynamo, we will put on order some belting for driving this machine (8' of 3/8" Whittle) Re the direction of rotation being wrong, we suggest that the simplest way of rectifying this would be to change the connections to the brushes themselves in teh dynamo, including one field connection, because the regulator contains rather a mass of connections which we found a nasty business to alter. We did not consider that the resistance on the outside at the end of the aluminium box got too hot with the dynamo running at such a speed that the regulator was operating. The value of the resistance is about 4ohms, that is, about equal to that of the field magnet winding. The amperes circulating in this would be 12/8 - 1 1/2, so that the watts to be dissipated are about 6 (maximum). We agree that the surface of the resistance is rather small for this wattage. If you decide to use a resistance externally, you will find the connections for this little resistance quite easy to join up on removing the/coil . The dynamo should be capable of giving up to 10 amperes. By adjusting the regulator with the little key sent, it is possible to alter the current charging the (Contd). | ||