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).
Comparison of Bosch, Lucas, and Bijur dynamo systems, discussing their performance and voltage ratings for use in the cars.
| Identifier | ExFiles\Box 36\4\ scan 174 | |
| Date | 25th November 1920 | |
| Contd. -2- By 2/P25.11.20. In this connection I would like to point out that the Bosch dynamo received from America is poor and would not give as consistent results as the Lucas. This remark is based upon a report just issued by our Technical department. We do not wish American, however, to think that the dynamo is not receiving attention, as every effort is being made to obtain a dynamo which will give better all round results than the Lucas and cover fully the exacting conditions of service on the Rolls-Royce car, and we feel that we have a resonable hope in the future of introducing something that will be really good in the way of a dynamo, but in the meantime we must ask America to do the best they can with the present Lucas system. I might add, that taking even the Bijur system, which the writer has personally been strongly in favour of from 1913 onwards and pushed it for all he was worth, Mr. Bijur himself, who paid us three or four visits to our works, definitely stated that the value of the Bijur system, as such, consisted in using same in conjunction with a 6 volt system, and that if a 12 volt Bijur was resorted to he could not feel sure that we should get anything like as good results, in fact, he rather deprecated the use of the voltage vibrating control, on anything above a 6 volt, from which it will be obvious that if such an authority as Mr. Bijur himself makes such a statement that it is obvious that it cannot be adopted by this Company without thorough testing. Contd. | ||