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 Lucas, Bosch, and Bijur motor and generator systems for suitability in cars.
| Identifier | ExFiles\Box 23\2\ Scan050 | |
| Date | 27th April 1920 | |
| Contd. -5- obtained on the production of generators, are rather better than the Lucas. We think the work is cheap on this machine and do not believe we should consider it in comparison with the constant voltage Bijur machine with its attendant advantages. We are, to-day, putting together the Bosch Motor and Generator and will ship them to you. After inspection of these, and of the charts enclosed, we do not believe you will wish to make experiments because of the rathercheap detail work on the machines. We think, however, you will like to inspect the machines, particularly as the Bosch Motor is practically the same as has been used during the war for flywheel starters on second-hand Rolls-Royce cars. These, we believe, have been generally satisfactory. We do not know what ratio of gearing was used but are inquiring from the service station. SUMMARY. We think that the Bijur Motor and Generator are the right ones for us to use, if the Derby tests show them satisfactory, because:- a..The generator is the constant voltage system which is exceedingly desirable for fast cars used extensively for touring, because it avoids over-charging the battery; and which is particularly suitable for the Rolls-Royce because our generator is not driven very much faster than the engine and, therefore, on our cars it is particularly desirable, under city conditions, to have a high generator output to take care of a run-down battery. Contd. | ||