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).
Outcome of lamp demonstrations, focusing on driving light power, anti-dazzle schemes, and fog lamps.
| Identifier | ExFiles\Box 61a\2\ scan0449 | |
| Date | 9th December 1934 | |
| 86116. S/W. Wst. re- Lamp Demonstrations. Cxll/KWS9.12.34. I think we agreed the outcome of our experiments is that we do not require quite such powerful driving lights as those we tried on the streamline Bentley last night. Would it not be sufficient if you merely substituted the 48 watt for the 60 watt filament, which gave such immense beams? This might reduce this beam sufficiently, and at the same time reduce the current consumption and thus give us two benefits with one move. If then you could improve the illumination when the anti-dazzle filament is being used, so as to give a little more safe driving light with no more anti-dazzle than at present then we might achieve a very satisfactory result. By dazzle with the anti-dazzle scheme I mean that whilst there is no glare from the lamps there did appear to be a good deal of dazzle when one was about to pass an oncoming car. We ought to watch that we do not increase when increasing the driving light from the anti-dazzle scheme. Will you please say if you hope to effect any improvements along these lines, and how soon you reckon we could have a pair of lamps so modified to gain some experience with in London ? I think it is quite clear that we must regard the fog lamp and headlamps as two separate issues, the one not being suitable for the other, and that we must deal with fog by a separate lamp and separate methods. We are asking the Benjamin lamp people to let us know if they could produce lamps of the Currus type for us, as I understand from you that Lucas are not interested in doing this. Cx.{Major Len W. Cox - Advertising Manager} -Lul | ||