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).
Report comparing the performance and issues of various petrol filters, including chamois leather, Zenith, and Auto-Klean.
| Identifier | WestWitteringFiles\Q\February1927-March1927\ 57 | |
| Date | 2nd February 1927 guessed | |
| contd :- -4- between the plates is not consistent, some of the orifices being .010". Nevertheless, it stops fluff reasonably well and the auto-cleaning device does function. We have taken the matter up with the makers to try and get them to improve the plate arrangement and possibly increase the capacity, a suggestion by CWB. being that the Auto Klean might be attached to the petrol tap, so automatically giving the filter a periodical cleaning. (h) Chamois leather filters. Chamois leather filters are attacked chemically by benzol and 50/50 mixture. For this reason they are liable to disintegrate after they have been in service some little time. As we do not wish to restrict the use of benzol on our cars, we think chamois leather filters are out of the question. SUMMARY. If prolonged road tests shew that the 'Zenith' filter will clear itself, it would seem to be a promising device in its present dimensions, otherwise an increase in capacity might overcome the trouble. It is of course far too heavy as manufactured, but this is unnecessary. The Auto-Klean has possibilities in the event of frequent cleaning being found essential with plate type filters. We do not like the idea of glass inspection covers which, if broken, will prevent the running of the car. We found that after cleaning the Zenith filter, a certain amount of the air was trapped in the system. We have incorporated a few small breathing holes indicated in the attached sketch, which have overcome this trouble. contd :- | ||