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).
Testing of Autoclean and Zenith filters and a request for a laboratory test.
| Identifier | ExFiles\Box 44\1\ Scan105 | |
| Date | 14th February 1927 | |
| To Hl. from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X4037 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG14.2.27. +3700 We have sent you 2 filters which we have been testing - the Autoclean and Zenith (the Zenith having the glass cover). As far as we can ascertain the distance between the plates of the Zenith filter is about .0015". The particles however which we have measured and which have passed through this filter appear to have dimensions as big as .0015 cu. We should be interested if you could devise a laboratory test which would indicate whether particles of this size could actually pass the filter. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||