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).
Fault with a 40/50 petrol filter, attributing the cause to the use of zinc chloride or acid soldering flux.
| Identifier | ExFiles\Box 135\2\ scan0051 | |
| Date | 1st January 1924 | |
| EP.{G. Eric Platford - Chief Quality Engineer} c. Hs.{Lord Ernest Hives - Chair} X3201 BY2-P31.1.24. 40/50 PETROL FILTER. Referring to EP{G. Eric Platford - Chief Quality Engineer}6/H29124, we have only had one instance of this trouble prior to the case you cite. At the time we made careful examination of the whole question, and finally decided that the use of zinc chlorides or acids as a soldering flux was the cause of the trouble. We altered the flux which was being used from zinc chloride to chemico, which, by Hl's test shewed distinctly better. Since then we have had no complaints at all, with the exception of the one you now bring forward which was soldered prior to the trouble in question occurring. In addition, we are actually supplying a spare filter so that the customer can easily keep going. I do not feel there is any need for us to get in a panic on this issue. BY.{R.W. Bailey - Chief Engineer} | ||