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).
Laboratory note regarding scum formation in a carburetter casing caused by electrolytic action.
| Identifier | ExFiles\Box 74\4\ scan0018 | |
| Date | 4th January 1919 | |
| X.3064 EFC. January 4th, 1919. X.3484 Laboratory. H12/B4119. In answer to your note EFC1/AT3119. All reference to the scum formed, due to the electrolytic action of water, in a carburetter casing is given in the last paragraph of our note H15/B191218., and is given below:- " The scum itself was found to contain Sodium and Silicon, and it is probable that sodium silicate was used during manufacture and this may have accentuated the trouble". [Handwritten] The alloy was 12% Copper similar to our old piston metal HCH | ||