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).
Analysis of lead and bromide deposits, discussing potential causes related to ethyl gasoline and blended lubricating oils.
| Identifier | ExFiles\Box 150\1\ scan0029 | |
| Date | 24th July 1935 guessed | |
| -3- The amount of bromide present is much less than sufficient to account for the lead found. A large proportion of the latter must be present in the metallic state, or as oxide. The analyses do not reveal any obvious reason why the corrosion should be ascribed to the ethyl gasoline. The presence of lead, is, of course, normal in sludges from crank cases, etc. of engines using ethyl gasoline fuel. The question of the lubricating oil might, however, be followed up. It would appear from the analysis that a blended oil has been used. The point arises whether the fatty oils (or added metallic soaps) might be chemically attacked by aluminium under the conditions existing in the engine concerned. | ||