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).
The lubricating properties and performance of paraffin base hydrocarbons in petrol engines.
Identifier | ExFiles\Box 32\4\ Scan275 | |
Date | 5th October 1928 guessed | |
2. ---- The paraffin base hydrocarbons are good under less trying conditions, but it appears that they lack something for complete lubrication of a petrol engine - I should say this is due, as you state, to high cold set and also :- (1) Relatively poor resistance to cylinder heat, and the tendency to production of rather a hard carbonaceous film. (2) Poor lubricating value under boundary lubrication conditions. With respect to the medicatXed paraffin. The samples we have tried show a rather wide boiling point range of constituents. These appear to be largely paraffin hydrocarbons. Oxidation is, nevertheless, rather rapid, and the material is a very poor lubricant. H1 H | ||