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).
Report from the London Midland & Scottish Railway Co. comparing the properties of two oil samples, 'A' and 'B'.
| Identifier | ExFiles\Box 144\1\ scan0123 | |
| Date | 22th February 1926 | |
| C O P Y. London Midland & Scottish Rly. Co., Chief Mechanical Engineers Dept., Chemist's Office, Calvert Street, Derby. 22nd. Feb. 1926. REPORT ON 2 SAMPLES OF OIL. MESSRS. ROLLS-ROYCE, DERBY. The two samples received were labelled "A" and "B". Results of examination :- A.{Mr Adams} B. Appearance in ¼" cell ... Dark orange, Dark orange, transparent, transparent, bright, greenish nearly bright, fluorescence. greenish fluor- escence, slightly paler than "A". Specific gravity at 60ºF.{Mr Friese} 0.9032 0.9096 Efflux Time } at 70ºF 1920 2407 (Redwood) } at 140ºF 226 241 seconds. } at 212ºF.{Mr Friese} 65 65 Flashing-point (close test) 398ºF.{Mr Friese} 408ºF.{Mr Friese} Cold Test (Setting-point). 20º - 23ºF 9º - 12ºF.{Mr Friese} Volatility (loss in weight) } in 1 hr. at 370ºF.{Mr Friese} in } 7.70% 9.34% a current of air). } Free fatty acid ............ 0.4% 0.1% Composition:- Mineral oil ............. 88.8 95.5 Fixed oil ............... 11.2 4.5 ______ ______ 100.0 100.0 The results of a detailed examination of the fatty acids (and alcohols) separated from the mixtures indicate that the fixed oil contained in sample 'A' is a mixture in equal parts by weight of sperm oil and a non-drying oil, mostly probably lard oil. The fixed oil in sample 'B' has the properties of cocoanut oleine. Comparative tests have also been made by intermittently heating the oils to a temperature of contd :- | ||