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).
Air Ministry general specification document for Ethylene Glycol.
| Identifier | ExFiles\Box 151\3\ scan0094 | |
| Date | 1st July 1929 | |
| X1435 COPY AIR MINISTRY GENERAL SPECIFICATION NUMBER D.T.D.116 FOR ETHYLENE GLYCOL July, 1929. (1) Description. - The material shall be a clear, colourless liquid, free from visible impurities. It shall be miscible with water in all proportions. (2) Specific Gravity. - The specific gravity at 60°F. {Mr Friese} (15-6°C.) shall be not less than 1-115 or more than 1-118 when compared with water at the same temperature. (3) Distillation Range. - The distillation range of the material as determined by distilling 100 c.c. in the Standard Distillation Apparatus (B.S. Specification 3 D.15) at the rate of two drops per second, shall be such that the first drop distils over at a temperature not below 185°C.(365°F. {Mr Friese} ) and not less than 95 c.c. shall distil over between 190°C.(374°F) and 200°C.(392°F. {Mr Friese} ), without frothing or showing signs of decomposition. (4) Neutrality. - The material shall be neutral to phenolphthalein and methyl red when 10 c.c. are shaken with 10 c.c. of recently boiled and cooled distilled water. (5) Freedom from Impurities. - The material shall be free from chlorides and sulphates. (6) Freezing Point. - The freezing point of a mixture of equal volumes of the material and water shall be not higher than - 30°C. ( - 22°F. {Mr Friese} ). No deposition of solid shall occur when the mixture is maintained at this temperature for 1 hour, with frequent shaking. F. {Mr Friese} V. {VIENNA} HOLT, Air Commodore, Director of Technical Development. Sp. {Mr Spinney} Ht. .60 | ||