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 report on a petrol sample's distillation, specific gravity, and suitability for aero engines.
| Identifier | ExFiles\Box 76\3\ scan0089 | |
| Date | 18th March 1919 | |
| R.R. 235A (500 T) (S.D. 408. 26.4.17.) Bm. 2/156/13. E.H. c to E.P. e to Works. H13/EB18319. Laboratory. [Handwritten]: Mexican spirit Re sample of Petrol (quality and name not specified) submitted in a tin mug yesterday from Experimental. The petrol was found to start boiling at 45 C. Only 26% was distilled over at 100 C. " 31% " " " " 120 C. " 33.5%" " " " " 125 C. The specific Gravity = .733. Rectification Test. This gave too dark a colour and the petrol became cloudy (see our suggested specification). From the above results it appears that the spirit is a heavy one, seeing that 66.5% does not come over till 125 C is past. The Specific Gravity is on the high side but passable. The Rectification Test shows that the petrol is not suitable for Aero Engines. [Handwritten note]: Mr Hives what sort of petrol this was please [STAMP 1]: TEST DEPT. 18 MAR. 19 RECEIVED [STAMP 2]: TEST DEPT 19 MAR. 19 RECEIVED | ||