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).
Specification sheet for '100 Octane' fuel, comparing its properties against the D.T.D.230 standard.
| Identifier | ExFiles\Box 150\1\ scan0044 | |
| Date | 22th August 1935 | |
| Page 2. Hs{Lord Ernest Hives - Chair}/Wd.{Mr Wood/Mr Whitehead}2/GB.22.8.35. "100 OCTANE" FUEL. D.T.D.230. Specific Gravity @ 60°F.{Mr Friese} ................. .7220 | Not greater than .79 at 15°C. Initial Boiling Point ................... 50°C. Distillation @ 60°C. ...................... 1% 65°C. ...................... 1½% | Below 75°C.not less than 10% 70°C. ...................... 3% 95°C. ...................... 38% | At 100°C. not less than 50% 100°C. ..................... 55% 125°C. ..................... 96% | At 150°C. not less than 90% End Point ............................... 138°C. | Not greater than 180°C. Recovery ................................ 98½% | Not less than 96%. Residue ................................. 1% Distillati on Loss ...................... ½% | Not greater than 2%. Octane Number (C.F.R.M.) ................ 97½ Octane Number (Air Ministry Mthd.) ...... 98. | 87 Freezing Point .......................... Below -60°C. | Not higher than -60°C. Lead Content ............................ 4 c.c. T.E.L/Imp.Gall. --------------------- | ||