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).
Test results for 'Mex' Spirit on bench engine X976.
| Identifier | ExFiles\Box 20\4\ Scan001 | |
| Date | 21th July 1909 guessed | |
| R.R. 148. (20 H) (F.{Mr Friese} 23. 22.4.09) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 6930. Tests on "Mex" Spirit Taken 16/21-7-09 3200 by Worler on Bench Engine X976 Speed | V Reading | A Reading | HP | Carburettor set to full off at | Time of 1" consump. | HP per gall ---|---|---|---|---|---|--- Dead slow 150 | 32 | - | - | -3 +3 | | 300 | 48 | - | - | -3 +3 | | 500 | 65 | - | - | -2 +4 | | 500 | 65 | 15/60 | 5.7 | -4 +3 | | * 500 | 65 | 30/120 | 11.5 | -4 +4 | 2' 28" | 7.1 500 | 65 | 45/180 | 17.2 | -3 +4 | | * 500 | 65 | 60/240 | 23 | -1-2 +4 | 1' 32" | 8.81 750 | 88 | 57/228 | 29.5 | -1-2 +3 | | 1000 | 120 | 54/216 | 38.2 | -1 +3 | 1' 2" | 9.86 1250 | 39/156 | 50/200 | 45.9 | -1 +4 | | * 1500 | 45/180 | 46/184 | 48.8 | -1 +5 | 48" | 9.78 1750 | 54/216 | 36/144 | 45.8 (Standard) | -1 +5 (Reddish brown and 70%) | | | ||