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).
Bench engine test results for 'Rupidin' spirit fuel.
| Identifier | ExFiles\Box 20\4\ Scan002 | |
| Date | 21th July 1909 | |
| R.R. 148. (20 H) (F.{Mr Friese} 23. 22.4.09) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 6930. X976/16-21/7/09 3200. Tests on "Rupidin" Spirit Taken by Worler on Bench Engine Speed | V Reading | A Reading | HP | Carburettor set | fall off at. | Time of 1" Consumption | HP hr per gall Dead Slow 150 | 32 | - | - | -3 | +3 | | 300 | 48 | - | - | -4 | +3 | | 500 | 65 | - | - | -1 | +3 | | 500 | 65 | 15 | 5.7 | -4 | +4 | | x 500 | 65 | 30 | 11.5 | -4 | +4 | 2'22" | 6.82 500 | 65 | 45 | 17.2 | -4 | +5 | | x 500 | 65 | 55 220 | 21.0 | -1 | +4 | 1'27" | 7.6 750 | 88 | 52 208 | 26.9 | -1 | +4 | | x 1000 | 120 | 50 | 35.4 | -1 | +4 | 50" | 7.88 1250 | 39 156 | 46 | 42.2 | -1 | +4 | | x 1500 | 45 180 | 39 156 | 41.3 | -1 | +4 | 40" | 6.88 1750 | 54 21.6 | 31 124 | 39.4 | -1 | +4 | | (OVER) | ||