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).
Dynamometer test results for a 15.9 HP Humber Car engine.
| Identifier | ExFiles\Box 126\2\ scan0015 | |
| Date | 5th April 1921 | |
| X.1525 5.4.21. HUMBER CAR. 15.9 HP. Dynamometer Test. Revs. | Lbs. | HP. 500 | 85 | 8.9 750 | 82.5 | 13 1000 | 82 | 17.3 | 80 1250 | 77 | 20.5 | 45 1500 | 70 | 22.1 | 69 1750 | 64 | 23.7 | 61 2000 | 62 | 26.2 | 59 Time for 5 galls. water 75°C 6 mins. 48 secs. R.R. 235B (100 T) (S.H. 798. 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2648 | ||