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 power absorbed by a fan on a dynamometer.
| Identifier | ExFiles\Box 75\3\ scan0001 | |
| Date | 27th May 1909 | |
| R.R. 148 (20 H) (C. 898. 26.2.09) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 6740. X1017 4000 Power absorbed by fan taken on dynamometer & Lowe 27/5/09 980 chassis. with & without fan. .7 HP at 1000 1 HP at 1500 1003 same CP 27/5 | ||