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).
Engine temperature tests comparing performance with and without a fan.
| Identifier | ExFiles\Box 75\4\ scan0002 | |
| Date | 26th January 1909 | |
| R.R. 148 (6H) (A.{Mr Adams} 742. 30.11.08) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 6451. Temperature Tests 3500 X819 Time taken to boil water with out fan engine standing = 20 mins Engine running at 500 revs per minute car standing still without fan surrounding temperature atmospheric = 6°C water rose to boiling point in 20 minutes Then fixing fan under same conditions of running the water from boiling point to 73°C Road tests agree when the engine is pulling at slow speeds. at full power. Fan not effective when car is going at a good speed. Mill 26/1/09 | ||