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).
Observations from road tests on different car series.
| Identifier | ExFiles\Box 147\5\ scan0025 | |
| Date | 18th December 1908 | |
| R.R. 148 (6 H) (C. 776. 18.12.08) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 6526. X459 These tests were taken with 5 up and heavy Roads on "D" of the second series, and with 5. up and good average Roads on C of the second series on the last test of the second series, the car was driven fast with the extra oiling arrangment disconnected, the engine commenced to knock slightly The gauge refered, to was a piece of fine net. which was fixed in front of the radiator | ||