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).
Log sheet recording results from temperature tests on a vehicle under various driving conditions.
| Identifier | ExFiles\Box 75\4\ scan0010 | |
| Date | 3rd August 1911 | |
| R.R. ITS (20 H) (W 414. 13.4.11) G 1615. Floor boards 2000 . 3/8/11,X819 E.H. Temperature Tests 3500. Taken on 1419 with side doors + Summer windscreen Atmospheric Temp 26°C. Dashboard with ventilators & also holes XX for air to enter under floor boards Table: 1 Floor boards Radiation Miles run | M.P.H | Start | finish | Start | finish | Holes in dash | Ventilators in dash | Notes 5 | 20 | 26° | 39° | . | 78° | closed | closed | Starting from W 5 | 30 | 38° | 40° | 78° | 77° | closed | closed | light running 5 | 35 | 38° | 36° | 77 | 72 | " | " | " 3 | 20 | 36° | 37 1/2° | 66° | 74° | " | " | Ashbourne Hill 3 | 20 | 36° | 36° | 67° | 77 | open | closed | " 3 | 30 2nd gear | 35° | 38° | 67° | 75° | closed | " | " 2nd gear 3 | 30 2nd gear | 35° | 35° | 68° | 77° | open | " | " 2-nd gear 3 | 25 | 35° | 37° | 67° | 81° | open | open | " (over) R | ||