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 temperature readings with specific dashboard, guard, and window settings, noting a bad draught.
| Identifier | ExFiles\Box 75\4\ scan0109 | |
| Date | 1st July 1912 guessed | |
| 5/ 4. Dashboard not filled in, engine side guards louvred, dashboard ventilators closed, both front windows open, only. Temp Floorbs. Body Temp. Water temp. Time under full power. Air temp. 49 18 70 10 15 60 15 91 mins. 15 No smell, bad draught. | ||