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 of temperature readings from a vehicle test with ventilators and windows closed.
| Identifier | ExFiles\Box 75\4\ scan0115 | |
| Date | 1st July 1912 guessed | |
| 11 1. Dashboard filled in, louvred side guards, Ventilators closed, all windows closed. Temp. Floorbs. Body. Temp. Water temp. Time under full power. Air temp. 41 29 70 8½ mins 18 49 28 boil 18 No draught, no smell. Strong (crossed out) trailing wind bort | ||