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).
Temperature tests comparing conditions with and without high side-doors.
| Identifier | ExFiles\Box 75\4\ scan0004 | |
| Date | 17th November 1909 | |
| R.R. 148 (20 H) (H.{Arthur M. Hanbury - Head Complaints} 448. 20.10.09) E.P. 5185. TEMPERATURE X819 35-00 Temperature tests with high side-doors - taken by WH 17/11/09 No side-doors Atmos. temperature | Radiator | Floorboards + 1 | 72 | 56 degs C + 1/2 o C. | 71 1/2 | 57 + 1 | 75 | 61 o | 72 | 64 Average Rad. 72.6 F-B 59.5 With side-doors - 1/2 | 65 | 60 - 1/2 | 65 | 64 o | 64 | 59 Average Rad. 64.6 F-B 61 (SEE BACK) rd | ||