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 test results for chassis 1152, comparing conditions with and without high side doors.
| Identifier | ExFiles\Box 75\4\ scan0007 | |
| Date | 7th November 1909 | |
| R.R. 148 (20 H) (H.{Arthur M. Hanbury - Head Complaints} 360. 16.9.09) E.P. 4941. Temperature tests 3500.X819 Taken by W. Hallam 7-11-09 on Chassis 1152 High side doors. Atmosphere 11°C. Maximum rise floorboards - 39 1/2 °C. " " water rise - 65 1/2 °C. 25 to 30 m.p.h. level road, without side doors. Same conditions of running, slight advantage in cooler floorboards of 2 to 3°C; but considerable difference as regards feel - warmer with side doors. ll RECORDED Q. 11/11/09. R | ||