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).
Summary of Phantom II radiator tests conducted in France, detailing temperature rises during a hill climb.
| Identifier | ExFiles\Box 16\2\ Scan026 | |
| Date | 7th August 1931 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. Da.{Bernard Day - Chassis Design} E.{Mr Elliott - Chief Engineer} c. Ev.{Ivan Evernden - coachwork} PN.{Mr Northey} 87250 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/AD7.8.31. P.II RADIATORS. Attached is a summary of the tests on radiators carried out in France by C.W.H. It will be observed that some tests were carried out on the level and some hill climbing. Both way readings were taken on the level to discount wind, the hill climb was carried out in still air. The hill is about 4.25 miles long and rises 2150 ft. with a steady top gear gradient. The temperature rise during a typical climb was as follows. During such climbs the car boiled if for any reason it was balked. The effect of a following wind is demonstrated by the fact that the car reached over 100°C. with bonnet shutters open when the air temperature was only 31.8°C. i.e the following wind lowered the critical atmospheric temperature by about 7°C. on the level. Top Gear. Miles. Air. Water. 0 45 25 80 .5 45.5 25 82 1 46 24 85 1.4 46.4 24 87 1.9 46.9 24 90 2.2 47.2 23 92 2.6 47.6 22 92 3.1 48.1 21.5 93 3.5 48.5 21 94 3.9 48.9 21 94 4.3 49.3 20 95 10 minutes. Max. 37 M.P.H. Min. 13 M.P.H. We should expect a somewhat similar result on a hill climb. There is no doubt that the anti-spill cap reduces water loss, and we hope to obtain a relative figure for this when the car goes to the hills for the completion of its test. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Attachments. | ||