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 table of temperature tests conducted at Brooklands on the 10-EX car under various conditions.
| Identifier | ExFiles\Box 29\3\ Scan172 | |
| Date | 13th September 1927 guessed | |
| 10-EX BROOKLANDS TEMPERATURE TESTS. CUTOUT OPEN. | CUTOUT CLOSED. Condition of car. | Oil temp. | Water temp. | Seats. Front. | Seats. Rear. | Oil temp. | Water temp. | Seats. Front. | Seats. Rear. Louvred bonnet. | 80°C | 70°C | 32°C | 29°C | 88°C | 74°C | 33°C | 31°C Shuttered bonnet. | 87°C | 75°C | | | 90°C | 79°C | 35°C | " Plain bonnet. | | | | | 100°C | 95°C | 40°C | Tail removed. | 80°C | 73°C | 32°C | 28°C | 88°C | 74°C | 33°C | 30°C Undershield removed. | 70°C | 72.5°C | 30°C | 27°C | 75°C | 72.5°C | 32°C | 29°C 46-PK bonnet shutters closed. | | | | | 100°C boiling. | | | Ditto - shutters open. | | | | | 88°C to 90°C | | | All temperatures under running conditions and reduced to the mean ats. temperature in the shade for the tests of 20°C. Condition of car for test: Complete undershield and tail, 17-tooth axle, 5 to 1 comp: ratio, turbulent head, aluminium engine. No.1 modified camshaft, heat shield for silencer. The temp. of the front seats was taken in the centre of the car immediately under the instrument board, that of the rear seats just above the floor boards in line with the front of the rear seats in the centre of the car. ------------------------ Hs{Lord Ernest Hives - Chair}/W. A.{Mr Adams} Robotham. | ||