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).
Cooling system tests for car 32-EX at Brooklands, focusing on radiator heat dissipation and the oil temperature regulator.
| Identifier | ExFiles\Box 131\1\ scan0350 | |
| Date | 19th October 1937 | |
| By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Std. c. Hs.{Lord Ernest Hives - Chair} c. Da.{Bernard Day - Chassis Design} c. Mx.{John H Maddocks - Chief Proving Officer} Handwritten: 1114 also 1320 Spare Rm{William Robotham - Chief Engineer}/Std.3/AP.19.10.37. REPORT ON TESTS ON COOLING SYSTEM ON 32-EX. CAR AT BROOKLANDS. The above car was taken to Brooklands in order to determine:- (a) whether the heat dissipation of the radiator matrix had appreciably decreased during its 15,000 miles running in France. (b) what effect on the maximum oil temperature was made by removing the oil temperature regulator. The tests carried out were as follows:- The car was driven at maximum speed and throttle opening in both standard top gear and overdrive gear until the water temperature (measured at outlet from A.{Mr Adams} block) was steady. Atmospheric temperatures, cyl. head temperatures (normal thermometer position) and oil inlet to bearings temperatures, were also recorded. It was intended to repeat these tests with and without the oil temperature regulator, but the car was handed over without the unit fitted and before the first tests were completed, a big end bearing failed and tests had to be discontinued. Results from Tests. The results obtained before the failure of the bearings are shown on attached sheet (1) compared with (a) figures obtained before 32-EX. car went to France, (b) figures obtained during running in France. It must be mentioned that on the std. top gear test at the end of the running, the water and oil temperatures rose quickly together until the failure of the bearing and therefore this figure is unreliable. Sheet (2) attached shows comparative tests made on 32-EX. car matrix after 15,000 miles in France, on a new Mk.Vl.{V. Lewis / Mr Valentine} matrix of identical construction and on a new standard Mk.Vl.{V. Lewis / Mr Valentine} matrix; these tests were made on Messrs John Marstons' test plant at Wolverhampton. continued.. | ||