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 performance, radiator variations, and oil temperature during vehicle testing.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan097 | |
| Date | 25th May 1930 | |
| -3- Hs{Lord Ernest Hives - Chair}/S.1/AL.25.5.30.Contd. at least 10°C. lower when running full throttle than when touring at 60 M.P.H. as in these tests, which means that even with the cooling system in 100% condition, anything above an atmospheric temperature of 25°C. will cause trouble. This is indicated in Graph (4), though little all out work was carried out because the tyres would not stand up to it, the track being in poor condition. It appears to us that if we do not increase the facilities for the air to get away from under the bonnet, we cannot take advantage of the increased frontal area of the Phantom 11 radiator, and so counter balance the decrease of tube length from 4.5" to 4.00" which took place when we went from Phantom I to Phantom 11. 12-EX. CAR. We compared this car with 19-EX. The results are given in Graph (5). We attribute some of the increased temperature to the special pistons fitted to this car becoming tight. Variations in Radiators. We tested two radiators made of the same parts. The results show that we can get appreciable variations in the cooling of radiators made to the same drawing, and we are investigating the reason for this discrepancy. Oil Temperature. The temperature which the oil inlet to the engine reaches is rather excessive (Graph (4). We have recorded temperatures as high as 110°C. after a prolonged burst of speed on the track with atmospheric temperatures of only | ||