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).
Test report on a 20 HP radiator comparing the cooling performance of a 33% Glycerine and water mixture against pure water.
| Identifier | ExFiles\Box 151\3\ scan0117 | |
| Date | 12th December 1929 | |
| Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}12/12.29 X5520 X7520 Y1435 ANTI FREEZING MIXTURES. Tests have been carried out on 20 HP. radiator comparing the mixture of 33% Glycerine and water, and pure water. As will be seen from the following figures, no difference could be detected between these two conditions either for hill climbing or high speed work. SWINSCOE HILL. Full Throttle 30 m.p.h. Average of 3 runs. Air Temp. 6°C. 4 Galls. Water Only. 10 Pints Glycerine & 22 pts. Water Time Water Water in mins. temp. Temp. Start 70°C. 70°C. ½ 71.6 71 1 73.4 72.6 1½ 74 73.6 2 74.8 74.5 2½ 75.5 75 3 76 75.6 3½ 76.5 75.7 4 76.3 75.8 4½ 76.3 75.5 3rd. Gear. 43 m.p.h. Distance 6 miles. Water & Glycerine 79°C. OUT. 74°C. IN. Water only 78°C. | ||