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).
Report comparing the performance of different radiator types, specifically the Marston Mark III and Harrison matrices.
| Identifier | ExFiles\Box 149a\2\ scan0031 | |
| Date | 2nd July 1932 | |
| -3- Rs{Sir Henry Royce's Secretary}/L.11.3/MA.2.7.32.Cont'd.{John DeLooze - Company Secretary} (S) 30 M.P.H. Full Throttle. No Bonnet Ventilation. Maximum maintained water Temp: °C. Type of Radiator. Top. Bottom. Mean. R.R.Hexagonal. 65.7 58.4 62.05 Marston Mark III 56.8 48.8 52.8 Harrison 42.2 34 38.1 All these tests show an appreciable advantage when using the Marston Mark III matrix and a very remarkable superiority in the case of the Harrison matrix; the following table summarises the results in terms of percentage improvement over our standard copper hexagon base matrix. Conditions of Test. Improvement with Marston Matrix. Improvement with Harrison Matrix. Max: Speed Full Throttle Full Ventilation. 13.7% 42.5% 60MPH. No Ventilation 16.7% 32.4% 60MPH. Full Ventilation 15.2% 32% 45MPH. Full Throttle Full Ventilation. 12.5% 38.75% 30MPH. Full Throttle Full Ventilation 12% 35.1% 30MPH. Full Throttle. No Ventilation. 14.9% 38.6% Average of above conditions 14.1% 36.5% The Harrison radiator matrix has vertical water ways, is very dense and has a great deal of indirect cooling; we attribute its superiority to the two latter factors. | ||