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 of radiator performance tests conducted in France, comparing small and large dented hexagon radiators.
| Identifier | ExFiles\Box 16\2\ Scan028 | |
| Date | 1st August 1931 | |
| Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/ADX.8.31. contd. SUMMARY OF RADIATOR TESTS IN FRANCE. SMALL HEXAGON DENTED. 60 M.P.H. Air temp. 15°C. Level road. With shutters open Without shutters open. Water outlet temperature 69°C. 73°C. 70 M.P.H. Air temp. 19°C. Level road. Water outlet temperature 77°C. 78.5°C. Hill climbing on the Col de la{L. A. Archer} Fencille. Air temp. btm. of hill Air temp. top of hill Top water temp. Start. Finish. 20 17 80 85 20 17 80 88 All tests shutters open. LARGE HEXAGON DENTED. 60 M.P.H. Air temp. 19°C. With shutters open Without shutters open. Water outlet temperature 75°C. 78.5°C. 70 M.P.H. Air temp. 14°C. Level road. Water outlet temperature 75.5°C. 79°C. Hill climbing on the col de la{L. A. Archer} Fencille. Air temp. top of hill Air temp. btm. of hill Top water temp. Start. Finish. 13 18 80 85 16 20 80 90 | ||