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).
Graph comparing the performance of different types of matrix cores.
| Identifier | ExFiles\Box 150\3\ scan0059 | |
| Date | 6th May 1936 | |
| COMPARATIVE TESTS ON DIFFERENT TYPES OF MATRIX CORE. TESTS CARRIED OUT BY MESSRS CLAYTON DEWANDRE OF LINCOLN. Y-Axis: H.P. DISSIPATED / FT² / 100°F TEMP. DIFF. AIR INLET TO WATER MEAN. X-Axis: EQUIVALENT CAR SPEED - M.P.H. AIR INLET - 60°F WATER MEAN - 160°F Legend: ① MARSTON M.K. I CORE, 58MM DEEP ② GALLAY CORE - 50MM DEEP ③ MARSTON M.K. VI CORE, 58MM DEEP ④ HARRISON CORE + I.C. CORE SIMILAR TO ⑤ BUT MADE BY HARRISON RAD. CORPORATION OF U.S.A. | ||