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 showing the variation of cooling with matrix depth at various car speeds for Marston Mk IV Matrices.
| Identifier | ExFiles\Box 87\1\ scan0180 | |
| Date | 11th October 1935 | |
| SHEET (3) VARIATION OF COOLING WITH MATRIX DEPTH AT VARIOUS CAR SPEEDS (MARSTON MK IV MATRICES) FRONTAL AREA OF TEST BLOCK : 2.0 sq ft HEAT DISSIPATED / MIN / °C DIFF. TEMP BETWEEN INLET WATER AND INLET AIR TEMPS - B.T.h.U.s. DEPTH OF MATRIX - INS. CAR SPEED - 45.5 M.P.H. CAR SPEED - 40.8 M.P.H. CAR SPEED - 35.25 M.P.H. CAR SPEED - 28.8 M.P.H. CAR SPEED - 20.4 M.P.H. TEST MADE BY MARSTONS ON THEIR RIG. H.I.G / C.S.S | ||