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 air speed through a radiator core against car speed for different matrix types.
| Identifier | ExFiles\Box 87\1\ scan0182 | |
| Date | 11th October 1935 | |
| SHEET 5 VARIATION OF AIR SPEED THRO' RADIATOR CORE WITH CAR SPEED. NOTE:- AIR SPEED THRO' CORE IS CALCULATED ON ASSUMPTION THAT THE FREE FLOW AREA OF MATRIX EQUALS THE FRONTAL AREA. AIR SPEED THRO' MATRIX (ON BASIS OF FREE AREA = MATRIX FRONTAL AREA) - FT/SEC CAR SPEED - M.P.H. 84 MM. MK V MATRIX 52 MM. MK V MATRIX 65 MM. MK V MATRIX FRONTAL AREA OF TEST BLOCK = 2 SQ FT WATER FLOW - 150 LBS/MIN. TESTS CARRIED OUT ON MARSTON MK V MATRICES BY MARSTONS ON THEIR RIG C.S.S 11/10/35 | ||