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).
Tests carried out on Marston Mark VI and Harrison Vee bonded Bentley radiator matrices.
| Identifier | ExFiles\Box 87\1\ scan0159 | |
| Date | 31th July 1935 | |
| V40 To E.{Mr Elliott - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Std. c. to Wor.{Arthur Wormald - General Works Manager} c. to Da.{Bernard Day - Chassis Design} c. to By.{R.W. Bailey - Chief Engineer} c. to Hdy.{William Hardy} REPORT ON TESTS CARRIED OUT ON LATEST MARSTON MARK VI. & HARRISON VEE BONDED BENTLEY RADIATOR MATRICES. The matrices tested were as follows :- (a) Std. 58 mm. Marston Mark V.{VIENNA} matrix. (b) 52 mm. Marston Mark VI. matrix. (c) 52 mm. American made Harrison Vee bonded matrix (latest type). All matrices being of similar shape etc. The comparisons of these matrices were made at Brooklands on 3-B-1V. car, the conditions of each test being full throttle full speed - approx. 97 M.P.H. The constant values of the top and bottom water temperatures, the under bonnet temperature, and the air temperature were noted in each case and are shown on attached sheet, together with the"air temperature to boil" figure for each matrix. Conclusions. From attached figures it is seen that matrix (c) is the best one from a cooling point of view - matrix (b) being the next best - the American matrix dissipates 14.6% more heat and the Marston Mark VI. 9% more heat than our Standard matrix. The respective weights of the three matrices (a), (b), and (c) are 31.5 lbs., 29.3 lbs., and 26 lbs., respectively, so that the latter two show a weight reduction over the standard matrix, as well as an increase in cooling efficiency. In comparing the three weights, however, it must be remembered that tinned .006 waterways and tinned .004 centres are used in matrices (a) and (b) (as specified by us) whereas the american matrix uses untinned .003 waterways and untinned centres .004 - hence only (a) and (b) are directly comparable. Summary. We are consulting Messrs. Marston as to the possibility of improving their matrix to the degree of efficiency of the American matrix and will carry out further tests on the Mark VI. matrix with a view to utilising it for Bentley and SpectreCodename for Phantom III | ||