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).
Letter to Clayton Dewandre Ltd. comparing the performance of different radiator core designs.
| Identifier | ExFiles\Box 150\2\ scan0068 | |
| Date | 4th July 1938 | |
| 1280. Experimental Dept. Rm {William Robotham - Chief Engineer} /Std.5/MH. {M. Huckerby} Messrs.Clayton Dewandre Ltd., Titanic Works, LINCOLN. 4th. July 1938. For the attention of Mr.S.E.Willet. Dear Sirs, We thank you for your letter of 29th. inst. including the charts Nos. L.685.B.1 and L.685.B.2 together with table showing a comparison between the Serck block and the Gallay block previously tested by us, and appreciate your willingness to carry out these tests for us. While we agree with your statement that the Serck block is lower in both dissipation and resistance than the Gallay, we think that your table as it stands does not prove this because the blocks compared were not of equal frontal area or volume. We have compiled the attached table from your charts L/609/B.1, L/608/B.1, E {Mr Elliott - Chief Engineer} /611/B.1 and L/685/B.1 comparing heat dissipation of the Marston Mk.VI, Harrison Mk.VI, Gallay and Serck cores on basis of (a) heat dissipation per unit of front area (b) heat dissipation per unit of volume, and (c) heat dissipation per unit of weight. In the case of the weight comparison we have not exact figures for the matrix weights, but have worked on the basis that the weights of the Marston, Harrison and Serck blocks were all approximately the same, i.e. 26 lbs. each. It will be seen that these comparisons were all made at the same static pressure drop across the matrix and not at the same total air flow - this is the only fair basis of comparison for an automobile radiator core since at a given car speed only a fixed amount of pressure head is available to force air through the cores. | ||