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).
Comparing a Harrison radiator matrix with another type, discussing construction principles, heat transfer, and weight savings.
| Identifier | ExFiles\Box 149a\2\ scan0036 | |
| Date | 7th July 1932 | |
| To FN. from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. Hy.{Tom Haldenby - Plant Engineer} E.{Mr Elliott - Chief Engineer} X4516. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/AD7.7.32. With reference to FN1/WT7.7.32, the only resemblance between the piece of matrix you sent us and the Harrison matrix we have been testing is that both cores are built on the strip principle i.e. instead of a number of different tubes, the waterways consist of strips of metal running from the top to the bottom of the radiator. We send you herewith a piece of the Harrison type radiator which please return. The feature of this matrix is that it has a very large number of indentations projecting into the air ways which produces turbulent flow and raises the heat transfer coefficient between the copper and the air. Furthermore, the density of the matrix is very high and it has a large amount of indirect cooling. This latter feature means that the matrix does not carry a great deal of water. When filled with water, the new Harrison type radiator matrix weighs exactly the same as our existing hexagonal tube matrix, so that for the same cooling efficiency we could use 30% of it so saving that equivalent weight. Will you please return the sample as it is the only piece we have for reference purposes. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||