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).
Radiator matrix materials, corrosion, and the results of a discussion with Marstons.
| Identifier | ExFiles\Box 105\1\ scan0238 | |
| Date | 17th January 1936 | |
| To By & E.{Mr Elliott - Chief Engineer} x340 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}12/KW.17.1.36. Radiators. Referring to Roy{Sir Henry Royce}/Ms.1/P.13.1.36. We had a long talk with Marstons about radiator matrices, and have also been in communication with the Repair Dept. to see if they have had any failures due to corrosion. We cannot find that we have had a single case where the Marston matrix has failed in service due to corrosion. From this it would appear that there is no danger in going to the .005" waterway strip tinned. The Americans, we understand from Marstons, use the .005" waterway strip untinned and trouble is negligible. Of course we use copper now and not brass. We would therefore recommend that when we go to the Mark V type matrix on the 20/25, we use the .005" tinned waterway strip and the .004" centre strip. If, however, we are going to the altered side plates at the same time, it is certain that we need both a bump test and a road test on the combination, and, as it would simplify production to bring in both at the same time, we are proposing to carry out such tests and in the meantime carry on using the Mark III type and use up the existing material. We think there is little or no danger of the large bore 20/25 being under-cooled with the present Mark III radiator. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||