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).
Requesting modifications for radiator matrix blocks on the 40/50 and 20/25 models.
| Identifier | ExFiles\Box 149a\2\ scan0129 | |
| Date | 11th March 1933 | |
| X4516 BY.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} c. to E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}1/KT.11.3.33. RG{Mr Rowledge} / PS2 / E / 26/4/33 4/5p ByLid MARSTON & HARRISON RADIATOR MATRIX BLOCKS. In order to take full advantage of the increase obtained by using the harrison ribbon type radiator, it is necessary to use considerably thinner matrix blocks than when using copper hexagon tubes. We have reached the stage on Peregrine and Densport where we know the minimum thickness we can use whilst retaining efficiency. On the Phantom II and 20/25 we are, however, still not in a position to take advantage of the opportunity to save weight and cost as we cannot, at the moment, use a thinner matrix than standard. Will you please issue to RHC.{R. H. Coverley - Production Engineer} modifications to - (1) The 40/50 radiator shell to take a matrix, 84 m.m. thick. (2) The 20/25 radiator shell to take a matrix 58 m.m. thick. It is very important that the bottom tank does not impede the water flow when using ribbon type matrices. The makers inform us that they do not think our latest modification in this respect on the P.II. bottom tank (Lec.3377) is sufficient. When modifications are made to the bottom tanks to suit narrower matrix blocks, will you therefore please bear this in mind and arrange for the minimum possible restriction to water flow. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} | ||