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).
Issues with Phantom III radiator matrices supplied by John Marston Ltd. and proposed inspection procedures.
| Identifier | ExFiles\Box 94\3\ scan0153 | |
| Date | 19th March 1937 | |
| To Hs.{Lord Ernest Hives - Chair} c. to RHC.{R. H. Coverley - Production Engineer} c. to Da.{Bernard Day - Chassis Design} 340 PHANTOM III. RADIATOR MATRICES We yesterday visited Messrs John Marston Ltd., Wolverhampton, for the purpose of discussing the question of apertures of waterways on these matrices as delivered to us. Messrs John Marston Ltd. admit that up to now they have made no thorough inspection to make sure that the waterways of either the Mk.V. or Mk.VI. matrices were fully open throughout their length - the closing up of the lower ends of the waterways has taken place mainly on the Ph.III. matrix and to a lesser extent on the 25/30. matrix at the corners, when the frames which Marstons use for passing the matrix off from a dimensional point of view are pushed over the matrix. They state, however, that our production people have not drawn their attention to this defect and have returned no matrices due to this defect - they therefore say that the blame for this trouble lies equally with us. They have agreed to check all matrices in the future for aperture of waterways by means of a gauge which will pass right through the waterway. They are making two such gauges and will supply one to us for checking purposes at these Works. We think that a great mistake has been made up to the present in having no definite inspection of radiator matrices sent in. We believe that the radiator Shop has at times complained of matrices not being to drawing, but they have corrected these deficiencies themselves - when the gap between the bottom tank and the matrix corners on the P.III. block became so bad recently that it was impossible to fit the tanks, the writer went into this point with Messrs John Marston and had the drawings corrected. At the moment, the radiator shop are complaining that the P.III. matrices are too short - the result being that when they attempt to build them up in their jig, the gap between the matrix and the top tank is of the order of .075". We think that the following procedure should be observed with production matrices. 1. All matrices should be inspected for all external dimensions and should be checked for aperture of waterways - the limit on external dimensions should be ± .020". Any matrices outside continued | ||