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).
Misleading cost comparisons between sand casting and die casting for guiding design policy.
| Identifier | ExFiles\Box 88\4\ scan0173 | |
| Date | 4th September 1936 guessed | |
| (2) sand casting in spite of the fact that a die casting is called for on the L.O.P. and also on no machining or drilling jigs being used. It is, therefore, clear that as a comparison of the costs of the two designs these figures are misleading, both from an ultimate cost point of view, and as a means of guiding design policy. I am strongly of the opinion that the standardisation sheet should show the estimated cost for a fully tooled up job, and if any other figures are given they should be suitably qualified. E.{Mr Elliott - Chief Engineer} | ||