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).
Supply and cost comparison of extruded copper tubes for radiators.
| Identifier | ExFiles\Box 38\2\ Scan147 | |
| Date | 14th April 1921 | |
| X 3456 EWT. for R.R. Inc. for the attention of OY. c. to Na.{Mr Nadin} c. to CJ. Hs{Lord Ernest Hives - Chair}11/LG14.4.21. X.3678 X.3456 EXTRUDED COPPER TUBES FOR RADIATORS. With reference to R5/G11.4.21. I take it that you will supply us with enough tubes to make three radiators. As soon as we have any definite dimensions, we will send along the size of the Goshawk tubes. As regards the cost, we should like to know exactly what the difference is, when using extruded copper tubes with round ends compared with English made brass drawn tubes. The figure of one-third of the price was only guessed at. Hs.{Lord Ernest Hives - Chair} | ||