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).
Letter to John Marston Ltd. regarding water flow specifications for a 20/25 HP car radiator.
| Identifier | ExFiles\Box 149a\2\ scan0007 | |
| Date | 17th February 1932 | |
| Y 4516. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}1/MA. February 17th, 1932. John Marston Ltd., Paul Street Works, Wolverhampton. For the attention of Mr. Dabrymple. Dear Sirs, We have pleasure in enclosing herewith blue print showing the water flow through our standard 20/25 HP car radiator (flow measured in the bottom water pipe). We should say the range over which we should prefer maximum efficiency would be between 1000 and 2000 engine R.P.M., equivalent to water flow of from 6 to 13 gallons per minute. We must apologise for the delay in letting you have this information, but we found it necessary to make and calibrate a venturimeter suitable for the job. If there is any more information which we can give you we shall be happy to oblige. Yours faithfully, FOR ROLLS ROYCE LIMITED. Print attached. | ||