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 The Cambridge Scientific Instrument Co. regarding inconsistent results from Stanton Test Machines.
| Identifier | ExFiles\Box 76\2\ scan0002 | |
| Date | 19th July 1917 | |
| R.R. 235 A (770 H) (S.I.) 442 9-5-17) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1965. X2128 X.1929. EFC11/T19717 19th July 1917. The Cambridge Scientific Instrument Co., Cambridge. Dear Sirs, We have now 3 of your Stanton Test Machines, and we would like you to give us details of the best method of mounting these machines, so that we shall obtain the same results from all of these. At present the machines are only roughly mounted on wooden benches and the speed probably vary from one to another, from 80 to 100 blows per minute. Our present results give variations of at least 20% between the machines on identical material. We are wondering how much of this may be due to the variation in the rate of the blows. Perhaps you would give us some information as to how the rate of the blows will effect the results, and if there is any satisfactory method of correcting the results on one machine running at the higher speed to be comparative with those obtained on another machine running at a lower speed. Yours faithfully, | ||