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 detailing the correct procedure for installing a new instrument gauge and conclusions from tests.
| Identifier | ExFiles\Box 44\2\ Scan124 | |
| Date | 17th May 1928 | |
| Messrs. Rolls-Royce, Ltd., Date 17.5.28. Page 2 We hesitate to draw your attention to simple matters, but it is our experience that in the installation of the gauge, very simple things have a bearing upon its performance. When installing the new instrument, we would ask you to be good enough to ensure that either the air line is uncoupled at both ends when the change is being made, and coupled up simultaneously, or else if the air line is uncoupled only at the front or dash-board end, it should be blown out (forty good strokes with a hand pump; compressed air will not do), before it is re-coupled up. It is obvious from the protracted tests which you have made with the gauge, that the installation is a satisfactory one, and the air line is dry. It will remain so until such time as a leak occurs, or the front end is uncoupled and the rear end coupled for any considerable period; we believe whether the car is in use or not. We conclude that no serious over-night losses were experienced during the test, and we concur with your opinion that the provision for the extra head has now been thoroughly proved a satisfactory solution. Furthermore, if the over-night losses which were previously experienced are absent, we are definitely of | ||