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).
Technical note on controlling pressure growth using an oil pump, air vessel, and indicator valve for engine diagrams.
| Identifier | ExFiles\Box 79\3\ scan0013 | |
| Date | 15th February 1915 | |
| Contd. -2- R.R. 235 A (400) (S C. 536 15-2-15) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546. be varied by hand to just over-run the growth of the pressure caused by the successive openings of the indicator valve. I cannot see any other way of dealing with this at the moment than to roughly settle on a suitable pump speed for each part of the diagram, as one cannot observe the oil dripping into the engine cylinder. As you say, the oil pump can be stopped for recording declining pressures, but you can use the same air vessel for your oil supply by changing over the valve indicated in the sketch to a position between the air vessel and pump. It is understood, of course, that each pressure gauge will have a cut-off cock of its own. E.{Mr Elliott - Chief Engineer} | ||