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).
Continuation of a report on damper and shock absorber testing, noting observations on air vents, pressure, and arm twist.
| Identifier | WestWitteringFiles\S\June1928-August1928\ Scan072 | |
| Date | 9th July 1928 guessed | |
| contd :- -4- and also ascertained that the air vent is quite clear and that there is no leakage past the replenishing valves so that we think they are more representative than the original standard diagrams which incidentally were taken at a lower temperature. These latter diagrams [strikethrough]They[/strikethrough] are also on a larger scale. One rather interesting feature is that if we start the damper running from cold with no air vent, at first we get no positive pressu-re in the damper but after a few strokes the pressure rises sufficiently to produce the phenomenon. We give two diagrams indicating this (lX and X). Another point [strikethrough]xxxxxxxx[/strikethrough] we notice with the indicator is that the shock absorber arm twists under load giving a little bit of movement we were unable to account for, about .075 each end of a 2" stroke. This is possibly beneficial and acts as a cushion. As a result of these tests we feel we ought to protect the air vent as it does rather more than we have previously imagined and seems rather susceptible to at least partial blockage. All our tests appear to shew that the indicator is very reliable and we shall now proceed to test out the modifications that are being used by the American Co. HS{Lord Ernest Hives - Chair}/pm | ||