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).
The factors affecting oil flow resistance through orifices in hydraulic shock dampers.
| Identifier | ExFiles\Box 55\3\ Scan206 | |
| Date | 16th June 1926 guessed | |
| contd :- -2- fixed loading equivalent to 25 lbs/sqin. pressure. From technical books on the subject it appears that the resistance to oil flowing through orifices should be (a) Directly proportional to the viscosity of the oil (b) Directly proportional to the velocity of the oil. This is when the oil flow is small. When the oil flow increases above a certain point, the pressure required to force it through the orifice increases as the square of the oil velocity. This is due to turbulent flow losses, and xxxxxxxx energy loss due to sudden contraction and velocity of exit. From the figures we have so far obtained, it appears that this latter factor is the most important in determining the characteristics of the RR. hydraulic shock dampers. Hs {Lord Ernest Hives - Chair} /W.A.Robotham. | ||