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).
Page discussing the principles of oil flow resistance through orifices in relation to hydraulic shock dampers.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan194 | |
| Date | 1st June 1926 | |
| Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LCl.6.26. -2- Contd. 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 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. | ||