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).
Note on the efficiency of steering gears and the time taken for an oil film to squash out under load.
| Identifier | ExFiles\Box 28\3\ Scan083 | |
| Date | 11th December 1934 | |
| -2- Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}12/KW.11.12.34. It was noticed that the efficiency of the gear was considerably greater than the above figures immediately after the application of the load due to the presence of an oil film between the worm and its follower. This efficiency fell very rapidly to the figure for static conditions. An estimate of the time required to squash out the oil film is 3 seconds. This time of course varies with the load. In the case of the R.R. type steering gears this time would be of the order of 30 seconds. Hs{Lord Ernest Hives - Chair}/F.J.Hardy. | ||