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 use and purpose of leather packings under rear springs.
| Identifier | ExFiles\Box 80\3\ scan0055 | |
| Date | 22th July 1914 | |
| RE LEATHER UNDER REAR SPRINGS - R8/P20714. J.{Mr Johnson W.M.} for R.{Sir Henry Royce} 22.7.14. Da{Bernard Day - Chassis Design}2/G22714. With reference to these leather packings, they have been in use for a long time, and were originally intended to accommodate any curvature in the bottom spring z plate when fitting to the table, though it has been found by experience that it is not necessary to provide for this. They are only .250 thick and are reduced if found necessary. Testing Dept. insist that when the spring is fitted, to the frame, the rear end shall be a certain distance below the top of the frame, which gives them approximately the necessary axle clearance. It is in obtaining this distance that the Erecting Dept. find the packings so useful, as they can easily be adjusted and new spring centre tables for two series ahead are machined, making allowance for this packing. Aluminium would certainly answer this purpose, though Works prefer leather, because it is more easily Contd. | ||