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).
Outlining reasons against sheradising Dunlop wire wheels before enamelling.
| Identifier | ExFiles\Box 159\1\ scan0107 | |
| Date | 4th October 1923 | |
| X. 3962 BY16-P4.10.23. Hs.{Lord Ernest Hives - Chair} WIRE WHEELS. With reference to your proposal to sheradise the whole of the Dunlop Wheel, including the spokes, before enamelling, there are two reasons against this at the moment;- 1. It is very difficult to make a baking enamel adhere to a surface which has been treated with zinc. 2. Whilst we have done a fair amount of sheradising it has always been to objects which are not highly stressed. In this connection, however, to find whether sheradising does affect the strength of the part, making it more liable to set up a crack in the first instance, I am having a series of valve springs sheradised. I propose to put these on our valve testing rig in order to check whether they fail sooner than unsheradised springs, but if they do not then sheradising is a possibility on a large number of high tensile parts as a prevention against rust. The relation of this experiment to your proposal is the question of sheradising the spokes of the wire wheel which carry a very considerable load in tension. BY.{R.W. Bailey - Chief Engineer} By | ||