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).
Experiment with 'Perlit' brake shoe material.
| Identifier | ExFiles\Box 26\4\ Scan285 | |
| Date | 1st March 1926 | |
| X340S RHC.{R. H. Coverley - Production Engineer} c. HS.{Lord Ernest Hives - Chair} BY5/H.{Arthur M. Hanbury - Head Complaints} 1.3.26. Order Office have sent along to you one brake shoe pot T.1886, which has been made in special "Perlit" iron. The object of the "Perlit" process is to obtain close grained material which, whilst it maintains a fair percentage of carbon in solution, leaves the material fairly readily machined, and yet, owing to the uniformity of the material and the absence of Cementite, the material in question can stand up longer to wear and tear than the ordinary type of material. We would like you to try the experiment by having the brake shoe on the nearside, for instance, fitted up with "Perlit", the brake shoe on the offside with standard material. By this means we shall ensure, roughly speaking, getting the same brake applications and running the brakes under similar conditions. The material is only proposed of course for hand brake use on the New PhantomCodename for PHANTOM I. Whilst we are considering a new form of brake for the rear, I do not wish this to interfere with the experiment, as the experiment in question will have valuable results in regard to the possibilities of this material for use as cylinder iron. BY.{R.W. Bailey - Chief Engineer} | ||