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).
Advantages of swivelling brake shoes and the rationale for persevering with their design.
| Identifier | ExFiles\Box 12\5\ 05-page294 | |
| Date | 22th May 1931 | |
| HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} X7360 R2/M22.5.31. C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} C. to BY.{R.W. Bailey - Chief Engineer} BRAKE SHOES. X.7360. X.5360. When the swivelling brake shoes were suggested it was realised that they would be very considerably better in the following points: (1) Easier to bed. (2) Not require re-bedding. (3) More consistent and longer life, at the same time acting so as to be much less liable to squeaks, much in the same way as the swivelling tip acts. It is realised that so far no brakes are entirely free from squeaks, which are occasionally due to some temporary change in the material, generally to water or atmospheric conditions, or to wear altering the bedding. It is for these reasons I am particularly anxious to persevere with the swivelling shoes. These, together with the ribbed and stiffer brake drums, are superior from all points of view to a brake of increased dimensions. They should maintain their braking efficiency. R.{Sir Henry Royce} | ||