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).
Issues and proposed tests for foot brakes, comparing ferodo and cast iron liners.
| Identifier | ExFiles\Box 26\4\ Scan022 | |
| Date | 22th July 1914 | |
| R.H. 225a (150 H) (W.W. 529. 2-7-14) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0670. 24714 To Hy.{Tom Haldenby - Plant Engineer} from R.{Sir Henry Royce} Copy to J.{Mr Johnson W.M.} Copy to By.{R.W. Bailey - Chief Engineer} Copy to Wor.{Arthur Wormald - General Works Manager} COPY. R15/P 22. 7. 14. x719 Foot Brakes. With reference to foot brake, although the ferodo liners appear to work very effectively and very silently, the expansion of the drum is such a serious matter, that I fear these brakes would be less reliable than with the cast iron liners. We are now therefore trusting to some benefit being obtained by:- 1. Change of leverage, 2. The wider strap and the cooling ribs. The change of leverage should be tested at once. Alteration to the width of the strap - We can scarcely expect any strap benefit, but we hope for considerable advantage from the cooling ribs. We also ought to urgently test the combination of alternate pieces of iron and ferodo. Let these pieces be about 2" or 3" of circumferential length alternately. In making the exact comparison, I suggested we might try just experimentally how these brakes would behave, if we introduced water into the inside every time the brake was put on. We also might try water on the outside, and also make | ||