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).
Improvements to axle bracket fixings and materials following a failure on the 4.EX car.
| Identifier | ExFiles\Box 49\1\ Scan314 | |
| Date | 23th May 1921 | |
| Contd. -2- Hsl/LG23.5.21. ************ because of the very heavy weight (4 tons). The method of fixing the axle brackets (which has been standardised) is a definite improvement over the scheme on 4.EX Car. The bolts are put in from the inside so that a proper square face can be obtained for the nut, also the bolts have lately been altered from mild steel to nickel steel. It may be argued, of course, that the conditions under which the brackets failed on 4.EX Car are conditions which must be met with in America, if so, then the brazed brackets might be retained for American cars. We believe, however, that under the conditions of the run from Buffalo to Cleveland, that if brazed brackets had been fitted, they would most probably have taken a set and jammed the brakes so that the car could not have been used. Hs. {Lord Ernest Hives - Chair} R.R.328A (50 T'S. L.H. 88C. 19-2-21) G.2004 | ||