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 with the 'Phantom' 4-wheel brake system, specifically poor friction on the equaliser link causing thumping.
| Identifier | ExFiles\Box 66\5\ scan0027 | |
| Date | 14th October 1925 | |
| R.R. 499A (50 H) (D.D. 31. 12-8-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8420 REF: HS {Lord Ernest Hives - Chair} 9/LG14.10.25. To R. {Sir Henry Royce} from Hs. {Lord Ernest Hives - Chair} c. to CJ. BJ. c. to RG. {Mr Rowledge} E. {Mr Elliott - Chief Engineer} c. to DA. {Bernard Day - Chassis Design} BY. {R.W. Bailey - Chief Engineer} c. to Wor. {Arthur Wormald - General Works Manager} 'PHANTOM' 4-WHEEL BRAKES. (5940 The scheme for providing friction on the equaliser link on the Phantom is very poor compared with the arrangement on the 'India'. At the time it was only looked upon as a temporary arrangement until a better design could be prepared. There was a N.sch. 1880 sent through but with this it is not possible to obtain the necessary amount of friction. We find that in order to overcome the brakes thumping, it is necessary that the friction should be equiv-alent to 90 in.lbs. We are finding that a number of cars in service suffer from the front brakes thumping which is caused by friction having disappeared. We recommend that an improved scheme is got out for the Phantom as soon as possible. Hs. {Lord Ernest Hives - Chair} MADE AT CROXLEY | ||