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).
Front wheel brake testing, detailing issues with brake jaggering and attempted modifications.
| Identifier | WestWitteringFiles\K\October1923\ Scan81 | |
| Date | 12th July 1923 | |
| R.R. 493A (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} EXPERIMENTAL REPORT. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to Rg.{Mr Rowledge} c. to Ds. c. to BY.{R.W. Bailey - Chief Engineer} ORIGINAL Expl. No. 9940 REF: HS{Lord Ernest Hives - Chair}4/L029.10.23. S E C R E T. FRONT WHEEL BRAKES. X9940 We carried out tests on front wheel brakes with the original operating mechanism and without radius rods. We could not appreciate any difference in the brakes - they still had the same faults. We have tried using the strongest front springs we have (1300 lbs.) and adding three inverted leaves on the top. We found with this we still had the same fault of the brakes jaggering but the tendency for the steering to overrun was reduced. We have also tested with a modified operating mechanism to ensure that the brakes go off if there is any twist on the axle or springs. We enclose herewith a print showing this arrangement. We can by means of this fix the pull ropes in various positions. By fixing the pull 2" below the spring pad on the axle (as marked on the blue print) we get no brake jaggers so far, less effective braking but still good. We are not able to produce any jaggers in the backward direction. We only had our first test with this arrangement this afternoon so that we are not able to express very definite views. Hs.{Lord Ernest Hives - Chair} | ||