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).
Tests of 'Halo' brake linings, with a segment in the centre of the shoe only.
| Identifier | WestWitteringFiles\K\December1923\ Scan56 | |
| Date | 12th July 1923 | |
| R.R. 403 (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} ORIGINAL EXPERIMENTAL REPORT. COPIES TO: RCJ BJ. WGR. By E.{Mr Elliott - Chief Engineer} Da{Bernard Day - Chassis Design} EP.{G. Eric Platford - Chief Quality Engineer} PN.{Mr Northey} CY. R2 Expl. No. 4388 REF. Hs{Lord Ernest Hives - Chair}/RB{R. Bowen}2/LGT.12.23. OBJECT OF TEST. Tests on 'Halo' Brake linings. Segment in centre of shoe only. TESTER. R.{Sir Henry Royce} Bolton. [Diagram of a brake shoe with angles 66°, 56°, and an arc of 24°] CONDITIONS. Initial r.p.m. of engine 1500 " " " drum 473 Final " " " engine 1000 " " " drum 315 Drum cooled by constant flow of water - no springs fitted to shoes. Every test made with drum cold. SUMMARY OF TEST. Both shoes. Wrapping shoe. Non-wrapping shoe. 13 } 4 } 24 } 13 } 4 } 24 } 13 } 12.8 4 1/2 } 4.5 24 } 24.4 13 } 4 1/2 } 26 } 12 } 5 } 24 } 15 9.4 81.4 Corresponding figs. for similar shoes lined with Ferodo We understand several firms are using this because of the increased coefficient of friction with this material. Hs{Lord Ernest Hives - Chair}/RB.{R. Bowen} | ||