Tests conducted on 'Halo' brake linings, with the segment in the centre of the shoe only.
| Identifier | ExFiles\Box 26\4\ Scan195 | |
| Date | 1st December 1923 | |
| R.R. 493 (40 H) (SL 12 12-7-23). J.H., D. {John DeLooze - Company Secretary} Handwritten: X4388 EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. {Arthur Wormald - General Works Manager} By. {R.W. Bailey - Chief Engineer} E. {Mr Elliott - Chief Engineer} Da. {Bernard Day - Chassis Design} EP. {G. Eric Platford - Chief Quality Engineer} PN. {Mr Northey} OY. 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. 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. [Drawing of a brake shoe segment with angles 66°, 56°, and 24° indicated] SUMMARY OF TEST. | Both shoes. | Wrapping shoe. | Non-wrapping shoe. | |---|---|---| | 13 } | 4½ } | 24 } | | 13 } 12.8 | 4 } 4.5 | 24 } 24.4 | | 13 } | 4½ } | 24 } | | 13 } | 4½ } | 26 } | | 12 } | 5 } | 24 } | |---|---|---| | 15 | 9.4 | 31.4 | 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} | ||
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).