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).
Testing Ferodo brake linings with varying positions on brake shoes.
| Identifier | WestWitteringFiles\K\December1923\ Scan32 | |
| Date | 1st December 1923 | |
| R.R. 403 (40 H) (SL 42 12-7-23). J.H.,D.{John DeLooze - Company Secretary} ORIGINAL 4254 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. 3409 3539. REF. Hsl/T4.12.23. OBJECT OF TEST. TESTER. Test of Ferodo brake linings with varying positions on brake shoes. R.{Sir Henry Royce} Bolton, 20 HP CONDITIONS. Initial engine revs. per min. ----- 1500 Initial brake drum R.P.M. ------- 473 Final engine R.P.M. ------------- 1000 Final brake drum R.P.M. --------- 315 } For each test. All readings taken with drum cold and cooled with constant flow of water while running. No springs fitted to shoes. SUMMARY OF TEST. B = both shoes. W = wrapping shoe only. N = Non-wrapping shoe only. Wt. in lbs. to obtain constant braking. | Standard shoes. (4) | Ferodo at centre of shoe only. (3) | Ferodo at pivot end only. (2) | Ferodo at toggle end only. (1) | |---|---|---|---|---|---|---|---|---|---|---|---| | B | W | N | B | W | N | B | W | N | B | W | N | | 18 | 12 | 31 | 16 | 10 | 31 | 20 | 13 | 44 | 22 | 7 | 32 | | 16 | 12 | 29 | 15½ | 8½ | 31 | 20 | 12 | 44 | 23 | 7 | 32 | | 18 | 11 | 32 | 14½ | 8½ | 32 | 18 | 13 | 44 | 23 | 8 | 32 | | 19½ | 13 | 27 | 15 | 10 | 32 | 20 | 13 | 44 | 23 | 7 | 31 | | 18 | 13 | 27 | 15 | 10 | 31 | 20 | 15 | 44 | 23 | 6½ | 31 | Average Wt. in lbs. | 17.9 | 12.2 | 29.2 | 15 | 9.4 | 31.4 | 19.6 | 13.2 | 44 | 22.8 | 7.1 | 31.6 | Hs.{Lord Ernest Hives - Chair} | ||