Brake shoe endurance test, detailing its performance, rolling action, and wear.
| Identifier | ExFiles\Box 26\4\ Scan200 | |
| Date | 1st December 1923 | |
| R.R. 493A (40 H) (RL 42 12-7-23). J.H., D. {John DeLooze - Company Secretary} Sheet 3. EXPERIMENTAL REPORT. Expl. No. 3409 REF:Hs {Lord Ernest Hives - Chair} /RB {R. Bowen} 1/LGS.12.23. Shoe X. Ferodo at toggle end only. On applying the brake in this case it was noticed that this portion of the shoe had a rolling action. Consequently the braking was effected by a narrow band of the lining only as shewn below :- light pressure on. brake hard on. Note :- This effect produced by mechanism and not by wrapping. Shoe X. Ferodo on both segments. We have run an 8 1/2 hrs. endurance test on this shoe. Load on axle tube lever 9 to 10 lbs. Average brake drum revs. under load - 236 - 395. It was found necessary to ease the load at intervals. After 4 hrs. running, brake squeaked badly and the engine had to be speeded up to maintain the average drum revs. Wear on shoe satisfactorilyeven but slightly in excess at centre of shoe. 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).