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).
Test report on the effect of high temperatures on the wear and mechanical gain factor of a servo system.
| Identifier | ExFiles\Box 73\1\ scan0089 | |
| Date | 21th January 1924 | |
| EFFECT OF HIGH TEMPERATURES ON WEAR AND MECHANICAL GAIN FACTOR OF SERVO LOAD ON SERVO W = 10 1/2 LBS OR 100LBS PEDAL PRESSURE IN ALL TESTS. TABLE 1: CONDITIONS OF TEST: SERVO DRUM REVS 500 RPM DRUM COOLED AT TEMP OF BOILING WATER WEAR IN NOTCHES TAKEN UP PER HP HOUR ABSORBED BY LINING: - FRESH LINING: .4 NOTCHES - STRONGLY HEATED LINING: 3.3 NOTCHES MECHANICAL GAIN FACTOR OF SERVO: - FRESH LINING: 18 3/4 - STRONGLY HEATED LINING: 28 TABLE 2: CONDITIONS OF TEST: SERVO DRUM REVS 2000 RPM COOLED AT TEMP OF BOILING WATER WEAR IN NOTCHES TAKEN UP PER HP HOUR ABSORBED BY LINING: - FRESH LINING: 1.1 NOTCH - STRONGLY HEATED LINING: 5 NOTCHES MECHANICAL GAIN FACTOR OF SERVO: - FRESH LINING: 18 - STRONGLY HEATED LINING: 25 TABLE 3: CONDITIONS OF TEST: SERVO DRUM REVS 500 R.P.M. DRUM NOT COOLED. ALLOWED TO ATTAIN PURPLE HEAT ONLY WEAR IN NOTCHES TAKEN UP PER HP HOUR ABSORBED BY LINING: - FRESH LINING: 1 NOTCH - STRONGLY HEATED LINING: 5 NOTCHES MECHANICAL GAIN FACTOR OF SERVO: - FRESH LINING: 19.2 (HIGH VALUE) - STRONGLY HEATED LINING: 29 GRAPH: Title: 500 R.P.M. DRUM NOT COOLED Y-Axis: MECHANICAL GAIN (from 10 to 40) X-Axis: TIME RUN MINS (from 0 to 5) Lines plotted: 1. LINING THAT HAS BEEN THOROUGHLY ROASTED 2. LINING THAT HAS BEEN ON RED HOT DRUM ONCE 3. NEW LINING DIAGRAM: Title: MECHANICAL GAIN P/W Note: 1 NOTCH = .001" WEAR PER SHOE (APPROX) Labels: P, W, TW | ||