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).
Study on the effect of high temperatures on the wear and mechanical gain factor of a servo mechanism.
| Identifier | ExFiles\Box 26\4\ Scan235 | |
| Date | 21th January 1929 | |
| EFFECT OF HIGH TEMPERATURES ON WEAR AND MECHANICAL GAIN FACTOR OF SERVO LOAD ON SERVO W = 10½LBS OR 100LBS PEDAL PRESSURE IN ALL TESTS. CONDITIONS OF TEST WEAR IN NOTCHES TAKEN UP PER ½ HOUR ABSORBED BY LINING FRESH LINING STRONGLY HEATED LINING MECHANICAL GAIN FACTOR OF SERVO FRESH LINING STRONGLY HEATED LINING SERVO DRUM REVS 500 R.P.M. DRUM COOLED AT TEMP OF BOILING WATER 4 NOTCHES 3.5 NOTCHES 15¾ 20 SERVO DRUM REVS 2000 RPM COOLED AT TEMP OF BOILING WATER 4 NOTCH 5 NOTCHES 14 25 SERVO DRUM REVS 500 R.P.M. DRUM NOT COOLED. ALLOWED TO ATTAIN PURPLE HEAT ONLY 1 NOTCH 5 NOTCHES 10.2 HIGH VALUE 2 MECHANICAL GAIN 40 30 20 10 500 R.P.M DRUM NOT COOLED LINING THAT HAS BEEN THOROUGHLY ROASTED LINING THAT HAS BEEN ON REG. HOT ENDURANCE NEW LINING TIME RUN MINS 1 NOTCH = .0015" WEAR PER SHOE (APPROX) MECHANICAL GAIN P/W P W T.W W.A.R 21/1/29 | ||