Test report on a material's resistance to wear and coefficient of friction.
| Identifier | ExFiles\Box 26\4\ Scan328 | |
| Date | 20th October 1926 | |
| CONCLUSIONS. A material with a very good resistance to wear and a very constant coefficient of friction. N.P.I. ENGINEERING DEPARTMENT TEST MARK = DHQ.2. SENDERS MARK= T(L). The method of test and apparatus used was described in our Report of October 20th., 1926, ref. DOP/CJ. The material was supplied in one piece moulded to about 10" radius, measuring 8"7 long by 2.7/8" wide by 0"37 thick. From this, four strips each 3" x ¾" were cut for the test. Particulars of test strips. No. Dimensions: Inches. Thickness: Inches. Specific Gravity. Before test. After test. Before test. After test. DHQ.2.(a) 2.99 x .741 .377 .335 2.21 2.23 DHQ.2.(b) 2.98 x .738 .368 .318 2.23 2.29 DHQ.2.(c) 2.97 x .741 .359 .316 2.23 2.26 DHQ.2.(d) 2.98 x .740 .370 .321 2.21 2.23 .3685 .3225 2.22 2.25 Average wear = 0.046 inch. Area of Test Strips = 8.820 sq. inches. Duration of Test = 6 hours. Total work absorbed in 6 hrs = 72,220,000 ft.lbs.= 8,190,000 ft.lbs/sq.in. Average rate of absorption of work = 6.08 h.p. Wear figure = wear in inches for the absorption of one million ft.lbs.of work per sq. inch = 0.0056 inch. | ||
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).