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 of the co-efficient of friction with variable temperatures against a steel wheel.
Identifier | ExFiles\Box 141\3\ scan0151 | |
Date | 14th February 1933 guessed | |
TEST OF CO-EFFICIENT OF FRICTION WITH VARIABLE TEMPERATURES AGAINST A STEEL WHEEL. Temperature Spring Balance* Balance Wt. Co-efficient of Friction. 140°C - 284°F 75 70 .466 150 C - 302 F 75 70 .466 160 C - 320 F 75 69 .460 170 C - 338 F 75 69 .460 180 C - 356 F 75 68 .453 190 C - 374 F 75 68 .453 200 C - 392 F 75 67 .446 210 C - 410 F 75 67 .446 220 C - 428 F 75 67 .446 230 C - 446 F 75 68 .453 240 C - 464 F 75 67 .446 250 C - 482 F 75 67 .446 260 C - 500 F 75 67 .446 270 C - 518 F 75 68 .453 280 C - 536 F 75 68 .453 290 C - 554 F 75 67 .446 300 C - 572 F 75 69 .460 310 C - 590 F . 75 70 .466 Note - *S.B. 75 is equivalent to 33.3 lbs. per sq. inch of Rubbing surface. Surface speed approx. constant at 4600 ft./min. A recent test on "GANOLD" Lining showed a loss in thickness of .077" after 9 hours running. The work done during this time was 130,000,000 ft./lbs. Thus to wear down 1/8" this Lining would dissipate 211,000,000 ft./lbs. of work. | ||