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).
Wear test report on a material or component named 'SAFEGUARD'.
Identifier | ExFiles\Box 141\3\ scan0145 | |
Date | 14th February 1933 guessed | |
REPORT OF WEAR TEST ON "SAFEGUARD" Particulars of Pieces. Test Mark Dimensions Thickness Before After No. 1 2.968 x .739 .367 .331 No. 2 2.968 x .744 .371 .319 No. 3 2.983 x .737 .371 .313 No. 4 2.937 x .737 .373 .326 Average .370 .322 Average wear in inches = .048 Duration of Test = 5 hours Total area of test pieces = 8.765 sq. ins. Total absorption of work = 70,916,256 ft.lbs. = 8,090,844 ft.lbs/sq.ins. Rate of absorption of work = 7.16 H.P. Wear Figure = .00593 RECORD OF WEAR TEST. Time Load Speed Temp. at Co-efficient of Friction hr. - hr. lbs/sq.in. ft/min. end °C Max. Min. Average 0 - 1 13.68 4673 86 .433 .350 .391 1 - 2 " 4673 80 .450 .400 .428 2 - 3 " 4666 96 .450 .416 .433 3 - 4 " 4666 86 .466 .416 .441 4 - 5 " 4663 86 .466 .383 .424 Average 4668 .422 | ||