Rolls-Royce Archives
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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
  
  


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