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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).
Chart showing the performance characteristics of various materials tested on a Nitralloy drum.

Identifier  ExFiles\Box 141\3\  scan0272
Date  29th October 1931
  
CHARACTERISTICS OF VARIOUS MATERIALS ON N° 8 DRUM (NITRALLOY)

Top Graph:
- Y-Axis Label: μ
- Y-Axis Values: .325, .350, .375, .400, .425, .450, .475, .500, .525, .550, .575, .600, .625, .650
- X-Axis Labels: DURATION OF TESTS 1 HOUR, MINUTES, APPLICATIONS INTERMITTENT 5 secs ON & 25 secs OFF.
- X-Axis Values: 0, 2 1/2, 5, 7 1/2, 10, 12 1/2, 15, 17 1/2, 20, 22 1/2, 25, 27 1/2, 30, 32 1/2, 35, 37 1/2, 40, 42 1/2, 45, 47 1/2, 50, 52 1/2, 55, 57 1/2, 60
- Temperature Markers: 200°F.{Mr Friese}, 250°F.{Mr Friese}, 300°F.{Mr Friese}, 350°F.{Mr Friese}, 400°F.{Mr Friese}, 450°F.{Mr Friese}
- Line Legends: M.R. FEROBESTOS, F.B.A.D.P., F.B.A. STRIP., V.L.M. 20
- Note: WHERE LARGE VARIATIONS OF μ OCCUR, THESE ARE DENOTED BY THE DOTTED CURVES.

Bottom Graphs (CONTINUOUS TESTS):
- Graph Titles: F.B.A.D.P., F.B.A. STRIP., FEROBESTOS., M.R., V.L.M. 20.
- Y-Axis Labels: DEGS. F, μ
- Y-Axis Values (Temp): 100, 200, 300, 400, 500, 600, 700
- Y-Axis Values (μ): .15, .20, .25, .30, .35, .40, .45, .50, .55, .60, .65, .70
- X-Axis Label: MINUTES
- X-Axis Values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Corner Stamps:
- Top Right: B.T.D. / 29.10.31
- Bottom Right: DIAGRAM N° 149, 29.10.31, B.T.D.
  
  


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