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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).
Test results showing the deflection of a strengthened Bentley Slipper Flywheel Friction Plate under various loads.

Identifier  ExFiles\Box 85\2\  scan0113
Date  12th September 1934
  
+212

To E.{Mr Elliott - Chief Engineer}

Hs{Lord Ernest Hives - Chair}/WB.{Mr Brazier/Mr Bell}13/KW.12.9.34.

Bentley Slipper Flywheel Friction Plate
Lec.3304. Strengthened Plate E.59383.
---------------------------------------

With the cotton duck friction ring replaced by a steel disc of similar dimensions, a load was applied to the centre of the friction plate, and the deflection measured relative to the slipper flywheel - the pressure plate was not fitted.

Load Deflection
Lb. Ins.
-----------------------------
0 0
200 .001
400 .00175
600 .00225
800 .00325
1000 .00375
1100 .004

N.B. Test undertaken at Hk{Col. T. Harker - Sales}'s suggestion, p.p. E & By.{R.W. Bailey - Chief Engineer}

Hs{Lord Ernest Hives - Chair}/W.Bell.
  
  


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