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).
Graph plotting ball pin load against external pressure for a leather piston type at various RPMs.

Identifier  ExFiles\Box 179b\2\  img209
Date  14th December 1932
  
BRITISH MADE
J III REAR 40/40 LB NS{Norman Scott} 3497 LEATHER PISTON TYPE
HS{Lord Ernest Hives - Chair} 795
14.12.32.
1st STROKE
BALL PIN LOAD LB
300
200
100
EXTERNAL PRESS. LB/D'
5
10
15
20
540 R.P.M.
360 R.P.M.
180 R.P.M.
90 R.P.M.
CUP LEATHER
  
  


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