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 engine amplitude in degrees against engine RPM for different spring drive and damper configurations.

Identifier  ExFiles\Box 132\1\  scan0139
Date  22th April 1939
  
B 60 WITH WRAITH SPRING DRIVE SET AT 15 LBS AT 17 1/2"
WRAITH III WITH WRAITH SPRING DRIVE SET AT 15 LBS AT 17 1/2"
B 60 WITH B 60 DAMPER SET AT 219 LBS FT/DEGREE
AMPLITUDE DEGREES.
ENGINE R.P.M.
JRS. 22.4.39.
  
  


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