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).
Diagram showing the amplitude of oscillation due to harmonics of gas pressure torque at full throttle for an engine without a damper.

Identifier  ExFiles\Box 25\3\  Scan257
Date  10th April 1927
  
TORSIONAL VIBRATIONS :-
STD 20 R.R. WITHOUT DAMPER
DIAGRAM SHEWING AMPLITUDE OF OSCILLATION
DUE TO HARMONICS OF GAS PRESSURE TORQUE
AT FULL THROTTLE.
THE STD DAMPER DEALS EFFECTIVELY WITH
THESE EXCEPT THE OSCILLATION
AT 3300 R.P.M.
TORSIONAL DEFLECTION AT END OF CRANKSHAFT
DEGREES
'MASTER' VIBRATION
HARMONICS OF GAS TORQUE.
18TH.
15TH.
12TH.
9TH.
6TH.
ENGINE R.P.M.
M.P.H.
C.C.E.
10/4/27
  
  


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