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).
Diagrams showing crankshaft torsional vibration at different RPMs for aluminium and cast iron pistons.

Identifier  ExFiles\Box 174\2\  img251
Date  11th July 1934
  
Top row:
1300
1700
2600
3500
Ex 1736
11/7/34
4000 R.P.M.
ALUMINUM PISTONS
No DAMPER

Bottom row:
1300
1700
2600
3500
Ex 1736
11/7/34
4000 R.P.M.
CAST IRON Pistons
No DAMPER
  
  


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