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).
Blueprint graph comparing the airflow of a standard head versus a large inlet valve head for the Phantom engine.

Identifier  ExFiles\Box 31\2\  Scan112
Date  29th August 1933 guessed
  
PHANTOM.
CURVE 1.
FLOW THRU PORT CU.FT./MIN
COMPARISON OF STANDARD HEAD - E.83538
& LARGE INLET VALVE HEAD - E.83906
AT 1/3 VALVE LIFT - i.e. .160" LIFT
PRESS. DIFFERENCE ACROSS VALVE - "Hg"
(1) —— STD. HEAD. E.83538
(2) —— LARGE VALVE HEAD - E.83906
  
  


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