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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 comparing two designs for Phantom II intake resonance silencers for semi-expanding carburetters.

Identifier  ExFiles\Box 179b\2\  img178
Date  28th November 1932 guessed
  
P.II INTAKE RESONANCE SILENCERS FOR SEMI-EXPANDING CARBURRETTERS.
HS{Lord Ernest Hives - Chair} 781

5.625
9.50"
20 .250 DIA HOLES
2.437 +0"
2.625
20 - .5 DIA HOLES.
CAPACITY OF RESONANCE PORTION OF SILENCER
POWER LOSS
133 CU. INS
6 B.H.P. ON
130 B.H.P. AT
3500 R.P.M

2.5"
8.00"
2.687
5.875
HOLES AS ①
CAPACITY OF RESONANCE PORTION OF SILENCER
POWER LOSS
170 CU. INS.
1% AT
3500 R.P.M.
P.II.
  
  


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