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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 of two designs for Phantom II resonance silencers for a semi-expanding carburettor.

Identifier  ExFiles\Box 179b\2\  img177
Date  28th November 1932 guessed
  
P.II RESONANCE SILENCERS FOR SEMI EXPANDING CARBURETTER.
HS{Lord Ernest Hives - Chair} 780

3.5"
10.25"
2.813
5.875
HOLES AS ① & ②
CAPACITY OF RESONANCE PORTION OF SILENCER: 300 CU. INS.
POWER LOSS: NIL ON P II

15.0"
7.0"
5"
6.5"
2.687
4.5"
12 .5" DIA. HOLES
24 .5" DIA. HOLES
CAPACITY OF RESONANCE PORTION OF SILENCER: 240 CU. INS
POWER LOSS
.2687 DIA. INTAKE: 1.3 B.H.P AT 3500 R.P.M
.2562 DIA. INTAKE: 2.7 H.P. AT 3500 R.P.M
  
  


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