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 ① 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 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. | ||