Blueprint detailing two designs for Phantom II intake resonance silencers for a semi-expanding carburetter.
| Identifier | ExFiles\Box 102\1\ scan0100 | |
| Date | 28th November 1932 guessed | |
| P.II INTAKE RESONANCE SILENCERS FOR SEMI-EXPANDING CARBURETTER. HS {Lord Ernest Hives - Chair} 781 A ① 5.625 9.50" 20 .250 DIA HOLES. 2.625 2.437 4.0" 20 - .5 DIA HOLES. CAPACITY OF RE PORTION OF SILENCER 139 CU. INS. POWER LOSS 6 B.H.P. ON 160 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 170 CU. INS. POWER LOSS 1% AT 3500 R.P.M. P.II. | ||
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).