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 for a Phantom II twin carburettor air silencer.
| Identifier | WestWitteringFiles\W\May1931-August1931\ Scan103 | |
| Date | 11th August 1931 | |
| PHAN. II TWIN CARB. AIR SILENCER. SILENCER TO BE MADE OF 22 S.W.G. (.028) BONNET 4 LOCATING TABS. 8.675 .96 .546 .5 6.15 7.2" .25" 6" 4.75" 3" 11 AUG 31 DERBY | ||