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 Air Silencer.
| Identifier | ExFiles\Box 152\3\ scan0129 | |
| Date | 1st July 1938 | |
| Hs.{Lord Ernest Hives - Chair} 1055 28 CORRUGATIONS EQUALLY SPACED TOP HALF SHOWING END COVER REMOVED 3 LAYERS ROLLED FROM 1 SHEET TOP HALF-SECTION OF SILENCER ASSEMBLY 11 LOUVRES IN EACH ROW .218 PITCHES 16 MESH GAUZE 30 SWG (.0124) WIRE 8 WINDOWS EQUALLY SPACED 14 ROWS OF LOUVRES DEVELOPED VIEW OF LOUVRES PHANTOM II AIR SILENCER ROLLS-ROYCE, LTD. PRINT ROOM JUL 1 1938 DERBY. 5.810 DIAM -10 5.70 DIA 3.625 +10 .150 RADIUS 3.000 35° 1.00 2.25 2.00 RAD 2.65 DIA .325 RAD 1.080 | ||