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 silencer with detailed specifications for its components and assembly.
| Identifier | ExFiles\Box 169\3\ img085 | |
| Date | 30th November 1932 guessed | |
| SILENCER FOR 3 - PER II DOWNTAKE BUT MADE 1.750 SW CENTRAL TUBE 2 1/2" DIAM - 30" LONG 16.0" THIS SECTION DRILLED 64 HOLES .250 DIAM - 8 ROWS 4.0" 10.0" THIS SECTION DRILLED 64 HOLES .3125 DIA 8 - ROWS 6.00 FLANGE DRILLED 24 HOLES .250 DIA BLANK BAFFLE DRILL 1/4" CENTRAL TUBE TO BE DETACHABLE AT FRONT END ALL BAFFLES FIXED TO CENTRAL TUBE WITH CLIPS | ||