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 of an Essex exhaust silencer.
| Identifier | ExFiles\Box 21\6\ Scan101 | |
| Date | 27th October 1933 guessed | |
| ESSEX EXHAUST SILENCER MADE BY AUTOMOTIVE FAN AND BEARING Co, MICHIGAN. U.S.A. GRAY AUTOFAN. 59" 19" 5" DIA. 24" 1.75" DIA. 71" THE DOWNTAKE PIPE IS LAGGED UNDER THE BONNET ONLY .048" MATERIAL (18 GAUGE) | ||