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 detailing the internal structure of a Resonance Silencer.
| Identifier | ExFiles\Box 104\2\ scan0041 | |
| Date | 1st January 1932 | |
| 14-G-32 HS{Lord Ernest Hives - Chair} 646 BAFFLES BLANKS 2.850 DIA (INSIDE) SHEET 3 RESONANCE SILENCER C.T.S. | ||