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 showing the tuning chamber on a V-8 exhaust tail pipe.
| Identifier | ExFiles\Box 179\3\ img133 | |
| Date | 2nd April 1932 guessed | |
| TUNING CHAMBER TUNING CHAMBER ON V-8 EXHAUST TAIL PIPE. A1061 | ||