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).
List of performance criteria and testing mileage for an exhaust system and intake silencer.
| Identifier | ExFiles\Box 154a\3\ scan0225 | |
| Date | 4th April 1936 guessed | |
| EXHAUST SYSTEM & INTAKE SILENCER. (1) Freedom from booms and crackling. (2) Efficiency as an air cleaner. No power loss. (3) Suspension durability and freedom from rattles. (4) Freedom from scaling and cracking. (5) Overall weight. (6) Fish tail noise in confined spaces. 15,000 miles in France. 1,000 miles in London. | ||