Whistles in the Wraith exhaust system due to a shortened rear silencer.
| Identifier | ExFiles\Box 8\8\ 08-page40 | |
| Date | 5th May 1938 | |
| 623 r To By. {R.W. Bailey - Chief Engineer} c. to By {R.W. Bailey - Chief Engineer} /NS. {Norman Scott} Rm {William Robotham - Chief Engineer} /Wym. {G. Harold Whyman - Experimental Manager} 8/JH.5.5.38. Wraith Exhaust System. We have run across 2 instances of whistles in the Wraith exhaust systems i.e. 25.G.VI and WXA.2 This is caused by the lack of expansion area in the rear silencer, and has only shown itself since we shortened the rear silencer by 6.00". As this may be a cause of complaint in customers hand we suggest that we revert to the original length of silencer for production. Rm {William Robotham - Chief Engineer} /Wym. {G. Harold Whyman - Experimental Manager} | ||
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).