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).
Modification to the Bentley V air silencer to improve its silencing degree.
| Identifier | ExFiles\Box 152\3\ scan0289 | |
| Date | 28th February 1939 | |
| 1297 To By.{R.W. Bailey - Chief Engineer} c. to By/NS.{Norman Scott} Rm{William Robotham - Chief Engineer}/WYm.{G. Harold Whyman - Experimental Manager}17/JH.28.2.39. Bentley V Air Silencer. We have now found it necessary to slightly modify the air silencer on Bentley V and 50 cars to obtain the degree of silencer we expect on our products. The mod. consists of reducing the dia. of the inner pipe EB.4224 from 2.062" to 1.750". This means a slight loss in B HP but is the only alternative to a larger silencer whilst we continue to use the centre intake pipe to the carburetters. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} | ||