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).
Identifying the source of a whistle on B.V. and B.50 models and proposing a solution by enclosing shutter blades.
| Identifier | ExFiles\Box 97\2\ scan0097 | |
| Date | 20th July 1939 | |
| To By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} 450 + 800 Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}1/JH.20.7.39. Whistle on B.V. and B.50. The mysterious whistle which is apparent on all our B.V. and B.50 models has finally been traced to the air stream action round the centre lamp on to the sharp back edge of the fixed shutters. Only two shutters blades are effected Nos. 5 either side of the centre, and for the lower 12". We suggest that these shutter blades be totally enclosed at the rear as per sketch so cutting out the sharp edges. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||