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).
Investigation into a harmonic vibration and a musical note relating to the side shaft and gearbox.
| Identifier | ExFiles\Box 75\1\ scan0004 | |
| Date | 24th January 1911 | |
| R.R. 300 (6 B) (W. 159. 24.1.11) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1411. 512 ROLLS-ROYCE LIMITED. INSTRUCTIONS. 19 To Order No. Customer's No. Re Howley side shaft Con. time which vibrates freely at about 225 (say) times per second and harmonically. The diaphragm which isolates the intermediate has a musical note but it is too high - it may be an accessory but not the prime cause. The column of air crossways in the box at This post [struck through] would yield the right note if it acted as a tube open at one end. There are openings at each end however - one for the shaft to pass through, the other for the change speed mechanism. But on running a box on the new gear-box rig I found that the latter aperture Signed This Sheet must be filed on completion of the work. | ||