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).
Customer complaints of the Phantom III clutch not stopping.
| Identifier | ExFiles\Box 131\2\ scan0217 | |
| Date | 30th June 1938 | |
| 1113 also. 361 To Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} o.{Mr Oldham} to By.{R.W. Bailey - Chief Engineer} Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}11/JH.30.6.38. J.{Mr Johnson W.M.} Musken Esq. 3.BT.{Capt. J. S. Burt - Engineer}73. Re above customers complaint of clutch not stopping, we know that a number of Phantom III clutches do stop reasonably well, and by that we mean that 1st. or reverse can be engaged after a brief pause, without appreciable noise, and without resorting to the use of the synchro cones. When this cannot be done, we suspect mis-alignment of the engine and gearbox imposing a radial load on the oillite bush, or that the hardy disc may be out of truth, so that the oillite bearing has to force the shaft to run true. We are of course assuming that the run-out of the driven plate is not excessive, and this can be checked by ascertaining that the clutch spins freely by hand when the coupling shaft is disconnected. We are reluctant to create a precedent by making a clutch brake, such as was fitted to the Phantom II, as we think attention to the above points should reduce drag to reasonable proportions, furthermore, a clutch brake of appreciable power, would be detrimental to the synchro change. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||