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).
Procedure for setting the clutch fingers on a Phantom III when fitting a cushioned plate.
| Identifier | ExFiles\Box 93\3\ scan0357 | |
| Date | 18th August 1937 | |
| PER AIR MAIL W/P. To Sr/VA. from Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} c. Hd.{Mr Hayward/Mr Huddy} c. N. 312 Re. Phantom III. CLUTCH. Your telephone message of this morning re setting the fingers when fitting a cushioned plate has been handed to us. When using the standard R.R. setting plate which is .325 thick, allowance must be made for the fact that the cushioned plate is thicker than the standard plate G.84810. The procedure is as follows:- 1. Fit a packing ring .070 thick between the clutch cover and the flywheel. This dimension is not at all vital so long as the ring is of uniform thickness. 2. Fit the standard R.R. setting plate in position and set the fingers to - 1.060 for plates despatched from W. before Aug.2nd. 1.000 " " " " after Aug.2nd. This should give a setting of approximately .815 when the new plate is fitted. The actual figure for the finger setting may be arrived at as follows for plates having 6 cushion springs - 1. Measure the thickness over the facings with the plate uncompressed. 2. Subtract .050, which gives the approx. compressed thickness. 3. Subtract .325, which gives the difference between the plate compressed and the setting plate. 4. Multiply by 5, which is the finger ratio. 5. Add .815. This setting should give approx. .815 when the new plate is substituted for the setting plate. continued | ||