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).
The modification to a slipper for the starter motor drive due to issues with the existing clutch.
| Identifier | ExFiles\Box 75\5\ scan0057 | |
| Date | 6th May 1920 | |
| STANDARDISATION of CHASSIS PARTS. Description of Parts. Modification to slipper for Starter Motor Drive. Origin. The present clutch is unsatisfactory, it either slips excessively or seizes up. Experimental Test Report. The present clutch as arranged on the starter drive is faulty, there have been several cases of it slipping so that the starter would not turn the engine. There has been one case of the shaft breaking due to the clutch seizing up. Road Test Report. One clutch has been tested under all conditions on a car. We find that with the friction adjusted so that 450 lbs. pull is necessary on the chain before it slips gives the best results. Signature of Exp. Dept. that above is correct. E.{Mr Elliott - Chief Engineer} Hives. SIGNATURES, DATE, REMARKS Mr. JOHNSON., 26.5.20, Agreed Mr. ROYCE., 22.5.20., Agreed. FHR. call this slipper not clutch drive. Mr. WORMALD., 6.5.20., Agreed. WOR.{Arthur Wormald - General Works Manager} Mr. PLATFORD., 7.5.20., Agreed if O.K. in case friction surfaces get oiled. E.P. Mr. NORTHEY., 7.5.20., Agreed if tests are satisfactory. P.N. Mr. BAILEY., 8.5.20., Agreed. By.{R.W. Bailey - Chief Engineer} Mr. BARRINGTON., 6.5.20., Agreed. Mr. DAY., 7.5.20., Agreed. Da.{Bernard Day - Chassis Design} | ||