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).
Technical memorandum discussing modifications to address axle 'dithering' and clutch take-up issues.
| Identifier | ExFiles\Box 49\1\ Scan214 | |
| Date | 30th August 1920 | |
| R.R. 199 (250T) (SD676 19-7-17) MP 18.865 Contd. -2- R4/G30.8.20. increased difficulty of getting a clutch to take up smoothly etc. In addition to this modification, you can fit to this car, the older thin leafed springs which may prevent the axle "dithering" on the road quite so much. You can also have a pair of wheels with tyres having more flexible walls to the outer covers, such as the English or Michelin type. Also, as the fourth variation you can increase the effectiveness of the rear shock dampers. I should be pleased if you would give your immediate attention to testing this phenomenon as far as we can, remembering that our car ought not to be worse than practically all othercars made with torque tube, or two torque rod control. in fact we should be better than many who are not so particular in getting the longest torque tube possible. I noticed on 6.EX that this car was practically particularly bad when driven backwards, the back axle "dithering" which phenomenon is, as you know, of the same origin. R.{Sir Henry Royce} | ||