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 report detailing clutch specifications and modifications for various vehicle models.
| Identifier | ExFiles\Box 85\2\ scan0297 | |
| Date | 16th November 1936 | |
| -8- Rm{William Robotham - Chief Engineer}/Smth.39/AP.16.11.36. 35-EX. As 33.EX., but with weaker springs Rm.{William Robotham - Chief Engineer}31. 36-EX. R.R. plate, .040 cushioning, VM.20 graphite. Flexible Hub Rm.{William Robotham - Chief Engineer}138. 37-EX. R.R. plate, .040 cushioning, VM.20. No Oilite bush (Rm.{William Robotham - Chief Engineer}169) Flexible hub Rm.{William Robotham - Chief Engineer}138. 38-EX. At first will have R.R. plate with .040 cushioning and Mintex, afterwards to have R.R. Long plate, .050 cushioning. RAD.11. and vacuum servo. Expts. in hand. Wider facings. Spring centre. Newton plate. Stiffer rear axles. Increased Pedal travel. Ventilation. (2) 25/30 18.G.IV. Old R.R. clutch. G.A.E.20 Present standard production. 22.G.V. Present standard production. (3) Bentley. 1.B.IV. At present standard clutch of early vintage with obsolete pedals. Shortly to be modified to have ventilated clutch. B. & B. plate with 35% extra cushioning, faced with VM.20, Ex.23741 anti-whistle type vent. clutch casing, N.Sch.4776 pedals. 3.B.IV. Ventilated clutch with simple vent. clutch casing, driven plate faced with English Hycoe with standard cushioning (.030) Standard pedals except for Rm.{William Robotham - Chief Engineer}149 lever given 13% less separation and pedal load. 20% stronger thrust springs giving total effect of 7% heavier pedal. 5.B.IV. Standard clutch. N.Sch.4776 pedals. When flexible flywheel was fitted had No.6. facings and stronger springs. continued | ||