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).
Clutch manufacturing faults, future clutch designs for Bentley, and experimental clutches on Phantom III cars.
| Identifier | ExFiles\Box 85\2\ scan0296 | |
| Date | 16th November 1936 | |
| -7- (3) Manufacturing Faults. These mainly consist of:- (a) Bad finger setting. (b) Driven plates irregular in thickness. (c) Outer diameter of cover not true to size. (d) Bad finish. (e) Pressure plate not flat. These points are being attended to by B. & B. Clutch for next 10,000 Miles Bentley. (1) Ventilated clutch type 10.A.S. with extra bearing area round the slots. (2) Cross cushion plate with .045 cushioning, faced with moulded material. By using N.Sch.4776 pedals there will be sufficient separation to accommodate this, since the ventilated casing has less spring than the present ones. (3) Pedals N.Sch.4776 - cantilever with good geometry. Since heavy pedal load is not a prevalent complaint at the moment on Bentley, we do not propose to increase the travel. (4) Ventilated clutch casing to Ex.25741, incorporating anti-whistle design recommended by B. & B. If the simple design on S.D.lv. does not whistle we shall use this. CLUTCHES ON EXPL. CARS. (1) Phantom III. 30-EX. Special B. & B. plate to N.Sch.4825 with extra rivets to fix facings. Ferodo No.6, obsolete pedals. 32-EX. At present old standard production (B. & B. plate with thick No.6.facings) to be changed to B. & B. cross cushion plate with .050 cushioning. Moulded facings. 10% weaker springs (Rm.{William Robotham - Chief Engineer}31) No oillite bush (Rm.{William Robotham - Chief Engineer}169) 33-EX - R.R.plate with.040 cushioning VH.20. 10% weaker springs Rm.{William Robotham - Chief Engineer}31. 34-EX Present production. R.R. plate with .030 cushioning Ferodo No.6. continued | ||