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 clutch suitability for the Bentley III & 50 chassis, recommending a 10-inch clutch over an 11-inch one.
| Identifier | ExFiles\Box 112\1\ scan0016 | |
| Date | 5th August 1938 | |
| 812 also H12 To By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}18/JH.5.8.38. BENTLEY III & 50 CLUTCH. The LOP.GB.3793 and Arrg. GCD.518 call for an 11" clutch on the above chassis. We consider the 10" clutch most suitable for the Bentley, as the driven member has 23% less inertia. We are at present experimenting with the Long Type semi centrifugal clutch which is giving promising results. This is also a 10". The two clutches are interchangeable except for the drilling of the flywheel bolt holes, and consequently we see no justification for fitting the larger clutch. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||