Comparing a 10-inch and 11-inch clutch for the Bentley III & 50 chassis, recommending the smaller size.
| Identifier | ExFiles\Box 99\1\ scan0081 | |
| Date | 5th August 1938 | |
| 412 also 812 To By. {R.W. Bailey - Chief Engineer} o. {Mr Oldham} 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 eccept 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} | ||
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).