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 decision not to use an 11' clutch on Bentley units, favouring the 10' version.
| Identifier | ExFiles\Box 112\1\ scan0017 | |
| Date | 26th October 1938 | |
| 812 also 412 To Da.{Bernard Day - Chassis Design} c. to By.{R.W. Bailey - Chief Engineer} c. to HP. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}29/JH.26.10.38. Flywheel & Clutch. B.III & 50. The L.O.P. GB.3793 calls for an 11" clutch, which for some reason was shown on scheme GCB.518. We do not want an 11" clutch on any Bentley, it has 31% extra inertia in the drive plate and costs 13/- more than the 10" which is entirely satisfactory on Bentley. An 11" clutch with flywheel G.1832 has been fitted to Unit B.III.4, will HP. please change this to flywheel GB.3115 and 10/ clutch, and also fit future Bentley units with 10" clutch pending alteration to the L.O.P. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||