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).
Material change and lightening modification for a Bentley Clutch pressure member.
| Identifier | ExFiles\Box 85\2\ scan0053 | |
| Date | 6th December 1933 | |
| [Handwritten Signature] To E.{Mr Elliott - Chief Engineer} from Da.{Bernard Day - Chassis Design} c. Hs.{Lord Ernest Hives - Chair} Bentley Clutch. ---------------- Pressure Member. ---------------- Referring to the Pressure Member in N.C.I. which broke on production, we wish to try this as a steel forging. The flywheel being .6% carbon steel, it is considered that there is a fair chance of the pressure member sliding in the flywheel without picking up, if the former is in either M.S. or N.S. Herewith is N. Sch.3900 showing the forging lightened by drilling holes. The larg lightening holes it is suggested could be done with the same tool that now makes the spring recesses, and the smaller lightening holes are simply drilled. By varying the depth of these latter the piece could be balanced. It is suggested that one each should be made in M.S. and N.S. These could then be got immediately on the experimental cars. Da.{Bernard Day - Chassis Design} | ||