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).
Manufacturing and fitting of the dumb iron end and 'U' bolts for spring attachment.
| Identifier | WestWitteringFiles\F\February1921\ Scan6 | |
| Date | 7th February 1921 | |
| To DA.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} -2- E1/35/2/21 Contd. been knocked out. The dumb iron end should be drop forged to the design shewn, and bolted and rivetted to the frame, after being brazed to the cross tube. Referring now to the attachment of the springs to the axle, Mr. Royce wishes to use the form of "U" bolt shewn, which is a great improvement on the old style of fitting, as the stress effects in the bend are a known quantity. These "U" bolts can be made from good material since round bar is employed instead of a drop forging. The semi-circular saddle pieces can be drop forged and machined in pairs. E.{Mr Elliott - Chief Engineer} [Stamp] Da.{Bernard Day - Chassis Design} FEB 7 1921 RECEIVED | ||