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).
Investigations and proposals for the EAC.7 frame tie layout, referencing several schematics.
Identifier | ExFiles\Box 14\8\ Scan006 | |
Date | 1st January 1926 | |
To BY.{R.W. Bailey - Chief Engineer} from DA.{Bernard Day - Chassis Design} c. to CJ. Hs.{Lord Ernest Hives - Chair} X.7380 DA{Bernard Day - Chassis Design}7/Ms.1.26. EAC.7. FRAME TIES. We send herewith N.sch.2098 shewing the layout of the EAC.7. tie-bars. We have investigated this layout diagrammatically and find that it appears to be the most suitable for the car without a body subframe, so that we expect that it will be adhered to until the subframe is standardised. When that happens we are suggesting to R.{Sir Henry Royce} that a modification to the tie-bars might be desirable. We have shewn on N.sch.2114 a diagram of the bending moments and deflections without a body subframe. On N.sch.2115 we have shewn a similar diagram for the same tie-bars with a body subframe, and on N.sch.2116 the proposed new form of tie-bar, which we think is lighter and gives the same or an improved result when a subframe is used. We have also shewn on N.sch.2117 a further suggested modification in which one of the queen posts is removed, effecting a further lightening and simplification. We are putting these diagrams up to R.{Sir Henry Royce} and expect that he will give us an indication of his preference in the course of a short while. In the meanwhile would you please work to N.sch.2098 as being the official tie-bar layout. DA.{Bernard Day - Chassis Design} | ||