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).
Secret memo discussing three manufacturing schemes for the engine's front bearer tube, comparing cost and materials.
| Identifier | ExFiles\Box 65\4\ scan0038 | |
| Date | 1st March 1925 | |
| X8005 To E.{Mr Elliott - Chief Engineer} & BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} c. to CJ. BJ. DA.{Bernard Day - Chassis Design} RG.{Mr Rowledge} HS.{Lord Ernest Hives - Chair} S E C R E T. R2/MMO.3.25. E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. ENGINE - FRONT BEARER TUBE. X. 8005. The solid forging can go forward to BY.{R.W. Bailey - Chief Engineer} but I fear this will be expensive.. Our original tube ought to do if slightly strengthened, and brazing is avoided. It should be made in high duty steel properly heat treated. It might be possible to make this of a sheet metal pressing (hot) like a frame pressing: the section would be of good heat treated alloy steel of high EL. SEE ORIGINAL FOR SKETCH. But perhaps the sheet metal idea is O.K., if calculations are favourable, it would be the cheapest and lightest scheme. The solid one depends chiefly on the cost of boring. BY.{R.W. Bailey - Chief Engineer} could choose from the 3 schemes. The solid one could have the lug forged on for the vibration damper. R.{Sir Henry Royce} | ||