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 detailing modifications to the EAC gearbox, engine support, and valve tappets.
| Identifier | ExFiles\Box 72\4\ scan0047 | |
| Date | 13th October 1923 | |
| X9220 To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} c. to CJ. BJ. S E C R E T. E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. R4/M13.10.23. POWER UNIT - X.9770 X.9320 X.9060 We are arranging to modify the EAC. gearbox so that it can be attached to the engine unit. This necessarily causes some considerable alterations and while doing so we have made some definitely better and simpler operating mechanism. We have in hand alterations to the method of supporting the EAC. engine, and cancelling the underframe. We are also carrying out modifications to the valve tappets of EAC. making them parallel instead of taper and fitting down on to collars to avoid expansion differences causing compression of the tappet guides and jamming of the tappets. Tools on the parts affected should be stopped if not completed. R.{Sir Henry Royce} | ||