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 memorandum suggesting slight modifications for a carburetter design.
| Identifier | WestWitteringFiles\L\Jan1924-March1924\ Scan111 | |
| Date | 2nd February 1924 | |
| COPY. TO E.{Mr Elliott - Chief Engineer} FROM R.{Sir Henry Royce} SECRET. R1/M2. 2. 24. C. to CJ. re. CARBURETTER FOR EAC. X9080 RG.{Mr Rowledge} DA.{Bernard Day - Chassis Design} 1810. These seem quite satisfactory, and I can only suggest the following slight modifications:- (1) Owing to the spring andbroached guide for the low speed restrictor the whole air port etc has to be made higher with some disadvantage as well as weight and cost. Could this guide piece go inside? It would be an advantage if it were loose for broaching and could be combined with the washer under the regulating nut, which ought not to turn round for fear of varying the mixture. (2) The threads on the restrictor rods, the nuts or which are frequently moved, might have threads of larger dia. so as to give more area both in dia. and length, and make the taps less delicate. (3) The top of the high speed throat might be rounded as well as the taper and restricted motion. (4) The spring plunger at the bottom of the high speed restrictor could be coarser in design; principally increased in length. (5) The thread on the reduced part of the air port would go through if (1) can be done. I don't quite like it as it is shewn. Anyway a much wider chamber would be needed, but get it all to the minimum sizes and length, so that it can be of ample thickness to be robust, without being heavy and clumsy. R.{Sir Henry Royce} | ||