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).
The need to redesign engine components like the rotary valve for improved efficiency and performance.
| Identifier | WestWitteringFiles\L\July1924-September1924\ Scan45 | |
| Date | 1st September 1924 | |
| R.R. 403A (40 H) (SL 42 12-7-28). J.H., D.{John DeLooze - Company Secretary} -5- EXPERIMENTAL REPORT. Expl. No. REF: Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG5.9.24. possible by altering the period and timing of the scavenging port. It seems, however, as if it will be necessary to completely re-design the rotary valve if any B.HP. is to be obtained or high speed work indulged in, as the mechanical efficiency at present is impossible. For thermal efficiency, the exhaust valve period and timing may require attention while the fact that the long transfer port is part of the combustion chamber will be bad for this factor. Piston friction will also be a serious factor at higher speeds. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||