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).
Two diagrams showing a sectional elevation and a horizontal cut of a rotating port mechanism.
| Identifier | ExFiles\Box 31\2\ Scan132 | |
| Date | 26th September 1938 guessed | |
| DIAGRAM 1. A.{Mr Adams} B. C. D.{John DeLooze - Company Secretary} SECTIONAL ELEVATION DIAGRAM 2. INLET PORT. HEAD CUT ALONG THIS HORIZONTAL PLANE PLUG FITTED TO SEATING TO ACT AS LOCATING PIVOT WHEN ROTATING PORT | ||