Blueprint diagram showing a cross-section of a modified inlet valve.
| Identifier | ExFiles\Box 31\2\ Scan110 | |
| Date | 24th August 1933 guessed | |
| DIAGRAM 14 MODIFIED INLET VALVE. SECTION B.B. | ||
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).