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).
Diagram of a modified shape for inlet bends in a cylinder head, with valve dimensions and areas.
| Identifier | ExFiles\Box 31\2\ Scan111 | |
| Date | 24th August 1933 guessed | |
| MODIFIED SHAPE OF INLET BENDS IN CYLINDER HEAD. TRANSPORT. Lec. 3571 DIAGRAM 5. INLET VALVE IS 1.400 DIA - AREA = 1.540 SQ INS. VALVE STEM IS .3437 DIA - AREA = .092 SQ INS AREA OF VALVE OPENING = 1.458 SQ: INS: INLET. 1.350 1.000 RAD 2.500 RAD 7.000 RAD 19% INCREASE IN AREA | ||