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).
Graph comparing the effectiveness of opposite halves of an inlet valve in a large valve cylinder head at full lift.
| Identifier | ExFiles\Box 31\2\ Scan116 | |
| Date | 29th August 1933 guessed | |
| CURVE 4 FLOW THRO' PORT CU.FT./MIN. PHANTOM FULL LIFT COMPARISON OF EFFECTIVENESS OF OPPOSITE HALVES OF INLET VALVE IN LARGE VALVE (E.83906) CYL. HEAD. (1) HALF OF VALVE NEARER TO COMBUSTION CHAMBER CENTRE MASKED (2) HALF OF VALVE NEARER TO COMBUSTION CHAMBER END MASKED PRESS. DIFFERENCE ACROSS VALVE - "Hg | ||