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).
Blueprint chart showing the inlet valve timing and displacement for a Marmon engine.
| Identifier | WestWitteringFiles\J\March1923\ Scan23 | |
| Date | 7th May 1929 guessed | |
| INLET VALVE VALVE DISPLACEMENT IN INS: 0.450, 0.400, 0.350, 0.300, 0.250, 0.200, 0.150, 0.100, 0.050, 0.000 IN CENTRE CRANK ANGLES. 340, 360, 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300 MARMON ENGINE INLET VALVE TIMING. (STANDARD) 0.008 CLEARANCE I.C. O.C. 28° 41°30' 193°30' DURATION OF OPENING 193° 30' WITH 0.008 TAPPET CLEARANCE. 0.008 TAPPET CLEARANCE. | ||