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).
Instructions for engine firing order, cam arrangement, and inlet valve contour data.
| Identifier | ExFiles\Box 21\4\ Scan037 | |
| Date | 25th February 1919 | |
| X3500 R.R. 26 10M Bks.) (SE 591 13-3-18). M.P. 189358 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Mr Hives Order No. Delay box Customer's No. Order of firing 1, 5, 3, 6, 2, 4 arrangement of cams, E.I.I.E. I.E.E.I. E.I.I.E. Contour of Valves camshaft Inlet. 0° .542 5° .5425 10° .546 15° .551 20° .559 25° .5745 30° .5955 35° .6215 40° .657 45° .6935 50° .732 55° .766 60° .7835 65° .801 70° .8125 75° .8135 80° .810 85° .8125 90° .8135 95° .810 100° .7975 105° .7715 110° .745 115° .7135 120° .685 125° .6495 130° .623 135° .599 140° .5715 145° .562 150° .553 155° .5505 160° .546 165° .542 170° .541 Signed This Sheet must be filed on completion of the work. | ||