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).
Instruction sheet detailing the contour specifications for an exhaust valve.
| Identifier | ExFiles\Box 21\4\ Scan038 | |
| Date | 25th February 1917 | |
| X3500 R.R. 26 10M Bks.) (SE 591 13-3-18). M.P. 189358 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Mr Hims Feb. 25 1917 Order No. Customer's No. Delage. bar. Contour of Valve Exhaust. camshaft 0° .585 5° .509 10° .595 15° .5105 20° .5105 25° .5105 30° .5105 35° .5105 40° .5105 45° .5105 50° .5115 55° .512 60° .5125 65° .5145 70° .5225 75° .5145 80° .5215 85° .533 90° .5495 95° .570 100° .596 105° .636 110° .6655 115° .703 120° .737 125° .758 130° .774 135° .7825 140° .785 145° .783 150° .777 155° .764 160° .747 165° .7225 170° .6945 175° .663 180° .627 185° .601 190° .573 195° .556 200° .541 205° .527 210° .5145 215° .515 220° .512 225° .5105 235° .5085 Signed This Sheet must be filed on completion of the work. | ||