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 detailing a modified inlet cam-form for a Bentley III engine, with lift measurement tables.
| Identifier | ExFiles\Box 100\3\ scan0027 | |
| Date | 24th May 1938 | |
| Top Right Corner: E-CD682 Main Diagram: .311 LIFT VALVE OPENING VALVE CLOSING BASE CIRCLE 1.000 DIAM. ROTATION -> APART FROM THE CAM-FORM THE CAMSHAFT IS NOT ALTERED. THE EXHAUST CAM LEADS THIS CAM BY 112 1/2° Left Data Table (Opening): CAMSHAFT DEGREES | CAM LIFT OPENING (INCHES) 0: 0 1: .000063 2: .000260 3: .000586 4: .001041 5: .001626 6: .002342 7: .003186 8: .004019 9: .005010 10: .005920 11: .006821 12: .007742 13: .008653 14: .009564 15: .010475 16: .011386 17: .012276 18: .013612 19: .015739 20: .018678 21: .022423 22: .026780 23: .032348 24: .038526 25: .045315 26: .053313 27: .061871 28: .070678 29: .079465 30: .088253 32: .105360 34: .122418 36: .138721 38: .154436 40: .169597 42: .184103 44: .197947 46: .211102 48: .223510 50: .235234 52: .246158 54: .256358 56: .265632 58: .274128 60: .281783 62: .288591 64: .294482 66: .299508 68: .303635 70: .306855 72: .309153 74: .310539 76: .311 Right Data Table (Closing): CAMSHAFT DEGREES | CAM LIFT CLOSING (INCHES) 78: .310563 80: .309262 82: .307098 84: .304064 86: .300183 88: .295460 90: .289905 92: .283534 94: .276363 96: .268408 98: .259690 100: .250231 102: .240053 104: .229181 106: .217643 108: .205465 110: .192677 112: .179308 114: .166378 116: .150759 118: .136044 120: .120680 122: .104902 124: .088746 126: .072245 127: .063878 128: .055834 129: .048513 130: .041919 131: .036038 132: .030884 133: .026452 134: .022743 135: .019756 136: .017491 137: .015949 138: .015130 141: .013754 143: .012837 145: .011920 147: .011003 149: .010087 151: .009170 153: .008253 155: .007336 157: .006419 159: .005502 161: .004585 163: .003668 165: .002751 167: .001834 169: .001032 171: .000459 173: .000185 175: 0 Bottom Information: SCALE 10% (AH Wotton 24.5.38) MODIFIED INLET CAM-FORM - BENTLEY III. THIS CAM-FORM (WHICH MODIFIES E.CD.167) IS DEVELOPED FROM VALVE LIFT CURVE E.CD.673. USING WRAITH III TAPPETS & ROCKERS. ROLLS-ROYCE LTD. PRINT ROOM MAY 24 1938 DERBY. E-CD682 | ||