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).
Comparative specification table for crankshafts used in 20 HP and Phantom I & II car models.
| Identifier | ExFiles\Box 14\2\ Scan043 | |
| Date | 3rd March 1925 | |
| R.R. CAR CRANKSHAFTS. TABLE HEADERS: PART No., DESCRIPTION, TYPE OF NOSE AND SPRING DRIVE, WEBS: SHAPE; WHETHER BEVELLED, OILING SCHEME, TESTED STIFFNESS LBS/DEG/RAD., CALC. STIFFS. x10^6 LBS INS/RADINNER, JOURNAL DIAS. OUTER/INNER, PIN DIAS. OUTER/INNER, PIN LENGTH, MAX WIDTH OF WEB, AXIAL LENGTH OF WEB, FEATURES. SECTION: 20 H.P. Row 1: E 57064, LATE STD. 20HP, KEY & TAPER STD. 20HP, PARALLEL SIDED. NOT BEVELLED AS ENDS., OIL CAPS. 1 HOLE .218 DIA IN EACH JOURNAL & EACH PIN., 16,550, 1.820, 2.000 / 1.250, 1.500 / .750, 1.880, 2.200, .790, E 52064 VIA EXPTS WERE COMMENCED ON THIS SHAFT 1) NEW OIL SCHEME 2) BIGGER DIA. 3) OVAL WEBS. Row 2: X4601, LEC 2427 & 2480, SPLINED 1-G-1 TYPE, OVAL. REVELLED AT 50°, INSERTED PIPES. 1 HOLE .218 DIA IN EACH JOURNAL & 1 HOLE .187 IN PIN., 26,100, 2.070, 2.125 / 1.375, 1.820 / .875, 1.880, 3.000, .725, 1) NEW SPRING DRIVE 2) CURTIS OIL SCHEME 3) LONGER JOURNALS & BIGGER DIA. 4) OVAL WEBS. Row 3: X2640, LEC 2448, KEY & TAPER STD. 20HP, OVAL. REVELLED AT 30°, AS X4601, , 2.310, 2.125 / 1.125, 1.500 / .750, 1.880, 3.000, .728, 1) SIMILAR TO X4601 BUT STIFFER. 2) STD SPRING DRIVE. Row 4: X2643, , KEY & TAPER STD. 20HP, OVAL. REVELLED AT 25°, AT X4601, , 3.020, 2.125 / 1.125, 1.750 / .875, 1.880, 3.250, .725, 1) LARGER PINS. 2) WIDER WEBS. Row 5: X4701, PRESENT STD. 20HP, KEY & TAPER STD. 20HP, OVAL. NOT BEVELLED., OIL CAPS. 1 HOLE .218 DIA EACH JOURNAL & PIN, , 2.110, 2.000 / 1.250, 1.500 / .750, 1.880, 3.000, .775, E 52064 WITH OVAL WEBS. Row 6: X8127, (10,000 MILES IN 12-G-8) Sch. 417. FUTURE STD. 20HP, KEY & TAPER STD. 20HP, OVAL. SLIGHTLY REVELLED AT 60°, AS E.Y.H.O.G.4, , 2.930, 2.125 / 1.128, 1.750 / .878, 1.880, 3.250, .725, E 57641 BUT WITH STD. OILING SCHEME SECTION: PHANTOM I + II Row 7: 78416, LATE STD. PHANTOM. ENC VII., KEY & TAPER STD PH., ALMOST PARALLEL. NOT BEVELLED., OIL CAPS. 1 HOLE .218 DIA IN EACH PIN & JOURNAL., 48,000, 4.26, 2.625 / 1.800, 2.125 / 1.125, 1.880, 3.250, 1.075, Row 8: 76226, Lec 2462 ENC XIV. CONTINENTAL PHANTOM., SPLINED 1-G-1 TYPE., OVAL. BEVELLED AT 32.5°., INSERTED PIPES. 1 HOLE .250 DIA EACH JOURNAL & .211 DIA IN PIN., 38,820, 3.88, 2.625 / 1.750, 1.875 / 1.125, 2.000, 3.200, 1.000, 1) NEW SPRING DRIVE 2) CURTIS OILING SCHEME 3) SMALLER PINS. ABANDONED. Row 9: 76878, Lec 2488, SPLINED 1-G-1 TYPE., OVAL. BEVELLED AT 28°., AS E 76726 BUT 3 HOLES PER JOURNAL, , 5.68, 2.625 / 1.500, 2.125 / 1.125, 1.880, 4.000, 1.000, E78216 WITH: 1) NEW METAL DRIVE 2) LONGER JOURNALS 3) NEW OILING SCHEME 4) WIDER WEBS. Row 10: 77245, LATE STD. PH., KEY & TAPER STD. PH., OVAL. NOT BEVELLED., AS E78216, , 8.89, 2.625 / 1.800, 2.125 / 1.125, 1.880, 4.000, 1.075, Row 11: 77498, PRESENT STD., KEY & TAPER STD. PH., OVAL. BEVELLED AT 25°., AS E78216, , 7.68, 2.625 / 1.728, 2.125 / 1.125, 1.880, 4.000, 1.000, E76878 WITH STD. OILING SCHEME. ALL S.S. CARS EXCEPT 2 LEX. HYDRAULIC OIL PIPE. Row 12: 78486, L.A. 2508 N.S.L.2447 Sch. 1095 ETC. 10. 10,000 MILES IN 1REX., KEY & TAPER STD. PH., OVAL. BEVELLED AT 25°., , , , , , , , , E78486 WITH STD. SCHEME. FLEX. HYDRAULIC OIL PIPE. BOTTOM NOTES: WHEN ISSUE NOTE IS MARKED X 8 MAY 1922 TSR 3/3/25 | ||