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).
Technical table comparing different car crankshaft specifications and features.
| Identifier | ExFiles\Box 14\2\ Scan041 | |
| Date | 3rd May 1929 | |
| R.R. CAR CRANKSHAFTS. Left Margin Text: 20 H.P. Left Margin Text: PHANTOM I & S.S. TABLE: Column Headers: - PART No. - DESCRIPTION - TYPE OF HOLE AND SPRING DRIVE - WEBS: SHAPE; WHETHER BEVELLED. - OILING SCHEME. - TESTED STIFFNESS WHOLE SHAFT LB.FT/1000° - CALC. STIFF. LB.INS. PER RADIAN - JOURNAL DIAS. OUTER/INNER - PIN DIAS. OUTER/INNER - PIN LENGTH. - MAX WIDTH OF WEB. - AXIAL LENGTH OF WEB. - FEATURES. Row 1 (20 H.P.): - Part No: E 57064 - Description: LATE STD. 20 HP - Type of Drive: KEY & TAPER - Webs: PARALLEL NOT BEVELLED - Oiling Scheme: OIL CAPS. 1 HOLE .218 DIA IN EACH JOURNAL & EACH PIN - Tested Stiffness: 16,380 - Calc. Stiff.: 1.820 - Journal Dias: 2.000 / 1.250 - Pin Dias: 1.500 / .750 - Pin Length: 1.800 - Max Width of Web: 2.700 - Axial Length of Web: .790 - Features: C-TORS. VIB. EXPTS. HAVE COMMENCED ON THIS SHAFT. Row 2 (20 H.P.): - Part No: 54601 - Description: LEC 2457 + 2480 - Type of Drive: SPLINED. 1-G-1 TYPE - Webs: OVAL. BEVELLED AT 15° AS ENDS - Oiling Scheme: INSERTED PIPES. 3 HOLES .125 DIA IN EACH JOURNAL. 1 HOLE .125 DIA PER PIN - Tested Stiffness: 26,100 - Calc. Stiff.: 2.010 - Journal Dias: 2.125 / 1.375 - Pin Dias: 1.800 / .875 - Pin Length: 1.800 - Max Width of Web: 3.000 - Axial Length of Web: .725 - Features: 1) NEW SPRING DRIVE 2) CURTIS OIL SCHEME 3) LONGER JOURNAL 4) BIGGER DIA 4) OVAL WEB Row 3 (20 H.P.): - Part No: 52640 - Description: LEC 2458 - Type of Drive: KEY & TAPER. STD. 20HP - Webs: OVAL. BEVELLED AT 30° - Oiling Scheme: AS 52601 - Calc. Stiff.: 2.310 - Journal Dias: 2.125 / 1.125 - Pin Dias: 1.800 / .750 - Pin Length: 1.800 - Max Width of Web: 3.000 - Axial Length of Web: .725 - Features: 1) SIMILAR TO ABOVE BUT STIFFER. 2) STD SPRING DRIVE Row 4 (20 H.P.): - Part No: 52643 - Type of Drive: KEY TAPER. STD. 20HP - Webs: OVAL. BEVELLED AT 25° - Oiling Scheme: AS 52601 - Calc. Stiff.: 3.020 - Journal Dias: 2.125 / 1.125 - Pin Dias: 1.750 / .875 - Pin Length: 1.800 - Max Width of Web: 3.250 - Axial Length of Web: .725 - Features: 1) LARGER PINS. 2) WIDER WEBS Row 5 (20 H.P.): - Part No: 54701 - Description: PRESENT STD. 20HP - Type of Drive: KEY TAPER. STD. 20HP - Webs: OVAL. NOT BEVELLED - Oiling Scheme: OIL CAPS. 1 HOLE .218 DIA EACH JOURNAL & PIN - Calc. Stiff.: 2.110 - Journal Dias: 2.000 / 1.250 - Pin Dias: 1.500 / .750 - Pin Length: 1.800 - Max Width of Web: 3.000 - Axial Length of Web: .775 - Features: E 52064 WITH OVAL WEBS. Row 6 (20 H.P.): - Part No: 55727 - Description: (10,000 MILES IN 14-A-13) SCH 9117. FUTURE STD 20 HP - Type of Drive: KEY TAPER. STD. 20HP - Webs: OVAL. SLIGHTLY BEVELLED AT 60° - Oiling Scheme: AS E 54064 - Calc. Stiff.: 2.950 - Journal Dias: 2.125 / 1.125 - Pin Dias: 1.750 / .875 - Pin Length: 1.800 - Max Width of Web: 3.250 - Axial Length of Web: .725 - Features: E 54643 BUT WITH STD OILING SCHEME Row 7 (PHANTOM I & S.S.): - Part No: 78216 - Description: LATE STD. PHANTOM. EFC. XII. LEC. 2427 + 2452 - Type of Drive: KEY TAPER. STD. PH. - Webs: ALMOST PARALLEL. NOT BEVELLED. - Oiling Scheme: OIL CAPS. 1 HOLE .250 DIA IN EACH PIN + JOURNAL. - Tested Stiffness: 45,000 - Calc. Stiff.: 4.126 - Journal Dias: 2.625 / 1.500 - Pin Dias: 2.125 / 1.125 - Pin Length: 1.850 - Max Width of Web: 3.250 - Axial Length of Web: 1.075 Row 8 (PHANTOM I & S.S.): - Part No: 76546 - Description: CONTINENTAL PHANTOM. LEC 2088 - Type of Drive: SPLINED 1-G-1 TYPE - Webs: OVAL. BEVELLED AT 32 1/2° - Oiling Scheme: INSERTED PIPES. 1 HOLE .250 DIA. EACH JOURNAL + .125 DIA EACH PIN. - Tested Stiffness: 38,820 - Calc. Stiff.: 3.86 - Journal Dias: 2.625 / 1.750 - Pin Dias: 1.875 / 1.125 - Pin Length: 2.000 - Max Width of Web: 3.500 - Axial Length of Web: 1.000 - Features: 1) NEW SPRING DRIVE 2) CURTIS OILING SCHEME 3) SMALLER PINS. Row 9 (PHANTOM I & S.S.): - Part No: 76878 - Type of Drive: SPLINED. 1-G-1 TYPE. - Webs: OVAL BEVELLED AT 25° - Oiling Scheme: R.S.E. 76876 BUT 3 HOLES PER JOURNAL - Calc. Stiff.: 5.68 - Journal Dias: 2.625 / 1.500 - Pin Dias: 2.125 / 1.125 - Pin Length: 1.850 - Max Width of Web: 4.000 - Axial Length of Web: 1.000 - Features: ABANDONED. E.78216 WITH: 1) NEW SPRING DRIVE 2) LONGER JOURNAL 3) NEW OILING SCHEME 4) WIDER WEBS Row 10 (PHANTOM I & S.S.): - Part No: 77245 - Description: LATE STD. PH. - Type of Drive: KEY TAPER. STD. PH. - Webs: OVAL. NOT BEVELLED - Oiling Scheme: AS E 78216 - Calc. Stiff.: 5.89 - Journal Dias: 2.625 / 1.500 - Pin Dias: 2.125 / 1.125 - Pin Length: 1.850 - Max Width of Web: 4.000 - Axial Length of Web: 1.075 - Features: E78216 WITH OVAL WEBS. Row 11 (PHANTOM I & S.S.): - Part No: 77498 - Description: PRESENT STD Row 12 (PHANTOM I & S.S.): - Part No: 78486 - Description: LEC. 2508 N.S.U. E447. SCH. 1095 EFC 10. 10,000 MILES IN 18EX. - Type of Drive: KEY TAPER. STD. PH. - Webs: OVAL. BEVELLED AT 25° - Oiling Scheme: AS E 78216 - Calc. Stiff.: 5.68. - Journal Dias: 2.625 / 1.500 - Pin Dias: 2.125 / 1.125 - Pin Length: 1.850 - Max Width of Web: 4.000 - Axial Length of Web: 1.000 - Features: E 76878 WITH STD. OILING SCHEME. ALL S.S. CARS EXCEPT 2 LEX WHICH HAVE OIL PINS. | ||