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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.
  
  


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