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).
Specification sheet for the 12.B.V. model, listing details for the gearbox, drivetrain, and electrical components.
| Identifier | ExFiles\Box 98\5\ scan0155 | |
| Date | 30th December 1938 | |
| HSD f.{Mr Friese} from Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester} c.c. to:- Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester} E.W.H. c.c. to:- A.G.E. c.c. to:- Da{Bernard Day - Chassis Design}/JD.{J. Draper - Frames} Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester}2/HH.30.12.38. SPECIFICATION FOR 12.B.V. GEARBOX. To By/CRL.{C. R. Lisson}2/E.7.9.38 No.E. Overdrive ratios, low 2nd. speed ratio (27/18) and Buick Type Synchromesh. PROP. SHAFT & UNIV. JOINTS. 1350 Type joints. (GCD.1061). REAR AXLE. PD.312. 40 m.m. half shafts. 10/43 ratio. FRONT HUBS. A.C. Brgs. front hubs. INSTRUMENT BOARD. To be decided later. BATTERY. DB.{Donald Bastow - Suspensions}2062. WIRING & FITTINGS. Waiting dashboard scheme Da{Bernard Day - Chassis Design}/JD.{J. Draper - Frames} STARTER MOTOR. Armature DW.650, Dw.198. Bearing brackets and Frame and Field winding to DCD.1068. This is to suit new brush gear with nuts and bolts. DRIVE. LOP.DB.{Donald Bastow - Suspensions}1679. | ||