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).
List of modifications for the G.CD.161 Overdrive Gearbox on a Bentley 11A chassis.
| Identifier | ExFiles\Box 99\4\ scan0135 | |
| Date | 1st November 1937 | |
| 2006 DA.{Bernard Day - Chassis Design}2/C.1.11.37. 428. C. Dept. P. Dept. T. Dept. SY. Dept. C. RM.{William Robotham - Chief Engineer} CT. MRC/CAW BENTLEY 11A. CHASSIS. GEAR BOX AND ACTUATING GEAR. SECTION 6040. 1st. and 3rd. MOTION SHAFTS. 2nd. MOTION SHAFT. Please receive herewith :- G.CD.161 Overdrive Gearbox. The main modifications in connection with the above are :- (1). Alteration to Gearbox Casting. (2). New First Motion Shaft with new Gear and Meshing Gear. (3). Two new Gears in place of the present 3rd Speed Gears. (4). New 3rd and 4th Sliding Piece .075 shorter than standard. (5). New Top Cover. (6). New Outer Cone Rear. (7). Modified Act. Mechanism for 3rd and 4th. DA.{Bernard Day - Chassis Design} | ||