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).
The change of taper on the Bentley Rear Axle Pinion to increase torque transmission.
| Identifier | ExFiles\Box 84\4\ scan0084 | |
| Date | 22th October 1935 | |
| DY.{F R Danby} c.c. Mr. Hives. Hdy.{William Hardy} WRO. [Handwritten signature] Rm{William Robotham - Chief Engineer} GRX [Handwritten] x202 Da.{Bernard Day - Chassis Design}1/HP.22.10.35. Bentley - Rear Axle Pinion. Herewith is N.Sch.4662 which shows a 1 in 8 taper on the pinion end instead of the 1 in 4 now standard. This is intended principally for use with the large bore Bentley, though this is now running with a 1 in 4 taper. By increasing the thread diameter at the same time, the taper transmits about three times the torque of the present taper, or rather more than twice first speed torque with the large bore engine. The Woodruff keys have also been increased. N.Sch.4662 herewith. Da.{Bernard Day - Chassis Design} | ||