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 axle shaft diameter for the B.50 and Wraith half-floating rear axle.
| Identifier | ExFiles\Box 111\4\ scan0013 | |
| Date | 29th December 1937 | |
| COPY. for file 802. 802. dso 602 Da{Bernard Day - Chassis Design}/HB.{C. E. Harcombe} c. Da.{Bernard Day - Chassis Design} c. Rm.{William Robotham - Chief Engineer} c. Da{Bernard Day - Chassis Design}/Hdy.{William Hardy} BY.10/G.29.12.37. B.50 and WRAITH. HALF FLOATING REAR AXLE. see 1015 see 802. Referring to Da{Bernard Day - Chassis Design}/HB.{C. E. Harcombe}87/G.16.12.37 after weighing up the information conveyed in Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}2/AP.25.10.37. and Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}5/MH.{M. Huckerby}22.12.37., I am satisfied that we should use 1.750 as the diameter of the axle shaft at the large end, where it fits into the ball bearing. This is possibly on the large side, but we must above all things be safe, and run no risk of fracture at this point. BY.{R.W. Bailey - Chief Engineer} | ||