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 design modifications and their completion status for the Wraith II chassis.
| Identifier | ExFiles\Box 161a\4\ scan0182 | |
| Date | 6th February 1937 guessed | |
| ITEM. WRAITH II CHASSIS. DESIGN POSITION. Mods to hand brake mechanism to reduce cost. In hand. Stiffened rear axle shafts - temporary scheme. Completed 17.12.36. Cheapened petrol filter. Completed 4.12.36. Hand holes in frame cross. Completed 17.12.36. Crankshaft with increased area journal bearings. Completed 14.12.36. Cheapened radiator. In hand. Gearbox. six splines instead of ten for 1st speed wheel, to reduce cost. Completed 30.12.36. Modified shock damper valve block - I.F.W.S. Completed 4.1.37. Investigation into changes of material for various gearbox parts, to reduce cost. In hand. Cheapened rear spring - aft shackle and dumb iron. Completed 23.12.36 Flat ended tappets - to reduce cost. In hand. Die cast aluminium end cover for 2nd and 3rd motion shafts for cost reduction. Completed 6.1.37. | ||