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).
Table outlining specifications and changes for various chassis components across different production runs.
| Identifier | ExFiles\Box 161a\3\ scan0038 | |
| Date | 27th January 1939 | |
| - 5 - BY/NS.{Norman Scott}1/G.27.1.39. Sec. No. | Title. | LOF. No. | 1st. 50 Exp. Production Chassis. | 250 Production Chassis. | Wraith Type Gearbox. ---|---|---|---|---|--- 6050 | 2nd. Mot. Shaft. | | Type of Gear box not yet decided. | | 6070 | Reverse Gear. | | Type of Gear box not yet decided. | | 6080 | Change Gear Mech. | | | | 6081 | Hand Brake Mechn. | GB.4200. 14.12.38. | To LOP. | Les.{Ivan A. Leslie} to investigate question of Staybrite lever. | No change. 6091 | Rear Brake.Inter.Shaft. | GB.4248 14.12.38. | To LOP. | To LOP. | One lever deleted. 6110 | Propeller Shaft. | | Type of Gear Box not yet decided. | | Length of Prop. shaft. 6120 | Rear Axle. | GB.4315 14.12.38. | To LOP. | To LOP. | No change 6130 | Rear Brakes. | GB.4366 14.12.38. | To LOP. except for Brake linings. | To LOP. except for brake linings. | No change. 6150 | Rear Brake Equal.Gear. | GB.4435 14.12.38. | To LOP. except for equaliser lever on axle (see Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}14/JH.23.1.39.) | As 50 sets. | No change. | ||