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).
Comparing the weight and material cost of the Wraith Replacement chassis with other models.
| Identifier | ExFiles\Box 109\4\ scan0040 | |
| Date | 13th January 1939 | |
| 666 also 658 Sg.{Arthur F. Sidgreaves - MD} from Rm.{William Robotham - Chief Engineer} Hs.{Lord Ernest Hives - Chair} c. HY.{Tom Haldenby - Plant Engineer} c. Da.{Bernard Day - Chassis Design} c. MX.{John H Maddocks - Chief Proving Officer} c. RBC. Rm{William Robotham - Chief Engineer}5/R.13.1.39. Attached is the weight of the Wraith Replace- ment chassis, compared with the existing Wraith chassis. We anticipate that the material cost of the Wraith Replacement will be very nearly the same as that of Bentley Ill if both are fitted with 6-cylinder engines. It is, therefore, satisfactory to note that 1 cwt. has been saved, and, at the same time, a reduction in material cost of £85, or 33% has been achieved. Rm.{William Robotham - Chief Engineer} | ||