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).
Specification sheet for the Wraith model detailing turning circle, ground clearance, and consumption figures.
| Identifier | ExFiles\Box 108\2\ scan0157 | |
| Date | 16th September 1938 | |
| SECRET. 600 W/S. To Cx.{Major Len W. Cox - Advertising Manager} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}3/MH.{M. Huckerby}16.9.38. WRAITH. Cx.{Major Len W. Cox - Advertising Manager}12/KW.14.9.38. The turning circle both left and right is 46½ feet. The ground clearance (lowest) under the rear axle is 8". It is correct to say that the petrol consumption is between 15 and 16 m.p.g. and the oil consumption is about 2000 m.p.g. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||