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 Wraith & R.V. Dynamometer drive, cross-referencing another file.
| Identifier | ExFiles\Box 97\2\ scan0070 | |
| Date | 13th May 1939 | |
| HPS{Horace Percy Smith - Experimental Factory Mgr} 400. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} 4/MH.{M. Huckerby}13.5.39. Wraith & R.V. Dyno. drive see file 600 | ||