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).
Suitability of hand-wound versus electrical rotoscopes and the availability of a stroboscope.
| Identifier | ExFiles\Box 138\2\ scan0148 | |
| Date | 26th May 1938 guessed | |
| To Rm{William Robotham - Chief Engineer} 1163. Hand wound Ashdown rotoscope which we have is quite a good instrument, attached letter on electrical rotoscope indicates this is only luxury model of former & do not consider it is warranted. Together with the Stroboscope which we borrow off Aero people we are OK for these instruments. Rm{William Robotham - Chief Engineer} / SWDL{Len H. Swindell} | ||