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).
Report page discussing the limits of instrument accuracy in detecting less important harmonics.
| Identifier | ExFiles\Box 132\1\ scan0129 | |
| Date | 22th April 1939 | |
| -2- Rm{William Robotham - Chief Engineer}/JRS.2/JH.22.4.39. The less important harmonics i.e. the 2,6,10, the 1,5,9 and the 3,7,11 series of orders cannot be picked out on the curve, but these are small, probably less than the limits of accuracy of the instruments used. Rm{William Robotham - Chief Engineer}/JRS. | ||