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).
Test report on the satisfactory performance of five instruments regarding damping, accuracy, and overload.
| Identifier | ExFiles\Box 168\5\ img175 | |
| Date | 14th February 1930 guessed | |
| II J.Q.55. The damping of the movement is quite satisfactory & is equally dead beat with the Elliott. All the instruments read correctly within 1% & shew no sign of stiction. An overload current of 90 amperes was passed through each instrument for 3 seconds in each direction & then retested for accuracy & movement. These points were satisfactory & so all 5 instruments have passed suitably passed the specification of test. G.J. | ||