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 results for a W.B. Harmonic Stabiliser, detailing frequency and vibration range under various configurations.
| Identifier | ExFiles\Box 118\2\ scan0144 | |
| Date | 8th December 1934 | |
| Hs{Lord Ernest Hives - Chair}/WB.{Mr Brazier/Mr Bell}8/KW.8.12.34. W.B. Harmonic Stabiliser. The frequency of the Stabiliser (removed from 27-EX) measured by attaching it to a variable speed joggling rig was as follows :- | | Complete as Supplied | Lead Weights removed | Lead Weights & Lower Spring Leaf removed | | :--- | :--- | :--- | :--- | :--- | :--- | | | | Stab. Nuts Tight Ø | Stab. Nuts Nipped | Stab. Nuts Tight | Stab. Nuts Nipped. | | Natural Frequency Oscillation/Min. | 580 | 720 | 670 | 700 | 630 | | Total Vibration Range Oscillations/Min. | 530-650 | 690-790 | 600-750 | 650-770 | 580-770 | Ø The nuts securing the bumper bar to the spring leaves were first fully tightened, and then the test repeated with the nuts just nipping the spring leaves. The normal amplitude, measured at the centres of the stabiliser weights, was .001". Hs{Lord Ernest Hives - Chair}/W.Bell | ||