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).
Stabiliser tuning, issues with a Wilmot Breeden Bumper design, and tests to prevent frame deflection.
| Identifier | ExFiles\Box 3\6\ 06-page286 | |
| Date | 24th October 1934 | |
| -2- HS{Lord Ernest Hives - Chair}/FJH{Fred J. Hardy - Chief Dev. Engineer},14/KW. 24.10.34. This shows that the stabilisers are tuned quite close to the frame frequency. A bad feature of the Wilmot Breeden Bumper is that the friction in the system is determined by the tightening of a nut, and the difference between a loose and a tight nut may alter the frequency of the bumper by as much as 100 cycles per minute. Design alterations are required to rectify this. Tests on this machine indicate that even with the bumper bar fitted the lamps are moving independently of the frame, and experiments are therefore being continued to find a light member which when fitted between the head lamps will prevent local frame deflection. HS{Lord Ernest Hives - Chair}/F.J.Hardy. | ||