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).
New rig to measure the periodicity and natural frequency of bumper bars for the 20/25 model.
| Identifier | ExFiles\Box 118\2\ scan0143 | |
| Date | 8th December 1934 | |
| X6522 To E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 7/KW. 8.12.34. We have got a rig whereby we can accurately measure the periodicity of bumper bars. This is rather interesting in that it shows what a large amplitude this device takes up when excited to its natural frequency. Attached are a few figures we got on the bumper bar for the 20/25. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||