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).
Series of questions regarding the theory and effectiveness of damper action on engine vibrations.
Identifier | ExFiles\Box 25\3\ Scan186 | |
Date | 25th November 1926 guessed | |
contd :- -2- Assuming the main critical vibration without the damper to occur within the speed range of the engine, does the damper effectively eliminate the 'master' vibration, if so, is this replaced by another vibration at a lower speed? Also, if a lower speed vibration is manifest, say when coil controlling springs are used, to the internal friction of the laminated springs relied upon, and found to be adequate to provide the necessary damping to make this vibration in practice unappreciable. We should be interested to know if our above reasoning as to the theory of this form of damper action is correct and an answer to any of the above questions would be much appreciated. Yours faithfully, | ||