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).
Report suggesting the re-introduction of counterweights on crankshafts to reduce high-speed roughness and vibrations.
Identifier | ExFiles\Box 25\3\ Scan356 | |
Date | 13th November 1928 | |
To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Tsn. c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to HG. E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Tsn1/LG13.11.28. HIGH SPEED ROUGHNESS AND OVERRUN VIBRATIONS. V634 I n the following report we give our reasons for suggesting that we should try counter weights once again on our car crankshafts to reduce high speed roughness. We go to rather great lengths in trying to justify this statement because we know that counter weights have been tried before by RR and then discarded, although we believe the object in view at that time was merely to save the bearings. As they probably brough on torsional vibrations, we may have been deluded as to their usefulness. Recent experiments that we have done to trace the cause of high speed roughness are described, and we also outline the efforts of some other firms along this line. Finally, we indicate what in our opinion is a more suitable type of crankshaft for high engine speeds. ------------------ | ||