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).
Continuation of a document discussing methods for balancing propeller shafts and other components using a Trebel machine.
| Identifier | ExFiles\Box 148\4\ scan0014 | |
| Date | 3rd November 1932 | |
| -3- Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}2/WA.{Mr Wallis}3.11.32. Cont'd.{John DeLooze - Company Secretary} It is suitable for propeller shafts up to 6' long and will balance both crankshafts and flywheels with equal ease. The test piece with which the machine is demonstrated is a flywheel. The Trebel machine is handled in England by Jackson & Hunt of Birmingham and costs about £310. We recommend that correction for unbalance be effected by drilling the coupling flanges at the extreme ends of the propeller shaft. These flanges would of course have to be increased in size for this purpose. By carrying out the correction here least weight is required to correct a given out of balance couple. Greater accuracy is obtained on a balancing machine by correcting as near the supports of the machine as possible. For a propeller shaft these supports are necessarily outside the length of the shaft. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||