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).
Methods to address engine crankshaft speed irregularities, including flywheel adjustments and experimental belt drives.
| Identifier | ExFiles\Box 183\M22\ img198 | |
| Date | 19th September 1922 guessed | |
| (2) The other way is to give the shafts a natural tenden-cy to slow down, and so follow the irregularities of the primary turning. If the engine is coupled up to the dynamometer, with fabric couplings, the extra inertia of the various re-volving parts can make the crankshaft turn more uniformly. Beware of this deceiving you. In conclusion, it may be possible in this demon-stration to considerably increase the flywheel on the eng-ine by coupling it to another flywheel. This could do much to prove whether your conclusions are correct, and how much extra flywheel would be necessary to give reason-able uniformity. In conjunction with these experiments we should be pleased if you would arrange to put a belt drive from the dynamo to the fan. (It need not be in the correct position relative to the radiator.) It might tell us whether such drive would help to quieten the gears driv-ing the dynamo, if it is found that the crankshaft speed is the cause of the irregularity, which naturally it would be difficult to overcome. R.{Sir Henry Royce} | ||