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 manage crankshaft speed irregularities using flywheels and experimental setups.
| Identifier | WestWitteringFiles\I\September1922\ Scan4 | |
| Date | 26th April 1917 | |
| (2) The other way is to give the shafts a natural tendency 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 revolving parts can make the crankshaft turn more uniformly. Beware of this deceiving you. In conclusion, it may be possible in this demonstration to considerably increase the flywheel on the engine 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 reasonable 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 driving 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} | ||