Elastomeric components are part of that solution. Elastomeric bearings, isolators, and dampers have been enabling devices in the development of quieter, more comfortable, and more reliable aircraft, reducing both Direct Operating Cost, and interior noise and vibration, and thereby increasing the acceptability of helicopter transportation. A bearing is a mechanical device that accommodates dynamic motions. This results in smooth performance throughout the life of the part. The degradation of elastomeric bearings is gradual and fail-safe.
Elastomeric bearings are maintenance-free.
The elastomer in the bearing smooths the operation of the dynamic system, which inherently reduces vibration and often improves control system response. An Isolator is a device installed in a load path to minimize the transmission of dynamic loads or motions through it. Dampers are used to attenuate dynamic motions in the aircraft, most often in the rotor. Elastomeric dampers can be used with or without special fluids, which have the added advantages of more damping force for a given dynamic motion and consistent performance within wide ranges of temperature and dynamic motions. The three types of elastomeric helicopter components have similar inspection and care guidelines.