Photo by Jeff Rubenstone for ENR Ricardo's flywheel can store power from an excavator's hydraulic system and then sent it back when needed using the hydraulic pump motor seen here on this acrylic model. Photo by Jeff Rubenstone for ENR The flywheel can be seen in the center of the housing cylinder, where it will be able to spin freely in a magnetic field. Related Links: ENR's Full CONEXPO Coverage Caterpillar Rolls Out Hybrid Excavator as Layoffs Hit Mining Division Engine manufacturer Ricardo normally doesn't go seeking attention from the press. While it supplies engines to everyone from the biggest
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.