We previously saw Antonov advocating the use of a dual-speed supercharger which allowed boost to be delivered effectively over a wider range of engine speeds. Antonov seems to be taking this dual-speed thing quite seriously, with a new range of gizmos that take advantage of mechanical-based gear shifting. Their latest idea is allowing belt-driven devices like alternators, water pumps, air-conditioning systems and other engine ancillaries to be driven by two-speed systems. A two-speed planetar