Turbine and internal combustion engines for marine and aerospace vehicles; gas turbine engines for generating power and parts and fittings therefor and recorded software for operating the engines sold together as a unit; parts for gas turbine engines for generating power, namely, rim-rotors being composite rotating shrouds for maintaining compression within a turbine, ceramic blade turbine wheels, high-speed motors and generators, combustors, and heat exchangers; magnetorheological fluid actu...