FS Chopper Fever Expansion for MS Flight Simulator X/2004 - PC Engine and rotor drives on these choppers are accurately rendered and small but important items are featured including the Comms and Nav radio aerials The Robinson R44 and Schweizer 300CBi - a wide variety of models is included and users can select aircraft with one or two fuel tanks Both helicopters feature extremely accurate flight models that are fully optimised for realistic helicopter flying in Flight Simulator X Modeled from extensive research on the real aircraft, both helicopters look and fly exactly as they should. Both helicopters feature extremely accurate flight models that are fully optimised for realistic helicopter flying in Flight Simulator X.