by Richard Sheffield
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To the casual observer, how a helicopter flies is fairly obvious. The big propeller on top goes around and lifts the helicopter off the ground. Well, that's basically how it works, but in the course of getting from point A to point B there are a number of subtle forces and operations at work. In order to fully understand how the aircraft functions, and to master the flight skills necessary to be a great attack helicopter pilot, one must understand these various forces and operations.