» Helicopter Aviation - This site deals with the aerodynamics of helicopters, instruction on how to fly helicopters, mechanical components, and helicopter maneuvers.
» Helicopter Zone - Provides links to helicopter sites, animated helicopter GIFs, photographs, and downloads.
» How Helicopters Work - Photos and many brief videos in this narrative help to describe helicopter controls, capabilities and complexity.
» Hummingbird Project - Hummingbird is a small research helicopter, at Stanford University's Aerospace Robotics Laboratory, which navigates using an integration of the Global Positioning System with computer vision.
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