See also:

• Science: Technology: Acoustics, Ultrasound and Vibration  (834)

Boeing Sikorsky RAH-66 Stealth Comanche Helicopter - - Information on the RAH-66 Stealth Comanche helicopter and the stealth technology used in it.

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.

Low Speed Aerodynamics Research Group, University of Glasgow - - Conducts wind tunnel research on topics including the aerodynamics of helicopter rotor blades. Includes facility descriptions, profiles of current projects, and some online data.

Swiss Helicopters by Markus Herzig - - News and information about helicopters of Switzerland.