Boeing Sikorsky RAH-66 Stealth Comanche Helicopter
- Information on the RAH-66 Stealth Comanche helicopter and the stealth technology used in it.
- http://www.abovetopsecret.com/pages/comanche.html

Helicopter Aviation
- This site deals with the aerodynamics of helicopters, instruction on how to fly helicopters, mechanical components, and helicopter maneuvers.
- http://www.copters.com/helicopter.html

How Helicopters Work
- Photos and many brief videos in this narrative help to describe helicopter controls, capabilities and complexity.
- http://www.howstuffworks.com/helicopter.htm

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.
- http://www.aero.gla.ac.uk/Research/LowSpeedAero/Lsamenu.htm

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.
- http://sun-valley.stanford.edu/~heli/