History
All the World's Rotorcraft, Blueghost Green, Helicopter History, Helicopter History Site, Helicopter Museum, Helicopters and Autogiros 1939 to 1945, Igor I. Sikorsky Historical Archives, Inc.
Organizations
AHS International - The Vertical Flight Society, American Helicopter Society, Army Aviation Heritage Foundation (AAHF), Helicopter Association International (HAI), International Helicopter Firefighters Association, Popular Rotorcraft Association (PRA), South Carolina Helicopter Association, Vietnam Helicopter Crew Member Association, Vietnam Helicopter Pilots Association (VHPA)
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
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.