Encyclopedia Britannica
World Book Student
Airplane Timeline
Airplane Effects
Air & Space: Smithsonian
NASA: History of Flight
Future Airplanes: Personal Volocopter
Future Airplanes: Hypersonic Jet
The Wright Brothers: The Invention of the Aerial Age
The Wright Brothers
NASA: Aerodynamics for Kids
"The Inventive Wright Brothers" primary resource set
BrainPop: Flight
History of Aviation