Other
Florida International University: History of Rockets
A comprehensive site devoted to the history of rockets, with excellent illustrations interspersed throughout.
Other
Nye Thermodynamics: Basic Gas Turbine Theory
Outstanding information (and a lot of it) on gas turbine (jet) engines. Describes the history behind their development and the theory behind their operation. Well written and includes very informative graphics.
NASA
Nasa: History of Flight
How did we learn to fly? Resource takes users back through time to discover where the history of flight all started. Offers links to games, art and stories as well as activities.
Other
Smith College: Heron's Steam Engine
From the Smith College Museum of Ancient Inventions website. Description of Heron's invention of the aeolipile - a precursor to the steam engine. Includes a graphic depicting a replica of the device.