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Gress Aerospace
Describes new technology for VTOL aircraft lift and control as developed by the company, with the emphasis on hovering with just two airplane propellers. Site contains 3D models, drawings, supportive video links and published technical papers.
http://www.gressaero.com
HEV Aviation
Alternative fuel aviation using solar, fuel-cell and electric power.
http://www.hevworld.com/
Power Optimised Aircraft
Information, news and downloads about a European project on the next generation of systems technology.
http://www.poa-project.com
Skyblazer - Roadable Aircraft
Skyblazer automatically converts from car mode to airplane mode and back, so you can fly and drive interchangeably, combining the speed of a jet plane, with the door to door convenience of an automobile.
http://www.haynes-aero.com
