Renewable Energy : Solar Energy : Transportation

Wikipedia: Solar sail
Solar sails (also called light sails, especially when they use light sources other than the Sun) are a proposed form of spacecraft propulsion using large membrane mirrors.

Solar Vehicles
Design information and plans for solar, electric, and efficient vehicles.

Solar Powered UAV
Although solar aviation is nothing new, it is still considered to be in its infancy. The work done at the Technion as well as elsewhere around the world is starting to attract the attention of the aviation industry.