Cosmos 1: the first solar sail: The Planetary Society is developing and conducting a privately funded solar sail project with Cosmos Studios. The spacecraft will be developed, launched and operated in Russia.
Propulsion Research Center: (part of Marshall Space Flight Center). Gives details on current research projects.
Propulsion Tutorial: Explains the different propulsion systems that could be used to send humans to Mars.
Solar-Thruster-Sailor: Solar Sail with hybrid propulsion, using light pressure and ion thruster to produce thrust. Spacecraft Building System to build large, light weight space structures in a fast and simple way.
Swiss Propulsion Laboratory: Aims to develop systems to transport small civilian payloads into a low-earth orbit (LEO).
The Sunflower Project: A proposed space transportation system which consists of two parts: rotocrane moving in an atmosphere only, and sunflower moving in a space plasma. Description of the theory and state of development.
