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  • Futurism,  Space Exploration

    Non-Rocket Spacelaunch – Advantages and Difficulties of a Launch Loop

    March 19, 2011 /

    This is the second part to the article on the launch loop from the non-rocket spacelaunch series. A complete list of all the articles in this series can be seen at the end of this post. A schematic of a launch loop as imagined by Lofstrom. Advantages of launch loops Unlike conventional rockets, launch loops can have many launches per hour, independent of weather, and are not inherently polluting. Rockets create pollution such as nitrates in their exhausts due to high exhaust temperature, and can also create greenhouse gases depending on propellant choices. Launch loops require power in the form of electricity and as such it can be clean. For…

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  • Futurism,  Space Exploration

    Non-Rocket Spacelaunch – Launch Loop

    February 8, 2011 /

    A launch loop (also known as a Lofstrom loop) is a proposed design for a very efficient non-rocket spacelaunch method. It is a much simpler concept than the space elevator, but still more complex than tether propulsion systems such as the rotovator. The launch loop concept was first described by Keith Lofstrom in November 1981 Reader’s Forum of the American Astronautical Society newsletter, and in the August 1982 L5 News. Another pioneer of the concept was Paul Birch. In 1982 he published a series of papers in the Journal of the British Interplanetary Society which described orbital rings and described a form of launch loop which he called Partial Orbital…

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