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§ 3.5.2 Long-Term Transport
§ 3.5.2.1 Tethers in vacuum
Tethers are a general topic area with multiple applications for propulsion and electricity generation. In the future, the PERMANENT website will discuss these concepts further. In the mean time, here are some links:
Tethers Unlimited, Inc., performs R&D on tethers. See www.tethers.com
A 1999 Scientific American article covers R&D to that point in time, at www.sciam.com/1999/0399space/0399beardsleybox3.html (Robert L. Forward and Robert P. Hoyt)
§ 3.5.2.2 Laser launch from Earth
The fundamental concept is a vehicle using the air around it for propulsion rather than carrying all its fuel with it, and getting the energy from a ground-based laser.
More information can be found by following leads in a 1999 Scientific American article at http://www.sciam.com/1999/0399space/0399beardsleybox4.html
The Lightcraft Technology Demonstrator website of the Air Force Research Lab is at www.pr.afrl.af.mil/technology/lightcraft/ltd.html
A few keywords used in association with this work are: "lightcraft", "laser propulsion" and "microsatellites". Current research is for propulsion of very small objects.
PERMANENT.com > Transportation > Vehicles - Longterm
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NOTICE:
PERMANENT needs a PHP / MySQL (actually, MariaDB) programmer. Are you a PHP / MySQL programmer interested in getting into space development as a career, or already working in space development? Or do you know somebody else who might be interested?
There is an ongoing process to update this website in 2019 with a target relaunch in 2020.
This website is actually very out of date. Much of the website text content was written in the 1980s to early 2000s, but that's a different matter. As regards PHP / MySQL, some offline databases go into the 2010s, as regards professional publications, engineers, companies, etc., and this is what we need programming help with. We are updating our databases on people, organizations, publications, and other things, for open source space development for all.
The current status is we have some working databases which we have been using internally for a long time for organizing professional publications, and to track people (authors, R&D people, other professionals, quality volunteers, journalists, etc.) and organizations. We want to put information online for the general public pending a security review of the programming code.
Step 1 is fixing some bugs in what we already have, the PHP code. It is functional, and been used a long time, but there are some bugs.
Step 2 will be improving the system. Some small improvements would help its usability.
Step 3 will be a security check for putting it online for the general public to be able to access and use, but with reasonable protection against hackers.
After Step 3, the main mission is accomplished, as regards PHP / MySQL, though of course we hope to keep people engaged and happy, and the sky's not the limit.
This is a volunteer, unpaid role at this point in time. A limited paid role would be considered on a tight budget, such as for at least bug fixing with some minor improvements, and/or a security review of our code before it goes online publicly. If you or one of your friends or associates may be interested, please send an email to spaceprogrammer at ... of course this domain.
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Reasons to do something yourself:
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