... That is an opinion, not backed up by any numbers Using orbital transfer using Weak Stability Boundary Theory methods shown during Hiten mission, along...
It isn't NOT possible, it's just not possible ...yet There's tons of space junk in orbit around Earth. There's not nearly enough material out there to start...
Far enough in the future, it might be necesary to clear debris from orbit. At that time, the driver will be safety rather than for construction materials. ...
... http://www.mtnbrook.k12.al.us/Images/Teachers/175/SPACE_JUNK1.ppt#262,7,Interest Rising as Sun Cycle Quickens ... Using low energy transfers to move junk...
... We can actually use oxygen as a working fuid, even at high temperatures, providing the container and seals are made out of aluminium and/or fibre glass. ...
... This works only in interplanetary space, outside the Earth's gravity well. Within, all orbits have a clearly defined energy (potential plus kinetic), and...
... Glass (fiber or not) and ceramics (alumina) might work, but building a glass engine is not a small feat, and ceramics is only slightly better. As for...
... I am at the other end of the system, using the Stirling engine to make the electricity. You can then go indoors and power what ever you want. A home made...
... It's usable with care, provided the temperature doesn't go too high, and it's lightweight. However impacts such as hammer blows can cause it to thermally...
... Oh, yes, sure. I was partly responding to the suggestion that electricity might be replaced by something else for driving the mechanicals. With electricity...
... Not correct this was used for the Hiten-1 and SMART-1 missions within earth's gravity well. May have to orbit the moon to achieve the plane change, but who...
... For a small and slow rover solar cells can make a good power source. Unfortunately solar panels would be too big and heavy for a man sized rover. A big...
... A method of making large solar panels and lenses is needed. Since the panels are static they do not need to be highly efficient but do need to be...
Bert - Unfortunately there is no viable case for private industry, of its own accord, to invest in the very long term effort of building a space elevator. ...
Oddly enough, there isn't as much of a benefit to a Lunar space elevator. Low-g electrically driven mass drivers can deliver most payloads into lunar orbit or...
Theoretically almost any gas or liquid can be used as a working fluid in a stirling engine. http://en.wikipedia.org/wiki/Stirling_engine Grotleg ! CH Check...
The Transcontinental Railroad, Panama Canal, and the Interstate Highway System, are all examples of government backed mega projects. Also the Suez Canal, and...
... True but in practice there are a couple of restrictions. 1. The fluid must not freeze during the long nights. This rules out many chemicals including...
Another approach is to sponsor a "X-prize" for the first proto-type orbiting ring system. BTW I believe we are talking billions not trillions to build a...
One idea I've been puzzling over for a few weeks is the idea of a vertical aerovator. It's basically a (say) ~200km diameter circular hoop (with spokes) and at...
... We are talking space junk in LEO. How do you get to the moon from there? Without energy? You display some profound misunderstanding about orbital mechanics...
... AFAIK, the material flux in solar wind is far too low to be practically exploited except where it has already impinged for millenia, thus the idea of...
... I have seen aluminum mentioned as lunar fuel, it is more common than magnesium and carries more energy (I think), although magnesium might be easier to...
... Space solar cells are well understood technology and in wide use. Lenses are not required, and AFAIK there is nothing special about space vs. terrestrial...
... I agree, tethers that dip into the atmosphere have a lot of potential. Ideally the tether would be in orbit and not require extra lift, but it would have...
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