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Rakaydos

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    Practical propulsion methods for manned interplanetary travel

    in Science & Spaceflight

    Posted · Edited by Rakaydos

    http://jpaerospace.com/ for the Airship to Orbit program.

    They're a bit slow updating, and they're early in the "learning to build edge-of-atmosphere loading docks" stage.

    (while they're at it, they offer "near space experimental payload space" to thousands of students, as long as their experiments fit in pingpong balls they dump in a hopper on their lifters)\

    Edit: they moved their regular updates to facebook, it looks like: https://www.facebook.com/jpaerospace?sk=wall

    Practical propulsion methods for manned interplanetary travel

    in Science & Spaceflight

    Posted

    It seems like the major stumbling block for a chemical mars mission is the expence of the large number of launches needed to build the craft, right?

    What if the cost of a launch could be dramatically reduced? like, dollars per pound cheap?

    One of the most interesting launcher proposals I've seen isnt a rocket at all- it's a chain of airships (designed for lower and lower pressures) that tranship cargo to low earth orbt over the course of about two weeks. The final stage is a multi-kilometer aerodynamic gasbag that could never survive winds near the surface, but never drops below the edge of the atmosphere. After receving cargo from the previous airship stage, it uses a high ISP low thrust system (plsma drive of some kind?) to move the airship.

    As the airship speeds up, it generates aerodynamic lift, which reduces atmospheric pressure, which reduces drag, which permits a higher top speed. At a certian point, you can replace "aerodynamic lift" with "orbital velocity", as you slowly work your way up to low earth orbit.

    Why aliens would be hidden from the public

    in Science & Spaceflight

    Posted

    In the book Agent to the Stars, aliens come, realize that they would be considered fundamentally revolting and destabilizing by the locals, and decide they need advice as to best revel themselves to the world. So they reveal themselves to a Holywood Agent. (someone who's job it is to get actors jobs)

    In the webcomic CyantianChronicals, aliens show up, see the earth is occupied, and start terraforming mars and venus instead.

    Looking for a Bearing part for a rotating section.

    in KSP1 Mods Discussions

    Posted

    I have an ambitious plan for a minmus mass driver, that requires a rotating bearing part.

    Scott Manley used a module that would meet my needs during his Reusable Space Program youtube series, but I do not believe he actually identified the part or the mod it is from. (

    )

    I'm looking for a part that can freely rotate on one access, and attach additional parts to that rotating section. I would be interested in comparing different types of bearings, if more than one is available.

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