Author Topic: Technologies that will shape the future of aviation and space exploration  (Read 27885 times)

Online Stormbringer

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Generally- flour particle sized or below rocky or metallic grains with a incident rate of one impact per square meter of frontal cross section per day. Possible sand grain sized and (barely possible) larger than sand grain sized at a much reduced frequency. However, in the event of even larger impactors, the shielding should be capable or reducing or eliminating penetration to the habitable portions of the ship or the vitals of an unmanned probe.

A probe or ship that must spend years or centuries at relativistic speeds will encounter thousands and thousands of particles of grit. Rather like being sand blasted or being caressed by a power grinder.

Anywhere in the local bubble within ten or 20 light years or so. (Outer Spaaaaaaaaaaaace)

The energies involved in orbital velocity collisions are several orders of magnitude higher than sandblasting or grinding. Not sure that hardness is really what you want.
i was not referring to orbital velocity collisions which are bad enough. one grain penetrated 20 cm into a structural bit of the ISS. i was talking interstellar velocities which are hugely worse. and the sand blasting analogy was merely to point out that with the days adding up even ten hits per day would add up 10 or 100s of thousands of dust mote sized impacts over the total trip time each with the tunneling power of an AP rifle round or above. if animated and sped up those impacts would resemble being sand blasted. and whether accompanied with fancy graphics or not the ship that finished the journey would be pocked with a multitude of pits gashes and tunnels.

this is counting on the statistics to prevent impacts by anything peas sized or larger.

if such high velocity trips are ever undertaken a multi-system set of protections and precautions will be needed to make the journey survivable.

Hull materials themselves plus their arrangement and relation to each other will need to be modeled designed optimized. the materials themselves will have to be engineered. more than one protective measure will be needed to compliment the technology in the hulls. things like capture by molten metal droplet radiator streams, electrical, magnetic and plasma shielding. laser target acquisition and kinetic defense. AI controlled auto evasive maneuver without killing everybody and breaking everything on board.
« Last Edit: 06/29/2017 09:21 PM by Stormbringer »
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Online Stormbringer

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When antigravity is outlawed only outlaws will have antigravity.

Offline CameronD

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https://www.nextbigfuture.com/2017/07/nasa-will-test-simple-nuclear-power-system-which-will-be-in-the-1-to-10-kilowatt-power-range.html

well that's that then. :)

That's what?  ???  Looks like JARP (Just Another Research Project) to me.. with zero application to the future of aviation and very little for space exploration anytime soon.
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Online Stormbringer

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https://www.nextbigfuture.com/2017/07/nasa-will-test-simple-nuclear-power-system-which-will-be-in-the-1-to-10-kilowatt-power-range.html

well that's that then. :)

That's what?  ???  Looks like JARP (Just Another Research Project) to me.. with zero application to the future of aviation and very little for space exploration anytime soon.
if we ever get to tool around the solar system or have permanent settlements on mars for example we will need to have matured a number of technologies or subsystems as a prelude. one route to making these things feasible is nuclear reactors. Fission is something we could ready very quickly as opposed to fusion which may or may not happen any time from 5 years from now to a century or more from now. solar becomes troublesome the farther away from the sun you go and beamed power takes infrastructure that some tout but which would take a lot of development and a lot of design and a lot of putting nuts to bolts in new construction enviroments and therefore a lot of lift and bob the builder construction dudes in space. none of that seems to be a near term thing. But space rating a fission reactor seems that it could be done like tomorrow if someone important (like a president or congress or a random rich egocentric billionaire dude or dudette)committed to it.
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Online Stormbringer

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This sort of AI development is key to unmanned probes to deeper regions of space:

https://www.space.com/37326-curisoty-rover-picks-its-own-targets.html

direct real time control of a dumb probe will not be possible even in the outer solar system let alone interstellar space of around nearby stars. probes will therefore need to be able to make decisions and implement them on their own without deciding to laser spectroscope a random space cootie which might find the procedure objectionable.
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Online guckyfan

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there's no chance a self-driving surface probe could effectively navigate Earth's frontiers, much less another Planet's.

I disagree. I have thought for a while on how new rovers could operate. Rovers with large batteries and plenty of power, but with the need to return to a charging station. Rovers could do exploration similar to how Curiosity operates. But when the charge gets low, it could self drive 20km back to the charging station quickly on a known path and then return quickly to its exploration location. Rovers with high power needs can not rely on RTG with 150W output and they can not rely on solar panels mounted on their back in the future.

Online Stormbringer

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just send a roomba :)
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Online Stormbringer

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Online john smith 19

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BTW.

Current generation of Mars rovers already do a certain amount of autonomous route planning.  AFAIK the exact path is not sent to the rover. What's sent is the final destination. The rover then integrates data from its various sensors to plan the route to that point.

While the surface of Mars is very uneven and dusty it does have the advantage that there are very few moving objects on it to avoid.

This technology has (gradually) been improving. Slightly improving processor power (to run it) radically improves the amount of science collected, given the bandwidth constraints to Mars for instructions. Also the cost of the processor is a one time cost, while the DSN bandwidth costs are ongoing.
"Solids are a branch of fireworks, not rocketry. :-) :-) ", Henry Spencer 1/28/11  Averse to bold? You must be in marketing."It's all in the sequencing" K. Mattingly.  STS-Keeping most of the stakeholders happy most of the time.

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