Paul Wooster – SpaceX’s Plans for Mars – 21st Annual International Mars Society Convention

Paul Wooster – SpaceX’s Plans for Mars – 21st Annual International Mars Society Convention

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    OldGamerNoob

    I wonder if the vacuum engines would end up being the most efficient ones to be used in martian ascent and descent with such low atmospheric pressure.

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    Kirk Claybrook

    That montage of the Falcon Heavy launch gave me goosebumps. Just to correct the host, the Tesla Roadster will not be out there until it disintegrates. It will be recovered and brought back to Earth (or perhaps Mars) one day to be put on display as a sacred artefact. Long live Elon Musk!

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    john pepin

    No matter how much infrastructure you build, people will not go there unless there is some advantage to it, how will they make money? Artifacts, resources or freedom, those are the things that traditionally draw people.

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    stainlesssteelfox1

    One thing they don't talk about for In Situ Resource Utilisation, specifically manufacturing propellant, is numbers. According to this reference (https://en.wikipedia.org/wiki/Sabatier_reaction#Manufacturing_propellant_on_Mars) generating 1 ton of fuel requires 17 MWh. To fully refuel a BFR requires 1100 tons of fuel.

    Assume you're only refuelling one BFR and are using the 16 month window between Earth Mars and Mars Earth Hohmann transfers. That's 480 days or 11520 hours, or 95 kg of propellants per hour. Call it 100kg to allow for (very low) handling and storage losses, and you still need a power input of 1.7 MW, or 170 10Kw Kilopower reactors at 226 kg each (38420 kg or 38.5 tons). The LANL Megapower reactor (35 to 45 tons, 2 MWe/5MWth) would work as well. The Sabatier reactor (based on scaling up the reference design) is another 5 tons.

    That's not including the mining equipment and or rovers you need to extract the needed water. Mini Excavators range between 2 and 8 tons. You need two for redundancy plus spare parts. So between 10 and 20 tons for mining equipment, though these will also be useful in setting up the installation as cranes or tractor units.

    Using worst case estimates, the total mass is 70 tons. So it could be done, but you're pretty much going to have to dedicate a Cargo BFR pretty much to ISRU components.

    LANL Megapower reactor – https://www.nextbigfuture.com/2018/01/kilopower-megapower-reactors-would-revolutionize-energy-safety-and-space-and-military-applications.html

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    Cosmos with Dr Turi Louis

    The Mars Cult Society deadly program for young indoctrinated suicidal souls – share pls http://www.drturi.com/the-mars-cult-society/

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    Eric Challender

    Paul for God sakes man quit saying "ahh" let the damn space be there please for the sake of the information you are sharing with us.

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