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Supersized Mars Rover - Page 2 — Parallax Forums

Supersized Mars Rover

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Comments

  • ercoerco Posts: 20,259
    edited 2012-08-04 11:15
    Now THAT'S a speed at which a PING could stop a robot! Let's see, now what's the speed of sound in the martian atmosphere? :)
  • rod1963rod1963 Posts: 752
    edited 2012-08-04 13:20
    NASA better hopes it works. Cause Congress isn't in the mood to pay for their screwups anymore. They are just too high profile.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2012-08-04 13:40
    I think "screw-ups", as a blanket characterization of failure, is unfair. Failure comes with the territory in something so cutting-edge as space exploration. Granted, there have been some true screw-ups, such as confusing metric with English units in a Mars lander, causing it to crash, and using the wrong focal length for the original Hubble telescope. But even those are offset by spectacular successes, e.g. Mars landers and Hubble telescope.

    The success rate, to date, for landings on Mars is less than 40%. Given the technical challenges involved, even 10% would be remarkable. I suspect that our government enthusiastically funds medical research with even lower success rates. It's just that the failures are less visible to the public.

    -Phil
  • W9GFOW9GFO Posts: 4,010
    edited 2012-08-04 13:43
    This is what happens when short sighted politicians don't fund science.

    ttp://www.damninteresting.com/americas-discarded-superconducting-supercollider/

    The large Hadron collider is small compared to what could have been.
  • ercoerco Posts: 20,259
    edited 2012-08-04 14:07
    Opportunity is still operational long after its target lifespan. That 1000% percent success rate should be factored into the overall program's success rate. Witness Opportunity's Martian Marathon (22 miles and counting):
  • jazzedjazzed Posts: 11,803
    edited 2012-08-04 23:30
    MMRTG power solution for Curiosity Mars Science Lab Rover and other missions.
    http://www.ne.doe.gov/pdffiles/MMRTG_Jan2008.pdf

    MMRTG uses thermocouples to make voltage.
    See http://en.wikipedia.org/wiki/Thomas_Johann_Seebeck

    A more efficient Stirling alternative is being developed.
    http://en.wikipedia.org/wiki/Advanced_Stirling_Radioisotope_Generator

    These both need a heat source. Pu-238 is preferred in space. Nuclear? Yes.
  • MoskogMoskog Posts: 554
    edited 2012-08-05 01:37
    W9GFO wrote: »
    You're a day off erco. It is supposed to land at 10:30pm Sunday on the west coast.

    We europeans need to be patient and wait for the next day, as the landing will take place on monday 8:31 am.
  • PublisonPublison Posts: 12,366
    edited 2012-08-05 14:38
    Alarm set..

    Basic Stamp Homework Board, ( mounted on plywood).
    RTC alarm set for 12:00 AM EST.
    12:00 AM Relay, (mounted on plywood) sets off piezo alarm to wake up cat.
    Cat jumps up and sets off PIR to trigger second relay, (mounted on plywood), to shut Homework Board down.

    12:01 AM EST
    Normal alarm clock goes off to alert me to direct my computer to:

    NASA.gov/mars

    (If I gotta' get up, then the cat has to get up too) :) No shrimz, she had lobzter last night.
  • Duane DegnDuane Degn Posts: 10,588
    edited 2012-08-05 15:23
    jazzed wrote: »
    MMRTG power solution for Curiosity Mars Science Lab Rover and other missions.
    http://www.ne.doe.gov/pdffiles/MMRTG_Jan2008.pdf

    MMRTG uses thermocouples to make voltage.
    See http://en.wikipedia.org/wiki/Thomas_Johann_Seebeck

    A more efficient Stirling alternative is being developed.
    http://en.wikipedia.org/wiki/Advanced_Stirling_Radioisotope_Generator

    These both need a heat source. Pu-238 is preferred in space. Nuclear? Yes.

    Apparently Curiosity's power supply was built not very far from where I live. Idaho National Laboratory which built the power supply is about 50 miles from Chubbuck. I have a friend who works there. Kind of cool.
  • ercoerco Posts: 20,259
    edited 2012-08-05 20:24
    Live JPL feed at http://www.nasa.gov/multimedia/nasatv/index.html
    More Mars info at http://www.nasa.gov/mission_pages/mars/main/index.html

    Tune in tonight, just 2 hours to go!
  • ercoerco Posts: 20,259
    edited 2012-08-05 22:22
    Anybody else watching? I have the Olympics on TV and the NASA stream on the computer. I know there's a beer bottle entry coming up on one and an atmospheric entry on the other, but I can't tell which right now.
  • ercoerco Posts: 20,259
    edited 2012-08-05 22:33
    Touchdown!
  • TubularTubular Posts: 4,706
    edited 2012-08-05 22:36
    64 x 64 thumbnail as the first pic.... the Prop could display that!

    edit: Next one 256x256... we'd have to limit to 16 greyscales...
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2012-08-05 22:42
    Wow! Just wow! They pulled it off! That's gotta be the happiest roomful of engineers since Apollo 11!

    -Phil
  • WhitWhit Posts: 4,191
    edited 2012-08-05 22:46
    Amazing! Now the real fun begins...
  • TubularTubular Posts: 4,706
    edited 2012-08-05 22:48
    Wow that is a stunning result. I didn't really expect that landing to work, seemed a bit too ambitious. Now that they've pulled it off eveyone will be wanting a "skycrane".

    Ken, hit the go button on the Skycrane accessory for the elev-8. Everyone will want one...
  • Dr_AculaDr_Acula Posts: 5,484
    edited 2012-08-05 22:51
    Thanks for the links erco - that was great to watch. By coincidence (I guess it has to happen somewhere on the planet) touchdown time on Mars of 3pm was exactly the same time as here in Australia.

    It is fun zooming around that crater on Google Mars - some big mountains to avoid.
  • lardomlardom Posts: 1,659
    edited 2012-08-05 22:53
    I know I wasn't the only one watching the celebration like this...:D Truly amazing. I hope they arranged for designated drivers!
  • potatoheadpotatohead Posts: 10,261
    edited 2012-08-05 23:01
    Excellent!

    I was very concerned about this one due to complexity. So amazing that they appear to have just nailed it! Loved watching some of the people there just excited as all get out!
  • ercoerco Posts: 20,259
    edited 2012-08-05 23:02
    Heaven help us... Curiosity is already Tweeting from Mars. :)
    http://www.nasa.gov/externalflash/mars/curiosity_news3.html

    I'll have to fake some Tweets & grainy photos from the Hot Wheels rover soon.

    7 Tweets of Terror! :)
  • lardomlardom Posts: 1,659
    edited 2012-08-06 06:34
    The engineers are rock stars. 'Opportunity' has been active since 2004.
    I woke up wanting to hear the news stories and I heard an anchor remark; "They had a nerd party". Wow...I'm a nerd. I guess I should have known! 'Reality' shows just don't do it for me.
  • skylightskylight Posts: 1,915
    edited 2012-08-06 07:16
    I wonder how far away the crane landed and if we will get to see it when curiousity starts to move around?
  • ercoerco Posts: 20,259
    edited 2012-08-06 08:41
    skylight wrote: »
    I wonder how far away the crane landed and if we will get to see it when curiousity starts to move around?

    Also one of my thoughts. Would be interesting to see that, the discarded heat shield and parachute. We're littering Mars by remote control!
  • mindrobotsmindrobots Posts: 6,506
    edited 2012-08-06 08:48
    ...and to think 200 years ago, we couldn't litter faster than a fast horse or a fast sailing ship!!:smile:

    Being a kid of the space race generation, every one of these achievements are still inspiring to me. When you think of how much had to be put together and work for this to happen as well as it did! Truly amazing stuff!!
  • lardomlardom Posts: 1,659
    edited 2012-08-06 09:08
    I just had a wild thought. Since it's already the size of a Mini Cooper including a small mirror wouldn't add much to the payload. The robot arm could place it on the ground and move back to admire itself!
  • ercoerco Posts: 20,259
    edited 2012-08-06 09:15
    Nice Mars landing animation I had not seen previously. http://mars.jpl.nasa.gov/msl/multimedia/interactives/edlcuriosity/index-2.html

    Reminds me of all the lunar lander simulators... http://eaglelander3d.com/
  • W9GFOW9GFO Posts: 4,010
    edited 2012-08-06 09:39
    skylight wrote: »
    I wonder how far away the crane landed and if we will get to see it when curiousity starts to move around?

    I recall one of the blue shirts commenting on imaging the "crane" to locate the position. My interpretation is that they meant imaging with one of the orbiters.

    There must be some value in visiting it due to the amount of material the crash probably dug up.
  • ercoerco Posts: 20,259
    edited 2012-08-06 09:46
    The original Skycrane, by Sikorsky. Another amazing achievement.

    http://www.youtube.com/watch?v=xbK4VYwD_qU
  • Ron CzapalaRon Czapala Posts: 2,418
    edited 2012-08-06 10:22
    Didn't realize this
    The Curiosity rover is carrying a nuclear power source to charge its batteries and fuel its onboard systems throughout its planned two-year mission on Mars. The system uses heat from the decay of plutonium-238 to generate 110 watts of electrical power to charge the rover's batteries.
  • skylightskylight Posts: 1,915
    edited 2012-08-06 10:31
    I had a feeling that it would be nuclear powered due to it's size and motor draw a solar array would have to be pretty big or charging time too long to be practical
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