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Rockets & Rocketry (rocket) group

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  1. Joshua Judson Rosen (rozzin)'s status on Sunday, 24-Apr-2016 23:33:44 EDT Joshua Judson Rosen Joshua Judson Rosen
    • nanohacker
    • Rockets & Rocketry
    First big !rocket launch of the year for us, this weekend! Bought a couple new FlisKits directly from Jim Flis: a Tesla for me, a Triskelion for @nanohacker.
    Sunday, 24-Apr-2016 23:33:44 EDT from web permalink
    • Joshua Judson Rosen (rozzin)'s status on Sunday, 24-Apr-2016 23:35:50 EDT Joshua Judson Rosen Joshua Judson Rosen
      • Rockets & Rocketry
      Also got a second HERC-5 !rocket kit for me—since the first was so much fun ☺
      Sunday, 24-Apr-2016 23:35:50 EDT permalink
    • Joshua Judson Rosen (rozzin)'s status on Tuesday, 26-Apr-2016 17:33:25 EDT Joshua Judson Rosen Joshua Judson Rosen
      • Rockets & Rocketry
      "Took its time coming down" is an understatement—we got to see this !rocket *actually get stuck in the sky* on the 23rd: http://cmass.org/index.php?view=image&format=raw&type=orig&id=1928&option=com_joomgallery&Itemid=6 http://status.hackerposse.com/url/10671 #haileris
      Tuesday, 26-Apr-2016 17:33:25 EDT permalink
  2. Joshua Judson Rosen (rozzin)'s status on Sunday, 24-Apr-2016 23:50:35 EDT Joshua Judson Rosen Joshua Judson Rosen
    • Rockets & Rocketry
    I think I need to get a few items from the Odd'l !Rockets catalog: http://oddlrockets.blogspot.com/p/accessories.html
    Sunday, 24-Apr-2016 23:50:35 EDT from web permalink
    • Joshua Judson Rosen (rozzin)'s status on Sunday, 28-Feb-2016 14:27:32 EST Joshua Judson Rosen Joshua Judson Rosen
      • Rockets & Rocketry
      Interestingly, the modern Estes !rocket "starters" are spec'd as having an all-fire current of *2 Amps*, and my lithium 9V peaks at 1.2A. I'm assuming Estes figures are conservative....
      Sunday, 28-Feb-2016 14:27:32 EST from web permalink
      • Joshua Judson Rosen (rozzin)'s status on Sunday, 28-Feb-2016 14:33:45 EST Joshua Judson Rosen Joshua Judson Rosen
        • Rockets & Rocketry
        Estes "Sonic igniter" all-fire current is spec'd as *4 Amps*. Cold-weather !rocket launch seems to be its own set of interesting problems.
        Sunday, 28-Feb-2016 14:33:45 EST permalink
    • Joshua Judson Rosen (rozzin)'s status on Saturday, 27-Feb-2016 23:36:57 EST Joshua Judson Rosen Joshua Judson Rosen
      • nanohacker
      • Rockets & Rocketry
      Pretty good !rocket launch w/ @nanohacker, today; chilly outside, but no problems blasting off--hooray for lithium batteries!
      Saturday, 27-Feb-2016 23:36:57 EST from AndStatus permalink
      • Christopher M. Hobbs, lnxw48 (Linux Walt) and j like this.
      • MMN-o ✅⃠ repeated this.
      • Show all 8 replies
      • Joshua Judson Rosen (rozzin)'s status on Sunday, 28-Feb-2016 13:44:35 EST Joshua Judson Rosen Joshua Judson Rosen
        • Christopher M. Hobbs
        @cmhobbs, IIRC it was ~55°F for the Grav-Mass launch (unusually warm!), and the only successful ignitions were from the batteries that were still warm from having been in my pocket.
        Sunday, 28-Feb-2016 13:44:35 EST permalink
      • Joshua Judson Rosen (rozzin)'s status on Sunday, 28-Feb-2016 14:03:46 EST Joshua Judson Rosen Joshua Judson Rosen
        • Christopher M. Hobbs
        @cmhobbs, "smoke alarm battery", by comparison, gave reliable ignition even below 40°F: https://www.ultralifecorporation.com/ecommerce/CatalogItemDetail.aspx?CID=56&IID=628
        Sunday, 28-Feb-2016 14:03:46 EST permalink
        Christopher M. Hobbs likes this.
      • Joshua Judson Rosen (rozzin)'s status on Sunday, 28-Feb-2016 14:36:12 EST Joshua Judson Rosen Joshua Judson Rosen
        • Grav-mass
        ... so, I guess this past !gravmass ended up teaching us a little about chemistry in addition to physics ☺
        Sunday, 28-Feb-2016 14:36:12 EST permalink

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