Epic Rocket - Ground Cam

My son's unique design with a motor on each fin tip (and honeycomb nomex fins for strength to hold them on), flight computer that lights the central long-burn motor at launch detect (it's coming up to pressure at the moment seen above), onboard HD video cam, and RF tracking beacon (which is how we recovered the rocket at its video).


Flight computer data below.

  • Steve Jurvetson 3y

    It was a windy day, so I thought the arc off the pad was weathercocking from an overstable design, but the forensic photos below show that one of the Metalstorm motors was late in coming up to pressure. Each photo is .26 seconds apart (followed by the one above):

    IMG_0004 IMG_0005

    and off into the wild blue yonder, a wide-body shower of sparks from the titanium sponge mixed in the fin motor propellant:
    The HCX flight computer logs 500 datapoints/second:
    Screen shot 2011-12-06 at 9.34.41 PM
    The rocket went horizontally under thrust, and the motors came up to thrust sequentially. It did not go a mile high as planned, but more like a mile downrange. While screaming along at about 242 MPH horizontally, the parachute popped out with a strong kevlar cord (at the vertical apogee, 11 seconds in), inducing an instant air-braking... which to quote Bill Murray: it's a little harsh.

    With the red g-force curve above, you can see a fin motor come on a bit after the others, and then the spike of the I100 kicking in at 0.5 seconds. The fin motors cut out at 1.5 seconds, leaving the smooth curve of that central long burn motor:

  • Todd Lappin 3y

    Meanwhile, rocket mania has taken hold in Bernal Heights, San Francisco:

  • Steve Jurvetson 3y


  • solerena 3y

    They are so sweet!
  • Todd Lappin 3y

    Totally punks.
  • scleroplex 3y

    bright kid :-)

    a rocket boy!
  • Piotr Burdylo 1y

    Thanks for sharing on Creative Commons. I used this on a blog post: pburdylo.wordpress.com/2014/01/03/what-i-learnt-in-2013
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Taken on December 3, 2011
  • EF70-200mm f/2.8L IS USM
  • ƒ/5.0
  • 70.0 mm
  • 1/4000
  • 400
  • Flash (off, did not fire)
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