Canon EOS 5D Mark II
ƒ/4.5
100 mm
1/3,200
200

“Sure, give us Pad 13” I said….

Here you see the moment of the first motor CATO. Then it all went crazy…

Here is the flight video compilation, including the HD cam on the rocket.

My son designed and simulated this rocket from scratch, and he wanted a rocket motor at each fin tip because it would look really cool – like a wide cylinder of fire coming from a skinny rocket.

It is a surprisingly robust design. It will fly straight with any one motor failure, each a rare event. On Saturday, we had two for the first time. Just after ignition, one of the single-use Aerotech G75 metal storms exploded, and simultaneously, as the on-board computer fired the igniter in the central J140 moon burner, the e-match failed to ignite the pyrogen dip as provided by CTI.

So, on this flight, we had two of three fin motors lit, and no thrust from the heavy central motor. So the rocket went into a death spiral overhead as soon as it left the launch rail. (photos below)

6 responses to “Unlucky Pad #13”

  1. and then… each shot is a quarter second apart:
    IMG_3462
    IMG_3463
    IMG_3464

    The onboard HCX computer did its job and deployed the parachutes at apogee, about 30 ft. overhead.

    The rocket airframe was unharmed from the spiral dance, and the red fin tip above with the motor that CATO’d just needed a strip of duct tape to be ready to fly again.

    So, we put in new igniters and parachute deployment charges, and properly lit the J140 that was still in the center body. So in the second flight, the fin-tip tubes are hollow (another flight mode, by design).

    The second flight on the video was a perfect long burn up and over the farmlands, recording video the whole way, and landing in an orchard of almond trees.

  2. Sweet. Amazing shots and recovery. And a nice quick turnaround for 2nd flight. Kudos to the young designer.

  3. Like Apollo 13…

    Image from rocket cam
    Screen Shot 2012-05-21 at 9.33.50 PM and a repost of the sequence: and then… each shot is a quarter second apart:
    IMG_3462
    IMG_3463
    IMG_3464

    The onboard HCX computer did its job and deployed the parachutes at apogee, about 30 ft. overhead.

    The rocket airframe was unharmed from the spiral dance, and the red fin tip above with the motor that CATO’d just needed a strip of duct tape to be ready to fly again.

    So, we put in new igniters and parachute deployment charges, and properly lit the J140 that was still in the center body. So in the second flight, the fin-tip tubes are hollow (another flight mode, by design).

    The second flight on the video was a perfect long burn up and over the farmlands, recording video the whole way, and landing in an orchard of almond trees.

  4. This looks rather dangerous. To get technical, it looks like y’all could get yo’self kilt.

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