Canon PowerShot SD700 IS
ƒ/2.8
5.8 mm
1/500

One of my favorite rockets just bit the dust. The final moment was a fiery ballistic swan dive back to Earth.

It was a wonderful hybrid of three Estes rocket kits: the Oracle for the video camera nose cone, a modified Blue Ninja (built to take E motors), and the red booster stage from a CC Express.

So, in total, I took a video camera rocket designed for a D motor, and jerry-rigged it to take a D booster that then ignites an E second stage. This lets it fly much higher, while capturing video the whole way. I’ll post some thumbnails from her prior flights below, with paths to the video.

This time, however, the main E stage burned brightly but provided no thrust. So it slowly arced over… with a torch burning out of the back. After gathering the debris, I discovered that the failure was in the detachment of the ceramic nozzle from the E motor. Details in the notes above.

With two unusual single-use motor failures recently, I suspect temperature cycling may be the common culprit. I will now store them like a fine wine.

8 responses to “Post Mortem”

  1. Prior flights of glory…

    Rocket-eye’s View To Infinity and Beyond... Coming Down Smokin' over the Stanford foothills

    This setup does not capture sound though. It’s a shame, cause that’s a big source of the excitement at any launch. For our larger rockets, Erik and I have custom-built a wireless video solution that captures the launch (and has the added benefit of capturing the video live at a ground station even if the rocket suffers some catastophic fate =). Here is a good example (short video).

  2. Bummer ! The ‘prior flight’ shots are great. Like your added explainations. Happy New Year !

  3. Good heavens…it looks just like one of Charlie Brown’s kites!

  4. Heh… great association…. Lucy was laughing on the sidelines too….

  5. Oh noes! I remember you telling me about modding that rocket, now you’ll just have to do another one! Bigger! Better! Rockety-er!

  6. Bogus man. I vote with oddwick, though. A rough sport, er, ok, hobby; The risk to favorite toys is great here…

    I’m glad you got some great shots with it though!

  7. What a shame.You have some great photos and videos.This is a good excuse to build that big,bad rocket you want.

  8. Exactly !!!!! That’s the spirit….

    Hobbies

    =)

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