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DavidM
Joined: 07 Jul 2004
Posts: 41
Location: Victoria, Australia, Earth, Milky Way Galaxy
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About 10 years ago a friend an I put together what we called the 'rocket sled', very similiar to a street luge except you are in a 'sort' of a prone position. It used skateboard wheels, which was a mistake as the control was not the best (I can understand why the luge wheel are so wide). It was about 1.5 metres in length, had two small panels (suitably old fashioned eg: big switches and chunky dials, mechanical counter) they measured battery voltages and activation/arming switches, timer and engine cutoff monitors and engine section temperature. The rocket engine was a cluster of D-types (thank goodness the NAR are not in Australia, I'd be banned for life), I can't remember the exact number (maybe ~24) but almost $200 worth (and I couldn't get the same type so they were mixed, some single stagers, glider engine etc..). The 'sled' was attached via a disconnectable umbilical at the back end to an external controller/car battery which ignited the engines en masse (mostly) from a trigger on the sled.
Originally the 'sled' was powered by chambers of boiling water with dry ice added to make a big version of a squirt rocket, these ones were only enough to push the 'sled' unmanned. Later several 'unmanned' trips were piloted by a couple of heavy variacs using only a few D motors in the cluster. Then eventually a manned launch (slow, ~2 secs burn, altogether 25 secs go to whoa), and a serious one. The serious one never happened - which is possibly not a bad thing, the sled really needed some work for speed. The slow one was still fun anyway, its worth doing, everybody will think you are nuts, it even got a mention in my wedding speeches. Still have the ol' sled in the shed and often think about having another go at it (especially before they ban rocket motors in the current political climate). _________________ "Limitation shows the Master."
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Wed Sep 22, 2004 1:37 am |
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DavidM
Joined: 07 Jul 2004
Posts: 41
Location: Victoria, Australia, Earth, Milky Way Galaxy
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I pulled out the rocket sled for a photo, I found the panels, remote controller, but no wiring, no used rocket cluster, no car battery, but you will get the idea. I wore a black US flight suit and my carbon fibre sky diving at the time, my sky diving helmet is photographed for scale.
http://robowars.org/forum/album_pic.php?pic_id=262
_________________ "Limitation shows the Master."
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Sun Sep 26, 2004 8:04 pm |
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