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Jeckyl and Hyde Plans on the Horizon


Posted by Matt | Tags: news, site updates

There has been interest in the free trebuchet plans that have been promised, and no, they are not here yet. However, the plans for Jeckyl and Hyde, previously stated to be only partially released due to the number of problems we have had with the machine, are actually being redone so that they can be posted here in full. This is in light of what we have discovered as to why the trebuchet is not firing reliably as a King Arthur. Basically, it is due to how we have put the secondary cable guides onto the short arm. A simple fix, really, and the frame itself has been working tremendously well since the frame extensions were added this spring. So, keep tuned for the plans, they should be available soon. They will not be step-by-step ones, however, although they will be fairly straight-forward to follow.

Read more | Oct 04, 2007


Jeckyl and Hyde Launches


Posted by Matt | Tags: news, launches

More than two months after the fact, we have now finally posted updates on Jeckyl and Hyde's antics this summer. The bottom line is that of the four times we have taken it out to shoot (counting the first test shot in February), we have broken something every time, and something different every time. There are actually 2 launch logs now available along with video of both and pictures from the second, since we did launches on June 22 and July 13. Some work is left to be done, but we think we may have figured out all of the problems and can now work on getting some real data. Unfortunately, with Matt now out of town until Thanksgiving, we may be unable to do any launching until spring.

Read more | Sep 21, 2007




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Use "common sense" when operating trebuchets and catapults. Even little ones can be dangerous. Do not place anything you are not willing to lose in the plane of the arm rotation (this includes yourself, body parts, car windshields, cameras, etc). These catapults and trebuchets are capable of throwing just as far backwards as forwards, and the use of a backstop of some sort is recommended, though the use of one does not make the region behind it safe.

Also, just because the throw got away safely downrange does not mean the end of the danger. The arm is likely still swinging wildly along with the counterweight, and there is a sling whipping around. One thing many people fail to take into account is this sling; some people put a metal ring on the slip end of the sling and this ring can HURT when whipping around!

Have fun hurling, but please KEEP IT SAFE!!!