treb logo treb logo


We Went to Delaware...

Long time, no update. We did in fact pack up Medieval Postal Service and head down to compete at the 2008 World Championships of Punkin' Chunkin'. We did not get the chance to launch any 8+ pound projectiles before heading down, and so had to wing it for the competition. Despite a few design flaws that reared their head (some of which we already knew about), we managed to place 7th, shooting a solid 686.79 feet on the second day of competition. Oh, and what type of trebuchet was this mystery machine? The most efficient style developed to date, a Floating Arm King Arthur. Our longest shot was with only 400 pounds of counterweight, and we designed for 600 pounds. Once we get the design flaws worked out this winter and spring, we are going to try to break 1200 feet next year. Originally we were trying for 1000, but based on what we have seen from this machine so far, 1200 is also very possible, and perhaps even more.

Trying to get MPS Finished...

So much for more consistency in the updates. It has been an aggravating last several weeks. The weekend of October 4th, originally slated for getting our first shots off with Medieval Postal Service, did not go as planned. We did get the frame set-up finished, and it looks terrific. Finishing that took up most of Saturday. Sunday did not go as smoothly. The main axle hole in the arm was barely large enough, but slightly misaligned to the bearing holes, and so while we were able to get it together with the axle, the axle was totally incapable of rotating. Track mounting went slow, though we did eventually get them up. Jason also had to make a trip to Buffalo Friday the 3rd to fix some other holes that we had found to be too small (and a couple just weren't drilled, they got missed somehow the week before). Things took time, and the next thing we knew, it was time to pack up for the weekend and tarp M.P.S.

Setting up Medieval Postal Service

The Medieval Postal Service has begun to be set up. Last Friday evening we all went out to Buffalo, and began work Saturday morning on the metal components to the trebuchet. The steel tracks were cut, drilled, slotted, and welded into the finished assemblies. Cutting for the hanger arm components was also begun. That afternoon, we loaded up the tracks and returned to Rochester to load the frame components along with tools and hardware. The following morning we set out for a camp roughly one hour South of Rochester and began setup.

Building the new Machine

Long time, no news. Well, construction is well underway on our new trebuchet for the World Championships this fall. Our application has been accepted, so we will in fact have a spot this year and fully intend to be there competing. Details of exactly what we are doing are being withheld until October 31, when the competition begins. We are not intending to enter just to enter, we intend to be very competitive among all those not aiming for 2000 feet (currently Yankee Siege, Pumpkin Hammer, and Merlin, perhaps some unknown will show up as well to make it interesting).

Floatbox Updated, New Treb News

Updated Floatbox again, up to version 2.44. There are some issues with the display of the image galleries with Firefox 3 apparently, those will hopefully be resolved with the next version.

Jeckyl Hyde Video

The log from last Sunday's launch with Jeckyl and Hyde is now available, along with a brief video of all the shots we took that day. The bottom line is that while we have fixed the issues with the secondary trigger, we have not fixed some other design flaws, pertaining to the fact that the in riggers are too close to the hanger arms, and a couple of other issues. For these reasons, we are not going to release the Jeckyl and Hyde plans, despite the fact that they are 90% finished for public usage. The machine has just too many issues to make it safe enough for others to be using, even if just using the frame to support a standard trebuchet. Sorry to all those who were waiting for those plans the last couple months, perhaps someday when we build a new King Arthur those will be released, as we now have a good handle on what needs to be done for a good King Arthur.

Plans Underway

We've started to work some more on the plans over break at the beginning of the month, but other more pressing projects got in the way, and they still aren't finished. And classes have now started, and time is even more limited. We are still trying to get them out, but it will be a bit yet. Contact us if you really need them, we'll see what we can do to help you out on short notice. The plans for our Punkin Chunkin treb have naturally taken priority. They were almost done, then a redesign was done, and we are starting over on them.

2008 Punkin' Chunkin' Preview

Matt went down to Delaware for the World Championships of Punkin Chunkin this year. Our future plans for entering in this big event have been accelerated. utilized. Plans are now being worked on for the machine we will enter. We have no realistic shot at winning probably even third place, due to limited resources, space, and transportation considerations (unless someone wants to help us out there :D). To win next year in the trebuchet division will need a 2000-plus foot shot, as in all likelihood anywhere from 1-3 trebuchets will break this mark. The top contenders at the moment are:

Jeckyl and Hyde Plans on the Horizon

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.

Jeckyl and Hyde 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.

©2019 Matt DiFrancesco and/or Team Urban Siege unless otherwise specified. No reproduction of any content within this site for other than personal use (i.e. you will NOT reproduce anything here for monetary gain) is permitted without written permission from the team captain.

All material found within this site is to be used solely at the risk of the user. We will in no way be responsible for any incidents resulting from the use of said material. Please read our disclaimer before using any information found within this site.

Site optimized for viewing at resolutions of 1024x768 or greater on current versions of Internet Explorer, Firefox, and Chrome. Please report any viewing issues or broken links to or use the contact form.

Valid CSS! Valid XHTML 1.0 Transitional


All information found with this site or at other sites linked to from here is used at the sole risk of the user. Team Urban Siege and its members will be in no way responsible for any damage or injuries suffered from the use of this information.

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!!!