Siege World Championship Chunk 2007: Hatra Ballista

Treatises Engines Of War Engineering Battles Spare Parts Plunder
World Championship Chunk 2007: Hatra Ballista
Share this page

Hatra Ballista Jr took its first trip to Delaware for the '07 chunk to compete in the Youth 10 and Under division. It came down on the roof of Grandpa's van, and didn't hit the field till 7:45 am on Friday.

We assembled and wound up the machine in 15 minutes, then discovered we had been given an extra hour to get ready. We started adding a little more torque, and broke our oak torsion bar. Very sad. We used the remaining stub and a loop of rope borrowed from Onager Jr to even up the bundles.


The little ballista sets up so fast, I forgot to take pictures. Here's Trevor standing with his Catapult in the Youth 10 and Under division.

Trevor and I wait for John the surveyor to get out of the way so we can start cranking back. Ballista of all sorts have arms that swing outward, making it dangerous to stand over there!

Eric was coaching Trevor through pullback. Here you can see the arms are mostly pulled back, and the pumpkin has come a ways down the runway. The whitish board sticking straight up behind the green chair is "Horn on a Stick". It holds the battery, an antique car horn, and a doorbell button.

The arms are pulled all the way back, and Trevor has hooked up the lanyard to the tiny Seacatch. (The white line he's holding.) Trevor then honked the horn, and yells out Torsion Rules! the pumpkin sproings away.

We didn't get to test fire or relax the bundles at all first due to the short setup time, and our shot with a 2lb 10oz pumpkin went 168 ft.

Then at 4 PM during the free fire, we tightened things up a little, then shot some more punkins, but they didn't go much farther (guess). However we did max out the 1700lb (rolling weight) winch. We picked up a pulley and stuff to try and even things out for tomorrows shot. As it was cold and windy, we didn't spend much time playing before heading out.

In this picture, you can get a good view of the horn on "Horn on a Stick".

Google Video Service
Hatra Ballista 1st Shot 2007

first shot of the 10 and under catapult Hatra Ballista, at the 2007 Punkin Chunk
45 sec - Nov 6, 2007


Hatra Ballista stands ready at 8:10 in the bloomin' morning, ready to be pulled back and shot.

A closeup of the revised pullback mechanism with competition punkin, pulley, and small Seacatch.

Trevor prepares to fire! With rain we launched into the wind for a shot around 115 ft.

Google Video Service
Hatra Ballista 2nd Shot 2007 (highspeed)

slow motion shot of Hatra Ballista\'s second shot at the 2007 Punkin Chunk
11 sec - Nov 6, 2007

Later during free fire, I finally had time to put in a smaller pouch. The new pouch is a bit smaller than the old one, and was knitted by Amy after I had done some testing, and noticed that the smaller pouch would help. This was the first chance I had to put it on.

The new pouch worked much better during our test shots. I also put in another 45 degrees of twist. Nothing broke, and things seem to be working better. In this picture, the machine is pulled back, but the loop we used to hold the cable down when we added the pulley was too long. So the arms couldn't be pulled in all the way.

Google Video Service
2007 Punkin Chunk Nov 3rd - Hatra Ballista shoots a punkin during testing

At the 2007 Punkin Chunk (Nov 3rd) - Hatra Ballista Jr shoots a pumpkin during testing. Test fired with more torsion than earlier in the day, and with a new spouch in the bowstring. Owen operates the horn. Stuart fires.
9 sec - Nov 5, 2007

Owen liked shooting the Hatra Ballista today a lot, and drew a picture of it on his placemat during dinner that night. The orange on the bottom of the picture is a pair of hands pulling the trigger.


Trevor and Grandpa stand with their machine just before their final competition shot. Everyone was excited because the machine seemed to be performing better, and the wind was low, and there was no rain!

Our work yesterday on a new pouch and more torque paid off with a throw of 330 feet. Trevor was so happy. He found his standing at second place in the morning (8:20 AM) and had to wait all day till 6 PM to get his trophy. He kept reminding us of this too.

Hatra Ballista was then packed up and left the field.

At 6 PM, Trevor finally got to go up and get his trophy. He was very excited, and did a great job yelling "Torsion Rules!" when he was offered the microphone.

And thus, the 2nd place trophy was Trevor's!

Additional Pages for Punkin Chunk 2007
World Championship Chunk 2007 Team Tormentum brought two of our torsion machines to the chunk this year.
World Championship Chunk 2007: Mista Ballista Mista Ballista returned to Delaware for the 2007 Punkin Chunk. We didn't get everything done that we wanted, but we had high-hopes to improve over last year.
World Championship Chunk 2007: Torsion Class Once again, the torsion class ruled the field with massively long distance shots and the usually great Torsion comraderie.
World Championship Chunk 2007: Hatra Ballista Hatra Ballista Jr took its first trip to Delaware for the '07 chunk to compete in the _Youth 10 and Under_ division. It came down on the roof of Grandpa's van, and didn't hit the field till 7:45 am on Friday.
World Championship Chunk 2007: 10 and under The 10 and under catapult category had three machines in it this year, and everyone I talked to was plenty friendly. The families had a tendency to disappear after their shots, so I didn't get to chat with them much.
World Championship Chunk 2007: Various Various notes from other divisions, and events of interest.

Buy a Ballista
Punkin Chunk 2007
Mr. B
10 yr
In The News
Contact Us
Engines Of War
Micro Treb
Baby Trebuchet
Treb Jr
Juggernaut 2
Pumpkin Putter
Baby Ballista
Ballista Jr
Mista Ballista
Baby Hatra Ballista
Hatra Jr
Baby Onager
Onager Jr
Cardan Treb
Scissor Treb
Vacuum Bazooka
Air Cannon Jr
Extreme Chunk 2017
Extreme Chunk 2016
Extreme Chunk 2015
Punkin Chunk 2013
Higgins Siege The Day 2013
Punkin Chunk 2012
Punkin Chunk 2011
Punkin Chunk 2010
MathWorks 2010
Punkin Chunk 2009
Zukapult 2009
History Chunk 2009
Punkin Chunk 2008
Zukapult 2008
Punkin Chunk 2007
Flying Chunk 2007
Punkin Chunk 2006
Zukapult 2006
History Chunk 2006
Punkin Chunk 2005
Zukapult 2005
Punkin Chunk 2004
Punkin Chunk 2003
Bennington HS 2002
Punkin Chunk 2002
Mohonk 2002
Mt. Snow 2002
Bennington HS 2001
Punkin Chunk 2001
Busti Hurl 2001
History Chunk 2001
Punkin Chunk 2000
Punkin Chunk 1999
Punkin Chunk 1998
Spare Parts
Random Picture
All Videos
Seuss Trebuchet
Seuss Onager
Night Before Chunk
Pillsbury Cartoons
Dave Gets Married
Roger Gets Married
Geek Calculator
Browser Hurling
Catapult Kits
Catapult Plans
Contact: Team Tormentum
Copyright © 2000-2018 Eric M. Ludlam All rights reserved.
Twas' brillig, and the slithy toves did gyre and gimble in the wabe...
Last Modified: 05/10/09