Siege Engine.com: Mista Ballista : Rope Bundles
Treatises Engines Of War Engineering Battles Spare Parts Plunder
Mista Ballista : Rope Bundles
Search

The rope bundles are the main engine of the machine. The framework that holds everything together is about 24 ft long, and 6 feet tall.

The Scutula (Hole carriers) await their fate on a pile of rocks. The round donut was found in this shape at a scrap yard and is 1 inch thick. The green rectangular donut was torched out of some sort of factory floor support, and is 3/4 inch thick. (Also from a scrap yard.) These will become the major hole carriers for one torsion bundle. A matching set will be used for the second bundle.


Oops, we cut the holes in two of our hole carriers a bit large last year. Here Eric is adding a couple lbs of steel back onto the inside edge of the scutula prior to the milling operations.


Unfortunately the 1" thick scutula pieces that we had scavenged from the scrapyard turned out to be cast iron. This prevented us from welding up our rope bundles properly. Rather than replace them (with all the necessary machining tasks to the new pieces) we decided to bolt on some steel adapter plates (auriculae) that can be welded to the stanchions. Here we are drilling and tapping holes in the adapters plates to fasten them to the cast iron scutula.


Fitting adapters between the regulae and the bottom scutulas of the rope bundles. Here you can see the new adapter plates temporarily bolted in place.


We've finally started welding together the rope bundles. Here Eric welds a stanchion onto one of the 3/4" thick steel scutulas. Getting them to be perpendicular was a bit of a challenge, as the next step required a perfect fitting on a 6 inch by 10 inch area at the end of 6 feet.


Once the stanchions were welded to the steel scutula, we lifted that unit in the air with Dave's engine crane. We had to get the stanchions to fit perfectly onto the auriculae we built and bolted onto the cast iron scutula.


Since it was impossible (with the tools we had on hand) to line up the stanchions perfectly, we had to use a little persuasion to make them line up as we deemed proper. Here Kevin measures as he and Dave contemplate where the welds will go. You can see the car jack spreading the two stanchions apart to better line up with the adapters on our cast iron scutulas.


Huzzah! The rope bundles are complete! Dave and Kevin show off how they can disguise themselves as a rope bundle. Our rope bundle will eventually be about 11 inches in diameter, and almost 7 feet long.


Our rope arrived today! (10-25-2002). This is 1200 ft of 3/4" polypropylene wrapped in the original shipping packaging.


The Thursday night before the chunk we started winding the rope bundles. Here you can see that we used our pin holes to bolt the modiolii onto the machine while we started winding. In addition, you can see the small bits of chain welded to the end which we later used as hitching points while winding the rope bundles.


Here Kevin is keeping tension on the existing winds of rope while Jeff sorts out a tangle. The lines we wound in each rope bundle are 600ft long of 3/4 inch thick polypropylene.


Buy a Siege Engine
Machine
Buy The Plans
Treb Plans
 
 
Home
 
Treatises
About
Philosophy
Members
Logs
In The News
FAQ
Sponsors
Web Site
Contact Us
Copyright
 
Engines Of War
Micro Treb
Baby Trebuchet
Treb Jr
Juggernaut
Juggernaut 2
Pumpkin Putter
Baby Ballista
Ballista Jr
Mista Ballista
Baby Hatra Ballista
Hatra Jr
Baby Onager
Onager Jr
UTM
Baby ASOK
Cardan Treb
Scissor Treb
Kid-A-Pult
Vacuum Bazooka
 
Engineering
Frames
Slings
Triggers
Torsion
Winches
Centripetal
Advice
 
Battles
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
Art
Seuss Trebuchet
Seuss Onager
Night Before Chunk
Pillsbury Cartoons
Cartoons
Dave Gets Married
Roger Gets Married
Geek Calculator
Browser Hurling
Search
 
Plunder
Catapult Kits
Catapult Plans
Books
 
Contact: Team Tormentum
Copyright © 2000-2010 Eric M. Ludlam All rights reserved.
Twas' brillig, and the slithy toves did gyre and gimble in the wabe...
Last Modified: 08/19/10