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Parts and Ratios
CW
Counterweight
LA
Long Arm
SA
Short Arm
TA
Total Arm
FCW
Fixed Counterweight
HCW
Hinged Counterweight
MR
Mass Ratio
Trebuchet Types
KA
King Arthur
FAT
Floating Arm...
This is in the personal section where only the page creator/owner (and administrator) can edit pages. This means you can add a page that only you can edit. Just start the name with "personal:"...
The ratio of the length of the long arm () to the length of the short arm ()
(1)
Arm design is an issue that comes up a lot. This page has information about several popular designs and tips for building them.
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Table of Contents
Arm Mass
Torsion Arms
Arm Base
Arm...
Definition
The Arm Stall is when the arm stops moving.
Significance
Once the arm has stopped moving, it no longer has any kinetic energy. That means any kinetic energy that was in the arm has been...
The main lever arm
Torsion powered device using two arms connected by a bow string and turned by a high tension twisted bundles of rope called a skeins. Ballista can throw stones (Balls), or arrows. The arm positions...
The Burlington Pumpkin Pitch takes place in Burlington every year in late Septembers or early October.
Pages Referencing the Burlington Pumpkin...
Competitions Pages
Competition News
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Table of Contents
Definition
Significance
Background: Energy Transfers
Counterweight Energy and Velocity
The Normal Component
The Tangential Component
Changing the...
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Table of Contents
About
Current Plans
Devices
Mini KA
Onagenator 2
Onagenator 1
K'nex FAKA
Golf Ball Beast
Ballista
Tiny treb
First treb
Mini Whip
Blog
About
I'm Craig, the...
Counterweight powered trebuchet where the counterweight is directly attached to the short arm. Simplest of all trebuchet designs mechanically.
Machines
Power Source
Gravity
Advantages
Easy to...
A fixed counterweight trebuchet where the Counterweight is forced to fall straight down by a counterweight guide. The axle is allowed to roll forwards and backwards on a rail.
Machines
Power...
The FAKA is a trebuchet design invented in late 2006 by Craig Macomber. It stands for Floating Axle King Arthur. It combines the efficiency of a Floating Arm Trebuchet (FAT) with the increased...
For information about Floating Axle King Arthurs see Floating Axle King Arthur page
Machines
A Floating Axle Trebuchet where the wheeled axle is lifted above the track for the first part of the throw allowing more counterweight drop.
Machines
Power Source
Gravity or Springs
Advantages...
The axle of these trebuchets is wheeled and is allowed to roll along a rail or track.
Power Source
Usually gravity or springs.
Advantages
Straighter counterweight drop
Reduces frame...
A Floating Axle Trebuchet with no counterweight guide. The arm, counterweight and axle are free to move forwards and backwards.
Machines
Power Source
Gravity or Springs
Advantages over...
Recent Forum activity
Recent topics
Most active topics (last week)
Recent posts (+more)
The frame serves a few important purposes. Mainly is holds the axle or bundle off the ground, but it also often provides an anchor point for cocking, holds the sling trough, and effects...
This is a glossary of hurling terms used on this site who's definitions are commonly unknown or are use in a hurling specific way.
To add an entry enter the name in the box below and press "Add...
See Craig's Blog for more info
Threw 320 feet with a 5 pound CW, and 690 feet with 15. It is a floating axle King Arthur with the rail at around 3'2" off the ground. The wheels are 4 sliding door...
Gourdinator is a Floating Arm Trebuchet from Sedro Woolley that has been entered in the Burlington Pumpkin Pitch in every year. In 2007 they bent their arm but were able to fix it with help from...
The member connecting the counterweight to the end of the short arm.
Torsion powered device using two arms connected by a bow string and turned by a high tension twisted bundles of rope called a skeins. Ballista can throw stones (Balls), or arrows. The arms swing...
Counterweight powered trebuchet where the counterweight is attached to the short arm through a hanger allowed to pivot at the attachment to the short arm (hanger axle).
Machines
Power...
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See trebuchets or torsion.
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Table of Contents
What is hurling?
Why hurl?
What is a hurling device?
Where do I start?
Choosing device type
Power source
Size vs. Range
More to come soon.
What is hurling?
Hurling...
J-Buchet is a Floating Axle King Arthur (video including most of its throws on that page) from Sedro Woolley that was been entered in the Burlington Pumpkin Pitch in 2007. It is the first large...
Who can join?
Everyone can join, but you should be able to do everything but delete other peoples pages without joining; however, if you have an account your account name will be associated with...
Super propped trebuchet where the arm is locked to the hanger when cocked with the arm pointing almost straight down, and the hanger almost straight up. The hanger is released first and when it...
For information about King Arthurs see king Arthur page
Machines
Another list of links is available at The Hurl's Link Directory
Informative Sites
TheHurl
The Hurl Message Board. The place for hurling questions and discussions.
Ripcords Trebuchet stuff
Great...
The part of the arm of a trebuchet on the sling side of the main axle
The length of above
All Machines
To add a machine enter the name in the box below and press "Add Machine." For it to appear in the tree and in the site maps set its parent to the appropriate type page.
For information about (Type here)s see (Device name) page
Machines
The ratio of the mass of the counterweight () to the length of the mass of the projectile ()
(1)
Stats
Type: King Arthur
CW: 3 1/2 pounds
Axle Height: 13 1/2"
Long Arm: 12 3/4"
Short Arm: Adjustable (4 1/4")
Sling: Adjustable (13 3/4")
Wheels: Yes!
Frame: 1 1/4...
See Craig's Blog for more info
Onagenator2 was originally build to fit in a 1 foot on a side cube. Later, the arm was lengthened and it was put on a bucket. The longest throw was 620 feet with a...
Torsion powered device using an arm turned by a high tension twisted bundle of rope called a skein. Onager arms swing in a vertical plane like a trebuchet. Check out an excellent video of ChuckyII,...
Our pictures are stored in our Flickr group. The pictures are tagged with "thehurl" and all other relevant tags. This automatically embeds the pictures on the relevant pages. If you want to add...
Pumpkin On A Stick is a traction trebuchet build by Craig Macomber for the Burlington Pumpkin Pitch in 2007. It is powered by the weight of two teenagers, and threw an 8 pound pumpkin 84.4 feet. It...
Measurement of efficiency of a trebuchet where closer to zero is better. Calculated by dividing the range () by the long arm length () and then dividing the mass ratio () by it.
Source: Ripcords...
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The Relative Strength Index (RSI) measure the…
The part of the arm of a trebuchet on the counterweight side of the main axle
The length of above
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Table of Contents
Tuning
Function
Design
Adjustable Length
Pictures
Tuning
For tuning information about slings see the tuning page. For information on making adjustable length slings...
Standard Performance Evaluation Corporation
Trebuchet powered by the downward pull of springs attached to the short arm.
Machines
Power Source
Springs
Advantages
Light weight
High speed (can be faster than gravity)
Disadvantages
Springs...
Current issues:
None known!
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Introduction to Hurling
Frequently Asked Questions (FAQ)
Welcome to The Hurl Wiki
This wiki is for general information related to hurling, the fine art of sending projectiles vast distances. For...
Trebuchets
Torsion
Parts
Arms
Triggers
Slings
Winches
Statistics
Pages List
Recent Changes
Members
Forum
Forum Activity
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Contact
Torsion devices are powered by a high tension twisted rope bundle.
Torsion Specific Pages
Pages Relevant to Torsion
Click here
Great Torsion Sites
siege-engine.com - Great terminology and advice....
This page is under construction. For information not listed here try siege-engine.com's Torsion page
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Table of Contents
Terminology
How Torsion Bundles Work
Use
Onagers
Ballista
Types...
Trebuchet powered by the downward pull of the operators via ropes attached to the short arm.
Machines
Power Source
Human
Advantages
Easy to transport
No counterweight
Disadvantages
Limited...
For information about Traction Trebuchets see Traction Trebuchets page.
Machines
TreBarbaric is a Hinged Counterweight Trebuchet from Sedro Woolley that has been entered in the Burlington Pumpkin Pitch (Video here) several years. In 2007 they once again won the Competitive...
For information about trebuchets see trebuchets page.
Machines
Design
Materials
Trebuchet frames are usually made from wood, steel or both.
Pictures
A trebuchet is a device powered by a force (often gravity) acting on one end of a lever (arm) causing the other end to throw the projectile usually with a sling.
Trebuchet Specific Pages
Pages...
These types have been moved to their own pages. See the trebuchets page for a complete list.
Short description which will be summarized in the type list.
Machines
Power Source
Gravity/springs/human etc.
Advantages
ex:Easy to build.
ex:Simple to tune.
Disadvantages
ex:Low range
ex:Hard...
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Table of Contents
Load Calculation
Types of Triggers
Inline
Ballista Triggers
Mounted
Purchasing Triggers
Pictures
Load Calculation
Coming soon.
Types of Triggers
A nice collection...
This page, like many others, is incomplete. Little editing has been done, but the minimal content has been written. Tuning tips for specific devices will be added and expanded on soon. Details for...
(VLR) A trebuchet powered by a rope pulled from a remote location where the effective mass ratio is changed over time by having the counterweight pull down the middle of a span in the...
According to Wikipedia, the world largest wiki site:
A Wiki ([ˈwiː.kiː] <wee-kee> or [ˈwɪ.kiː] <wick-ey>) is a type of website that allows users to add, remove, or otherwise edit...
Counterweight attached to a rope wrapped around a wheel or pulley like part if the arm around the axle. The wheel can be well under a full circle, and can be very irregularly shaped to change the...
A hinged counterweight trebuchet there the counterweight hanger is placed on top of the arm and the arm is pointed in the forward throwing direction when cocked.
Machines
Power...
This page is under-construction.
A good page about winches is siege-egine.com's Winches Page
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Table of Contents
Load Calculation
Types of Winches
The Spool
The Crank and Power...
The World Championship Pumpkin Chuck takes place in Delaware every year in early November.
Pages Referencing the Burlington Pumpkin Pitch
Pictures
2007
Links
http://www.punkinchunkin.com/
Chuck...