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|10-24-2012, 02:22 PM||#1 (permalink)|
Building a trebuchet
Have any of you folks built a trebuchet?
I am building one for a competition and I'd like to see what other folks have learned from positive and negative experiences to make their machine run optimally. Whether it be dimensions, materials, structure, or other factors that input into the physics of the trebuchet.
I already have some kind of plans drawn up, but I don't have hands on experience of using one to actually know what has to be what, what the weight should be, how to make the hinge strong, yadda yadda.
I'll be launching 5-10 pound pumpkins and don't have the materials to make a giant war machine. I've looked online, but it's mainly just videos of a bunch of rednecks chucking pumpkins (I guess that's going to be me, right
I'm looking for something around this size, maybe a tad smaller.
Any help is appreciated!
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Last edited by Bigtuana; 10-24-2012 at 02:26 PM.
|10-24-2012, 03:45 PM||#2 (permalink)|
MCBs armed pacifist
Join Date: Jun 2009
Location: West Michigan
Lets talk about this. I think a paintball trebuchet could be done. Load it up with a pod or two of paint (not the pod) and release it. IT woud not have to be very big and could be aimed towards the center of the field.
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|10-24-2012, 03:49 PM||#3 (permalink)|
Join Date: Apr 2012
Location: Bucks county, PA
built a couple 4ft trebs and one 12ft which was a very good design. I can try contacting the person with the plans for the 12ft one. It was strange and worked well.
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|10-24-2012, 06:37 PM||#8 (permalink)|
Join Date: Dec 2011
Location: new york
Oh I built one last year, it was small and launched cherry bombs, it twas awesome!
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|10-24-2012, 06:43 PM||#9 (permalink)|
brassmage and necrotech
Join Date: Jan 2007
Location: cape may, new jersey
i built one years ago, took a while to get the 'timing' just right, it's a balance between arm length, weight, rope length, and release hook angle. easier to time a cocker. here's an old vid of it with 'late timing', releases late, shooting the 5 pound weight into the ground:
trebuchet Video by ian - Myspace Video
edit: and some heavy math:
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|10-24-2012, 06:44 PM||#10 (permalink)|
Brass Monkey Customs
The Algorithmic Beauty of the Trebuchet
Trebuchets, both big and small
There are loads more... My experience has been to get the ratio on the arm correct for the best firing characteristics. I use 11 foot thorwing arm to 1 foot counterweight arm, with a sling of 4 feet. YMWV
Brass Monkey Customs
Brass Freak compatible and Equation inserts in .665, .670, .675, .678, .680 and .685
Current Freak compatible inserts in stock:
.665 = 0, .670 = 16, .675 = 3, .678 = 4, .680 = 4, .682 = 4, .685 = 11
Still selling brass tubing, with .678 barrel stock now available!
My feedback: MCB - eBay - AO