This instructable will teach you how to construct a large, almost authentic looking knex trebuchet. This trebuchet can launch marbles about 25 feet with a good launch. I had built this about a year ago, and just took it out of the basement. Loaded it with a marble, pulled the launch pin, and to my surprise, almost broke a window. Later, i loaded it up with airsoft pellets, and launched it at my sisters door. The trebuchet stands about 2 feet, 4 inches tall. It is very simple to construct, and takes about 30 min. The movie should show you a short clip of the trebuchet launching.
I am not liable for anything stupid you may do with this trebuchet....If you injure or kill anybody with it, don't come crying to me. Just be smart
PS: this is my first instructable, so tell me if it is good, and what improvements i could make to it.
PSS: sorry about the low quality pictures, But you should still be able to get information from them.
UPDATE: i just built a duplicate at my friends house using this instructable...I think i miscounted a few pieces, but if you have your knex bucket near you, this shouldn't be a problem. Also, you may need to tinker with the string length, counterweight weight, and other small stuff...It still works fine though!
Step 1: Materials List
(all measurements may not be accurate)
Blue x 50
Yellow x 24
Orange/red x 6
Grey x 1
Yellow x 9
White x 12
Light Grey x 2
Dark Grey x 2
Red x 18
Blue x !0
Purple x 10
PS: Red can be used in place of orange, and the other way around
Some sort of tape ( I used scotch tape..the clear stuff...because i was sort of in a pinch...works fine!)
two D cell batteries
a bit of spare cloth