Building a Trebuchet - Seeking Advice on Slings

[hisdudeness300]

hey all,
im building a trebuchet and i wanted a litte advice on slings. my trebuchet is about 7 feet tall with a 12 foot arm; i wanted to know if anyone had experience in trebuchets and if they could help me with the sling, or direct me to somewhere with that info. thanks

http://i25.photobucket.com/albums/c67/hisdudeness300/pic1.jpg

 

[GiTS]

what exactly do you want to know?
-nocarkid88 :)

 

[daniel_i_l]

usually the length of the sling is about the same length as the arm. do you know how to set up a trigger?

 

[InvenaCraig]

Sling Length

Did you ever get your sling length figured out?

 

[Son of Ole]

A program to help you out

Nice start you got there. Having been involved in two trebuchet projects (my brother did the work, I just advised on the physics parts), I noticed three things are important.

1) The sling release mechanism: A ring that slides off a bent nail is easy and works well. The angle of the bent nail matters.

2) Structural integrity: From your picture, if that's only a 2x4 on the arm... how much weight are you planning on putting in the box? Also, what is that pivot beam made of?

3) Weight and length ratios: Check out the website below for optimal parameters.


This website, http://www.algobeautytreb.com/" , is by far the best site I've found. It even includes a computer program to model your trebuchet and help you figure out the optimal sling length. Very helpful.