Re: pic: "You should never go against a robotics kid"
 

I've never heard of that show before and I just watch a bit of it at discovery.com. It's really cool. We'll see if we can get this on, and see how inefficient our release angle is!

Re: pic: "You should never go against a robotics kid"
 

Awesome. That definitely puts my Vex ping-pong ball launcher (but actually robot altitudinal booster :ahh: ) to shame. I wish we did stuff like that in my physics class. I third the recommendation to get it on Time Warp, that's exactly the kind of thing they'd do. And you know you've done a good job on something when you're the reason administrators try to ban it.

Re: pic: "You should never go against a robotics kid"
 

Haha, yeah. I head the teacher talking today, and he said that he wasn't worried about safety with this particular catapult or the safety practices of the group, but in the future, who knows what dangerous contraptions less experienced groups would make, without proper safety training?

Re: pic: "You should never go against a robotics kid"
 

Any chance you would release the SolidWorks File

Re: pic: "You should never go against a robotics kid"
 

My Gift to u

yes i am trying to make it

Re: pic: "You should never go against a robotics kid"
 

Nice work on the CAD so far.

Just FYI, the vertical posts that are in the actual picture but not in the CAD is a safety feature added later in the design process. After the arm is pulled back, a bar goes through the two holes in the two upright bars. This is so that so while someone is hooking up the quick release, if the people holding the arm back accidentally let go, it won't do a full swing.

Re: pic: "You should never go against a robotics kid"
 

I have an outdated .stp file. I'll talk to Bannanakin, who has the most recent one.

Re: pic: "You should never go against a robotics kid"
 

Ours where a little bigger...

Great cad, you guys got skills. 500lbs!

Re: pic: "You should never go against a robotics kid"
 

If anyone wants the cad, they can private message me their email, or IM me on aim, and i'll send the cad. I can send any format that solidworks 07 will create. I know it makes .step, .sldasm (of course), and .x_t. Those are the most common formats that I use.

Re: pic: "You should never go against a robotics kid"
 

I did it this is really cool.. the animation of it swinging is spectacular :ahh:

Re: pic: "You should never go against a robotics kid"
 

In my physics class last year we did a similar project, but instead of baseballs we used water balloon. Its almost completely safe in terms of injury from the projectile. I was the only robotics student in the class and my group's sling shot ended up setting the all time school record and put the water balloon around 135 m out.

Re: pic: "You should never go against a robotics kid"
 

Gesundheit!

That name has a certain cachet to it...:P

Re: pic: "You should never go against a robotics kid"
 

I would have to disagree with you on the safety of a water balloon. A friend of mine took a hand thrown water balloon to the eye and, if I remember correctly, ended up with internal bleeding. It was not pretty.

Re: pic: "You should never go against a robotics kid"
 

sorry, idk if anyone actually already said that, but i think the proper term's a trebuchet. lol...still pretty awesome.

Re: pic: "You should never go against a robotics kid"
 

yeah, we had a long discussion about it (see like the first 10 posts) just call it a "catachet"