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cool miniature catapult

Posted: Sat Nov 10, 2007 6:44 pm
by 666lucky693
I had to make this for my senior project. I goes pretty good its made out of wood rope a fiberglass arm and a pvc screw cap as the basket here is a vid

Posted: Sat Nov 10, 2007 6:51 pm
by jrrdw
I wanna see a video of this working. Whats it made out of? Details my good man, details. Looks really neet.

Posted: Sat Nov 10, 2007 7:44 pm
by 666lucky693
Ok i fixed it and i uploaded the video to youtube

Posted: Sat Nov 10, 2007 8:15 pm
by Novacastrian
Ok, i like the simplicity however in the vid it seemed a little under powered.
I voted bigger would be better- most things are, except women :P
Any idea on the draw weight? Oh and weight of projectiles?

Posted: Sat Nov 10, 2007 8:17 pm
by 666lucky693
well in the video the projectile was a snowball and it went 20 feet and hit a wall

Posted: Sat Nov 10, 2007 9:38 pm
by noob of noobs
That's pretty nifty. I too though would apreciate a larger model; something that can deliver a larger payload farther with more force. What I really want to know though is the effect upon the target. Any cool damage pics?

Posted: Sat Nov 10, 2007 11:03 pm
by 666lucky693
damage pictures aint gonna happen cause of it being hard to aim and i wanted to build it bigger but the fact it would take too long and i would lose intrest

Posted: Sun Nov 11, 2007 7:03 am
by jrrdw
Looks like you anteked the wood with a tourch??? I voted Fricken Sweet! I like it! Fun fun fun!!! 8)

Posted: Sun Nov 11, 2007 7:43 am
by dauphinoise potato
That's a nice idea it looks like it uses a torsion bundle for the power. Those are called onager's. To get much better range add asling to the end of the throwing arm, like a trebuchet, it will greatly improve performance.

100posts wooooooooooooooooooooooooooooot :D

Posted: Sun Nov 11, 2007 11:44 am
by jimmy101
Here's my mini treb.

Knocked it together one day based on a single online photo. My WAG's at the various dimensions were way off, the main towers should have been twice as tall, the throwing arm longer etc. Throws nuts.

Posted: Sun Nov 11, 2007 12:02 pm
by iknowmy3tables
wow that mini is sweet jimmy I could almost swear that it's a hobby building kit or something that you bought

Posted: Sun Nov 11, 2007 7:38 pm
by 666lucky693
i did torch the wood and it uses rope wound up for torsion and i just got done building a mini scorpion bow thing

Posted: Mon Nov 12, 2007 11:25 am
by jimmy101
iknowmy3tables wrote:wow that mini is sweet jimmy I could almost swear that it's a hobby building kit or something that you bought
Thanks.

The wood was just something like 1/2"x3/4" trim wood, nice straight stuff comes planed smooth, from the hardware store. But, everything I used I had laying the garage already.

The wheels are just slices out of a big-ass dowel. The axles are standard dowels (1/4"?). The pins that hold the various axles in place are pieces of toothpicks. The weights are hunks of 3/8" allthread.

I've got a nice compound sliding miter saw so chopping the pieces was simple.

It is glued and finish nailed together (I have a small pneumatic finish nailer).

Slapped a quick coat of wood stain on it.