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An urge to build a small trebuchet....
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Dogen



Joined: 10 Jul 2006
Posts: 10791
Location: Bellingham, WA

PostPosted: Wed Oct 04, 2006 3:39 am    Post subject: Reply with quote

AfyonBlade wrote:
Was good practice. Smile

for what?
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Darqcyde



Joined: 11 Jul 2006
Posts: 10557
Location: A false vacuum abiding in ignorance.

PostPosted: Wed Oct 04, 2006 3:50 am    Post subject: Reply with quote

SOOO anyway...E-boy...about those plans for a 300mph potato gun? Wink
I'm lucky if I can launch a potato 50-60 yards with the gun I got, though using starting fluid does seem to help a bit.
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E-boy



Joined: 10 Jul 2006
Posts: 1552
Location: Virginia (Much barfiness)

PostPosted: Wed Oct 04, 2006 1:02 pm    Post subject: Reply with quote

There's an article in Popular mechanics on potato guns and other trouble making devices (that's where I also got the initial idea for the trebuchet).

Propellant is the biggy. For example, using lighter fluid with my tennis ball cannon, often got fluid on the tennis balls too, hence the flaming projectiles. For potato gun's butane is a great propellant, and a can of right gaurd will do the trick as well as smelling vaguely of burnt armpits... Also helps to maintain a good seal in your combustion chamber and use and electric igniter. You can drill metal screws into the PVC combustion chamber at an angle to each other so the points almost touch on the inside, and then wire the starter to the heads on the outside. One click potato launching.

Use Schedule 40 or 80 PVC. The cheap stuff will explode on you. Lastly, NEVER point a potato gun at anything alive or that you don't intend to damage. Patatoes have a fair amount of heft to them and at three hundred miles an hour... Well, you get the idea. With some rifling, and possibly different materials you can achieve four hundred mile per hour spuds.
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mouse



Joined: 10 Jul 2006
Posts: 17267
Location: under the bed

PostPosted: Wed Oct 04, 2006 7:37 pm    Post subject: Reply with quote

it suddenly struck me that e-boy is an idaho boy - so i guess he really does know his potatoes.
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mantismag



Joined: 09 Jul 2006
Posts: 81

PostPosted: Wed Oct 04, 2006 9:41 pm    Post subject: Reply with quote

http://www.thinkgeek.com/geektoys/science/81e6/

catapult, trebuchet, and ballista kits.
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Michael



Joined: 09 Jul 2006
Posts: 10697

PostPosted: Sun Oct 08, 2006 12:43 pm    Post subject: Reply with quote

Well?

Is the rope piling up in your garden nicely? When are you expecting the first cartloads of timber?
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Valp



Joined: 09 Jul 2006
Posts: 1513
Location: In a big swedish social experiment

PostPosted: Sun Oct 08, 2006 12:57 pm    Post subject: Reply with quote

Heh, kinda reminds me of a thing my boss had at the medieval-village I worked at a few years ago. He had a wee little trebuchet which were used to lob tennis balls at people from time to time.
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Michael



Joined: 09 Jul 2006
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PostPosted: Sun Oct 08, 2006 1:03 pm    Post subject: Reply with quote

Valp wrote:
yadahyadahydahyoo a wee little trebuchet


a wee little trebuchet Very Happy
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E-boy



Joined: 10 Jul 2006
Posts: 1552
Location: Virginia (Much barfiness)

PostPosted: Sun Oct 08, 2006 9:34 pm    Post subject: Reply with quote

Haven't made it to the hardware store yet. Smile I'm wanting to go to the one I used to work at out in Newport News because they've got pretty much a one stop shopping thing going for this. also I'm gonna wanna slightly modifiy the design so it can stay outside without getting tore up by the weather. I don't their mother is up for having it in the house. Smile
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WheelsOfConfusion



Joined: 09 Jul 2006
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Location: Unknown Kaddath

PostPosted: Sun Oct 08, 2006 9:41 pm    Post subject: Reply with quote

E-boy wrote:
Haven't made it to the hardware store yet. Smile I'm wanting to go to the one I used to work at out in Newport News because they've got pretty much a one stop shopping thing going for this.

Siege Engines R' Us?
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Major Tom



Joined: 09 Jul 2006
Posts: 7562

PostPosted: Mon Oct 09, 2006 1:23 am    Post subject: Reply with quote

yep, right across the highway from fechez la vache
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E-boy



Joined: 10 Jul 2006
Posts: 1552
Location: Virginia (Much barfiness)

PostPosted: Mon Oct 09, 2006 1:24 am    Post subject: Reply with quote

Lowe's smart ass. LOL!

There used to be this one engineer from NASA that always came in and bitched about the miscellaneous hardware aisle... He was pretty out there, but he liked talking about his inventions and patents and I have to admit he really did have some great ideas.
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jeep



Joined: 11 Jul 2006
Posts: 504

PostPosted: Mon Oct 09, 2006 1:31 am    Post subject: Reply with quote

WheelsOfConfusion wrote:

Siege Engines R' Us?


Heaven?
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