Ive made a few ballistas over the years, most simple being a lager siege crossbow with a winch for the bow. They are great fun to build, just make sure you have quite a bit of time. My last one took me about 2 weeks.

If you want a rerally fun peice of weaponry to make, id go for a repeating ...

Thanks Pimpmann, i wanted to have a launcher that had a large chamber volube but without the large size, so having 2 additional chambers added on to the traditional the 2 under the barrel helped tro achieve this. i think it may improove the air flow as well, but im not sure.

Iwas suprised with how ...

yeah, i tested it last night.

it goes through 8mm ply with ease, using a 3 gram potato slug

went straight through a 160 page magazine with a loud cack, it compleatly ripped the last 80 pages in half

through both sides of a tin can, really impressive, video coming soon

ripped the bark of an old ...

Hello all

here my latest cannon

all copper construction, 22mm chambers, 15mm barrels, 130-40psi

GGDT predicts 750fps with a 3 gram potato

time for the eye candy

cheers for that

any chance of this being moved, of do i need a pic of the whole gun, kinda difficult as its 2 m long and my web cam cant even focus on a dime

i cant see a pic, just an advertisment that says image hosted by tripod.

This is a copper piston cannon, made from 22mmm and 15mm pipe. it mainly uses solder joints but there are some compression joints that are used to access the insides of the valve.

The barrel is 1.5 meters of 15mm pipe, it has a "barrel extantsion" "for looks". The chamber is 1.5 meters long and ...

ahh ok, ill just call it a barrel,extentsion then. wierd law

8) 8) 8) 8) 8)

i've never heard that law, i live in the UK where you're not allowed guns to im sure a silencer for a recreational activity is allowed

it is a silencer, its got the barrel extending into it with hoels drilled in, the cavity in between is filled with wire wool, and it works like a silencer

i have a copper piston gun: http://www.spudfiles.com/forums/viewtopic.php?t=410

i was wondering how much pressure should a piston of that size need to be moved back?, the piston has about 1 mm clearance around its self and the chamber.
i konw this is vague but its really hard to describe without ...

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