Slamming a CO2 cartridge into a hollow needle will give truly miserable flow. If you are firing BB's this might be acceptable but then why violently puncture the cartridge at all. This is how people smash the sealing disk with a spiked piston to blow out a parachute for a rocket/uav with the vented ...

Main question is why not just fire a bunch of pellets like a shotgun from one barrel.

No.

By the look and sound of it it's a battery powered high speed fan which is enclosed to produce an air jet.

Pressure will be trivial, it's only moving dust.

Heh. I'd like to but I'm not in a great position for covert cannoneering. Wasn't much opportunity when I made it and even less now. Still have ideas for creative medium cannons but unless I move to the country with a small attached wood it's really not worth it. Currently in a terrace with another t...

Depending on how accessible things are for you, low temperature melting plastic can be a good material to shape things from. Often sold as Polymorph it's original name is Polycaprolactone, can be softened with hot water, hot air gun, microwave into a soft treacle like state which sticks viciously to...

So why does your mother have a sprung latch with a key slot on both sides? If it's not sprung how was it locked with the key on the inside? If it is sprung with a key slot both sides it can happen again, replace it with a nightlatch which only needs a key from the outside. From the inside its a knob...

Only way a pneumatic cannon is going to unlock a door is if you load it with a beanbag and blow the lock off.

dingdingdingdingdingdingdingdingdingdingBOOM 8)

wyz2285 wrote:By filling up the blocked end, short pressure drop trigger a small burst. Putting it back to position, exhaust the air trapped in the blocked end, preparing for another shot. I'm on my phone, can't make a diagram.

http://www.spudfiles.com/forums/viewtop ... tml#110053

I'd be interested in how much gas the vortex carries from the chamber with it. Would be interesting if it could transport combustible gas from a pneumatic chamber to a target. A kind of container free FAE launcher. Massive losses on the way I'd expect but not of anything very expensive. Believe the ...

Yup but as I said 1300V is way too high. Look for a 2 pole one with about a third of that voltage rating and it will all work. The circuit is not designed for a voltage that high, you can see I've specified a 400V capacitor and a 350V spark gap. A 1300V spark gap does not compute if the circuit outp...

Pneumatic catapult

Ram -> lever -> projectile

Every time I post this I have to go search for my posts containing the word "pancake" because I can never find the page it's on :P http://www.spudfiles.com/forums/files/spring_688.jpg But yeah, springs are bad, mmkay? In terms of practical hybrid bumpers, they rate slightly above small woodland cre...

Speaking of uksgc, is it just me or has the site been shut down? http://www.uksgc.co.uk/ Says "account suspended" on my end. I haven't been there in months so I wouldn't know what was going on. It's been down a long while now. Nothing positive was going on there anymore so the owner/host stopped ke...

shannydez wrote:i guess using such type of stuff is much better with less effort, what do you think?

I think you're a bot.