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Spring-piston guns.

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: Mitchza89 » Fri Nov 23, 2007 3:39 am

:shock: Pretty impressive?..... Thats the nicest looking gun I've ever seen...
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Unread postAuthor: psycix » Fri Nov 23, 2007 3:43 am

MaxuS wrote:
Ragnarok wrote:I have astounding skin resistance), and electromagnets have difficulty trapping your finger.


All people with ginger hair do, i would know, i am one.
Theres a reduced pain response to electroshock, but increased pain response to heat.


Is that true? :shock:
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Unread postAuthor: Wombat » Fri Nov 23, 2007 3:44 am

Theres also a video of it cycling (not shooting) on the second page, takes forever to load the video though.
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Unread postAuthor: MaxuS » Sat Nov 24, 2007 3:42 am

psycix wrote:
MaxuS wrote:
Ragnarok wrote:I have astounding skin resistance), and electromagnets have difficulty trapping your finger.


All people with ginger hair do, i would know, i am one.
Theres a reduced pain response to electroshock, but increased pain response to heat.


Is that true? :shock:


It is indeed

http://en.wikipedia.org/wiki/Ginger_hair#Sensitivity_to_pain
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Unread postAuthor: Ragnarok » Sat Nov 24, 2007 9:50 am

Ah, we're not talking just about insensitivity, I can test my skin's resistance as being many times higher than just about anyone I know.

Besides, red hair is not the main factor for me. It's not uncommon for people with Asperger Syndrome (like me - it's common in my family) to have insensitivity to pain of all types.
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Unread postAuthor: psycix » Sun Nov 25, 2007 3:33 pm

How can your skin resistance be higher then the resistance of another person?
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Unread postAuthor: Ragnarok » Sun Nov 25, 2007 7:50 pm

psycix wrote:How can your skin resistance be higher then the resistance of another person?

Exceptionally dry skin. We made moisture detectors in technology classes, and just about everyone could set them off with their hand by touching both prongs at the same time. Damned if I could.
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Unread postAuthor: psycix » Mon Nov 26, 2007 5:36 am

Ragnarok wrote:
psycix wrote:How can your skin resistance be higher then the resistance of another person?

Exceptionally dry skin. We made moisture detectors in technology classes, and just about everyone could set them off with their hand by touching both prongs at the same time. Damned if I could.


AWESOME
I also want that!
Have you already tried touching the AC outlet on your wall? :D
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Unread postAuthor: Mitchza89 » Mon Nov 26, 2007 5:39 am

Mmm yep I'm still compelled to make a simple small spring-piston bb pistol just for fun and to annoy my mates. *Starts drawing up plans :D*
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Unread postAuthor: Ragnarok » Mon Nov 26, 2007 9:14 am

psycix wrote:Have you already tried touching the AC outlet on your wall?

I've had two mains shocks if that's what you mean (which is 240V in the UK). Not intentionally, but I'm still standing.
And many many, 350V DC shocks from overcharged camera caps, and quite a few of those straight across the body. That's enough to send quite a few people in to fibrillation.
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Unread postAuthor: psycix » Mon Nov 26, 2007 2:42 pm

Ragnarok wrote:
psycix wrote:Have you already tried touching the AC outlet on your wall?

I've had two mains shocks if that's what you mean (which is 240V in the UK). Not intentionally, but I'm still standing.
And many many, 350V DC shocks from overcharged camera caps, and quite a few of those straight across the body. That's enough to send quite a few people in to fibrillation.


Holy crap, you should feel lucky that you are still alive!
350V capacitor discharges are very very lethal.
If you didnt have the "resistance mod" you would be dead by now.
I recommend you to be careful in the future because you wont be able to rely on the resistant skin for each shock.
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Unread postAuthor: Ragnarok » Mon Nov 26, 2007 3:53 pm

psycix wrote:Holy crap, you should feel lucky that you are still alive!

And people don't believe me when I say I'm nearly immortal - I've been hit by cars, taken minor stab wounds, nearly electrocuted, smashed through glass windows, survived "explosions" - well, at least, this time that's right... I got away with it all, I'm still alive.

I'm always careful, but depending on how you look at it, I am either very unlucky to have had all those things happen, or very lucky to have got through all of them.

And, I'm throwing in more song lyrics... damn it.
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Unread postAuthor: Hotwired » Mon Nov 26, 2007 4:18 pm

Dry skin provides aproximately bugger-all resistance :P

A pot plant tester voltage p'raps but 350v won't even notice.

Having two cap prongs touch you is unlikely to kill simply because the shortest path is the tissue between them and unless you've been a total muppet and touched a prong with each hand, the current wont go through anything you reply on to live.

T'is why one-hand-working on live mains circuits is, in theory, safe.

I've had a live mains shock when I was small by pushing a plug without the back cover screwed on, into a live socket. I recall flying back a bit and having a painful burn on one finger, not unlike a scald.

Red hair doesn't make you any less liable to die than the rest of us when in contact with lethal forces :lol:
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Unread postAuthor: Ragnarok » Mon Nov 26, 2007 4:57 pm

Hotwired wrote:Having two cap prongs touch you is unlikely to kill simply because the shortest path is the tissue between them and unless you've been a total muppet and touched a prong with each hand, the current wont go through anything you reply on to live.

Well, let's say I was a total muppet... more than once.

My skin is still many times more resistant than anyone else I know outside of my family. Most people are about 500K to 1M ohms with dry skin, a lot less with slightly damp skin... I read about 10-20M ohms, no joke. It varies quite a bit from day to day - on some days it is too high to measure. And I think 350V notices when it hits 20M ohms.
I also give off far higher voltages than most people, although not as high some people, who give off voltages that will affect TVs in the vicinity.

I'm being entirely honest here - I know I'm just some weird freak of nature, but it keeps me alive. Perhaps I'm part of the first generation of mutants.
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Unread postAuthor: Hotwired » Mon Nov 26, 2007 6:43 pm

Must've been one of those low resistance days you've been getting the shocks on then.

20,000,000 ohms will block the current at 350V to a tiny 0.0000175A

In other words you could stick your fingers in a live plug socket and not notice as the minimum current that can be felt is 0.001A.

On one of these 20mohm days you should try putting a charged 350v capacitor across a fingertip. Preferably on camera. If you get shocked you should (a) show us the video for a laugh and (b) get a better meter.

How are you measuring it anyway? For 20mohm you'd need an insulation test meter really and those beggars put out 1-15KV to get a decently readable current through.
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