How about adding a burstdisk between the piston housing and the barrel?

ralphd wrote:

I like beto, got 2 pumps by them, one track and one shock, no complaints whatsoever

Why? I looked at the link and they look like regular pumps. Are they better? How many strokes to 100 psi?

Depends on the tank size

Scopes can be bought even cheaper: http://www.dealextreme.com/details.dx/sku.6280 (price 6,77usd incl. shipping) (also check the scope mounts and other stuff in the "Flashlight, Guns&Lasers" section) There is indeed no sense of putting a high quality scope on a spudgun. (the tuning of a spudgun+scop...

Ahem...

I think you'd better start looking for something else.

LOL, come on, a bot? :D Anyway, its probably a bug because when I log in I get the same thing with other people... (although I've been in the chatroom for hours and hours with no one into it except me(so maybe the chatroom creates a different timeline where chatters get struck untill they log out :l...

A good track pump like this will give you a hell of a work-out, sure beats paying for a gym. I got that pump, and its a nice one, but when you want to go above 6-8 bar(87-116psi) its getting quite hard to pump. I can only go above that kind of pressure with that pump, when I pull the handle up for ...

And yet again, I've uploaded the book to rapidshare:
http://rapidshare.com/files/216712798/1 ... 3.pdf.html

If anyone needs it you can always send me a PM, so you don't need to kick an old topic.

Dawm I love the sound it makes Please damage pics asap, and how about a 3ft barrell?(and a silencer)

Brian the brain wrote:Why is the hammer housing so incredibly long?

I think it's for the hammer to gain enough speed to punch open that schrader valve.

Anyway jack, nice prototype, now go and build a "gun" around that valve!

I got that ebook, I'm uploading at this moment...

Edit: There you go: http://rapidshare.com/files/211551990/1 ... 3.pdf.html

O and btw you could've tried to download it with a torrent program(like I did )

I'm working onto something similair, except my design will hold the barrel by itself, which reduces the risk of barrel-being-the-ammo :roll: You could try to put some duct tape on the inside piece of the barrel (the chamber side), so that the barrel will be hold in there by itself(ofcourse this isn'...

I bought a toy cowbow revolver(plastic) and grinded it down to the correct size, then with a little help of duct tape it was put together

You might try if it responds to infra red light, if so, you can build an "invisible" replacement for the flashlight. As for the relay, I don't know where you are going to buy it(or are able to), but I would just go to a local electronics shop and ask for one that need 4V on the primary side I would ...

Well, if you're 18- then it's illegal when you take it into any public area, because it is officially(according to the law) a regular airgun. So if you are 18+ then you're safe anyway, but you aren't allowed to carry it around and being able to use it in a couple of second(like a loaded airgun on yo...

Good idea, but wouldn't it be better to let the pump piston move back because of the pressure from the torch(in other words: let the torch fill the pump). Then ofcourse push the pump rod down and fill the chamber.

Because pumping as fast as you did in the video is imo screwing the mixture