JSR- what sort of battery can you use to heat that wire- what sort of voltage is required? This may have to lead to another prototype
I'd be more worried about the current it draws. The nichrome wire I have is 13Ω/m so for a 10cm length at 9v it would be attempting to draw ~6.9A. Don't expect the ...

I don't think your meant to talk about shooting at living things, a spider is a living thing.
Pretty cool concept though.

Not to be rude, but I'm kinda surprised that you don't seem to know much about BB guns considering you have built air cannons before. There are quite a few similarities and there is a lot of info in the different threads here.
I would just build the cloud or vortex as already mentioned, they chew ...

do NOT open link if you dont like blood
idk if you have seen this its what happens when crap goes wrong with a full size, are you sure your up to using your mates lathe.

sure you think you know whats going on, but the guy dead in the pic is probably a machinist with years of experience of under ...

That's pretty cool. For the price I would question it's quality though. Although I'm not the one buying it. Haha
I guess as long as it is looked after it should be fine.

Just curious...why does your ~12-13 year old friend own a lathe?
It's probably his dads.
Just like I'm using 'my' iPad now. Haha.
Anyway, isn't 'your' stuff legally your parents until your 16 or whatever?

I'd get the xbox, and see if you can use a lathe at some place. You don't want to spend ...

Like I said, I do but I don't. I kind of want an xbox, but at the same time I want a lathe. Its 50/50 for me, because I can either get really good at video games which will lead no where but alot of online glory, or get really good at machining which will lead to possibly a job and glory of being ...

I would not try to ship something that large transcontinental. Have you checked Ebay/Craigslist/classified ads?
From the states to New Zealand 2 30kg subwoofers was going to cost me several hundred US dollars in shipping. I flagged that for local second hand ones.
You'd spend more on shipping the ...

I would argue about my dislike for the no having 2 posts in a row or bringing up a thread that is a little bit old rules, but I probably wouldn't get very far with it. Editing doesn't bring a thread to the top does it? So if I have an update on a project then how do I let people know?

Double ...

In some forums, not searching is a permabannable offence. And those forums aren't "that" uptight.
that is just silly though. You cannot prove that you have searched and found nothing, or that you haven't searched at all. You cannot always find specific enough information to answer a particular ...

HI Ya everyone :)
Now im a total noob to the whole with the whole homemade airsoft/bb gun stuff so forgive any stupid questions :(

But iv been looking through the forums for a basic semi auto gun that i can use in a skirmish with some mates.
Now im from Australia so buying one is out of the ...

Do you realize that I was only making an example? Enough flaming, its just a point. I know I can't propel a airsoft bb 500m, and it would need a huge cannon to do it, plus an amount of money that I don't have. But I am still going to try this, its not going to be some 3inch chamber to a 1/4" barrel ...

DYI, I would develop some sort of flash hider/silencer to quiet and reduce the visibility of it, and of course be covered in foliage.

In my example, roughly ten megajoules of energy would be dissipated into the first few metres of air in front of the muzzle, heating it to temperatures high enough ...

Why do you need to hide the fact that you are making such a thing? It sounds like you skirmish with you're friends so I'm guessing you have an airsoft gun. What makes this project any different?

If you can get it to work it will be cool, although I agree that 500m is very optimistic. Haha

quick question on barrels, for metal bbs and airsoft. metal bbs are .177 of an inch, closest normal american unit is about 6/32 which is .1875, is that close enough? i know a tight bore airsoft barrel is like .03 of a mm bigger then the bb which is like .00012 of an inch, seems like a big gap to me ...