Casings

[Jago]

Originally Posted by Kataklysm

I use the launch tubes from Saturn missile batteries.

Yes that's a common item we find lying around the household.
What the?

PVC pipe or cardboard are probably the best casings you can use. At the moment I have PVC pipe coming out of my ass (well, very very readily available, for free).

[Kataklysm]

I was just saying if you ever go to a fireworks store somewhere you pick one up and strip it down you have 100 ~ 200 casings or bigger all depending on what size you get obviously. I like using them for simple black powder/flashpowder explosives.

*EDIT* Rofl at you post count (immature I know.)

[ZX980]

ok, i have a question, what is the point of a blasting cap, couldnt you just spare the resourses and use a longer fuse?

[Kataklysm]

Originally Posted by ZX980

ok, i have a question, what is the point of a blasting cap, couldnt you just spare the resourses and use a longer fuse?

The blasting cap gives a greater heat than fuse so some mixtures can only ignite with something hotter than a fuse.

[Shalshaska]

Originally Posted by Kataklysm

The blasting cap gives a greater heat than fuse so some mixtures can only ignite with something hotter than a fuse.

It's not about heat so much as about speed and pressure. Some compounds called primary explosives) are more sensitive than others, and can achieve DDT (Deflagration to Detonation Transfer) in rather small amounts. These compounds are ideal for blasting caps. Other explosives (called secondary explosives) are less sensitive, and require a shockwave (provided by the blasting cap) rather than a simple flame.

[The_enemy_hacker]

What i have always done in the past is roll alluminum foil a couple times around a pencil or expo. determines on the size wanted. Then for the ends soak tissue paper with elmers glue and like absorb it and ball it up on the ends. works great and doesnt stop fuses or pop off or mess up.

[Jago]

Decent idea, but I'd say not the greatest if dealing with peroxides(peroxides + metal = bad).

[Widigo]

From what I can tell materials are either going to be unfriendly to plastics or dangerous around metal. What can be used that will hold soundly, and not cause premature explosion.

[Shalshaska]

PVC is best for chemical stability, but some people like to say it's bad since it won't come up on metal detectors. I only support this fact if you're standing within 20 feet of it upon detonation, because PVC has less mass, and less inertia, whereas a chunk of metal will retain high speeds for a longer time.

[Widigo]

Why would you want an explosive device to be detectable?

I understand that this forum is about casings, not just for blasting caps but for explosives of all natures. So, posting my question here seems safe. (Yes another question)

Would using a glass test tube to hold black powder, and then using a stopper that had a hole in it made for connecting rubber hose to the tube work. I think that if fulled and you ran a fuse through the stopper's hole it would work quite well. What do you guys think?

[Shalshaska]

You want it to be easily detectable if it is embedded several inches into your flesh

[Vallen]

Originally Posted by Shalshaska

You want it to be easily detectable if it is embedded several inches into your flesh

LOl no, I want tiny pieces of metal embedded in my skin.

They make nice piercings.

[Jago]

General rule of thumb. Don't hang around during a detonation if you want all your limbs/want to stay alive
PVC is good because it won't react with the organic peroxides. And also has the other advantages previously mentioned by Shalshaska.
Your test tube idea will work, just don't hang around when it goes off (glass shards can be a bitch to get out ).

[Widigo]

How far do you think it would propell the glass?

[Jago]

far enough for me not to want to risk it

[Widigo]

In you're professional opinion would said glass fly hard or fast enough to harm a person that was wering thick clothing from say 10 ft? I know this sounds like a strange question, but humor me.

[Shalshaska]

There are just too many variables to ever be absolutely sure. You can make your odds better, that's it.

[Widigo]

Is there a size requirement on Pipe for explosives? If you wanted a small contained explosive could you use 3/4" PVC?

[Jago]

why would there be a size requirement? :S

[Widigo]

For effectiveness, or safety, not a requirement, but a suggested size.

[Jago]

varies depending on application and desired effect. Allot of variables come into play.

[bob]

Ok I have been interested in explosives for a long time (The knowledge part not the doing part) and I have read this topic and gone... WTH is rolling? I undertsand the movement of rolling but could anybody explain this a little better for somebodyt with no idea?