relatively safe detonators

[andreas]

I've just succesfully tested 3 detonators.
They had a base charge of mhn about1,5 grams.
on top of this I pressed matchhead powder with additional magnesium powder. about 30% magnesium.
For the the tube I used a machined aluminium tube(this because I can't find suiteble tube material), with one opening.It detonated everytime.
This is the nost safe detonator i have ever made .
Much safer than hmtd or ap det's
If this a silly post then tell me I have been drinking so that's why

[Madog555]

hm, that sounds awsome, maybe flash+PETN will work. that would be nice. i do like my primary though.

[Mr Cool]

This belongs in the LE section.

(Although it does sound quite good... please be more specific about how the MHN was pressed, what form it was in, and approximate density if you can.)

<small>[ June 01, 2002, 01:25 PM: Message edited by: Mr Cool ]</small>

[andreas]

Sorry but I thought I posted it in the LE section.
it was a 2 gram mhn base charge pressed to 1,2g/ml and a smal amount of mhn with a density of 0,8 on top of that.
I made some little Mg swirlings from a solid block with a cheese grater wich are quite easily ground to a finer(but still coarse) powder.
This I mixed with matchhead's of a ratio Mg:MH 4:6.
this was pressed on top of the mhn.
Then fuse it and lite the fuse .
I don't know if it fully detonated but only very small Al particals were recovered. The Al blasing cap was 8mm outer diameter 0,5mm wall thickness and 60mm long.

One failed attempt sofar I'll do some more tests on reliability

<small>[ June 01, 2002, 06:25 PM: Message edited by: andreas ]</small>

[andreas]

I have recovered the failed det. and it seems that the mhn didn't make the full deflagration to detonation transmission. The magnesium matchhead mix burned so hot that the sube is wrinkeled and half of the mhn has dissapeared so maybe one should use a other basecharge like tnp with 0,6g/ml mhn on top.
But as I said I do some further testing.
P.S. I think it is discussed before, but is tnp compatible with aluminium

[stanfield]

I think TNP is compatible with NO metal...
I personnaly use DDNP+PETN, they work pretty well, and ofcourse, they are extremely powerful...

I ordered 100 g of sodium azide so I will soon test Lead Azide in a detonator with PETN.
=> Question about lead azide manufacture : could I use a magnetic stirrer when mixing the two solutions ? or will I be obliged to use my arms ? :)

If you got another info/safety about lead azide and it's manufacture, let me know plz !

see ya !

(If you want to know about lead azide, please start a new topic. That way we won't end up discussing many different things in the same place. It just makes life simpler...)

<small>[ June 02, 2002, 08:22 AM: Message edited by: Mr Cool ]</small>

[xoo1246]

</font><blockquote><font size="1" face="Verdana, Arial, Helvetica">quote:</font><hr /><font size="2" face="Verdana, Arial, Helvetica"> If this a silly post then tell me I have been drinking so that's why </font><hr /></blockquote><font size="2" face="Verdana, Arial, Helvetica">Hope you don't drink when you make/use explosives.

[Mr Cool]

Thanks for the extra detail.
One more thing: was the MHN a fine powder, large crystals, small crystals...?
I've got a couple of grams of MHN drying out now (low-density grains, formed by dumping a hot concentrated solution of it in acetone into cold water and stirring it around), so I'll do a few tests of my own...

[andreas]

No I don't drink when making usingexplosives, but the drinking could explain why I posted it in the wrong section.\
My mhn was in a fine powder and hand pressed.
After that I calculated the density.

[mongo blongo]

Can MHN be dead pressed? This could have happened.

[Mr Cool]

I suspect that it is impossible to press it so much that it can't be detonated by primaries, but at high densities it might not be able to detonate in this kind of detonator.

[andreas]

I think the reason that one det. did't go off was because all the others had a little hole driled about halve a centimetre deep into the mhn charge, on wich the Mg/matchhead mix was pressed.
The one that didn't have that didn;t detonate.

<small>[ June 02, 2002, 07:16 PM: Message edited by: andreas ]</small>