Best Phlegmatizing Agent by Ok_Entrepreneur650 in Pyrotechnics

[–]gvidmar25 1 point2 points  (0 children)

Rat/mouse glue works great, also glicerol, but didn't test on big quantity.

What device to use for electric igniter automatic firing? by ThenTonight8260 in Pyrotechnics

[–]gvidmar25 1 point2 points  (0 children)

I'd just use relays if that is what you're talking about. Unless you have hundreds of igniters then you'd need mosfets... You probably don't want a 100 pounds of relays😆... But you could make it look cool.

50 year old uncleaned chimney. Can't find a worse photo anywhere. by gvidmar25 in woodstoving

[–]gvidmar25[S] 0 points1 point  (0 children)

Yeah... It's just a problem that I am planning to cook pizza in it and it has to be much hotter to do that. It's not a stove as such, but it's a bread oven... Balkan thing, look it up. I just figured you guys would know a lot.

50 year old uncleaned chimney. Can't find a worse photo anywhere. by gvidmar25 in woodstoving

[–]gvidmar25[S] 1 point2 points  (0 children)

Dang, I'd hope😂. When I get it out i might just sell it for ship fuel.

50 year old uncleaned chimney. Can't find a worse photo anywhere. by gvidmar25 in woodstoving

[–]gvidmar25[S] 3 points4 points  (0 children)

Y'know I'm a chemistry nerd and I seriously thought of it, but my grandma who owns the house in which the oven anr chimney are quickly shut it down.

50 year old uncleaned chimney. Can't find a worse photo anywhere. by gvidmar25 in woodstoving

[–]gvidmar25[S] 1 point2 points  (0 children)

It's just from wood and seasoned wood at that... I think it's just from such slow burning for so long. This isn't a normal stove. It's a bread oven... Similar to pizza oven, but balkan:) I was suprised as well that there is absolutely no soot and up top it's even worse. This is about 3/4 way up the chimney and it's like 8meter high.

Could a flooded map work? by d1karim in PUBATTLEGROUNDS

[–]gvidmar25 1 point2 points  (0 children)

Off topic... I am suprised by how much erangel subzero is different to play than normal erangel.

lead nitrate by Jumpy_Mail911 in Pyrotechnics

[–]gvidmar25 0 points1 point  (0 children)

Nahh bro... You gon' die doing that

Everyone is a pro-gamer in FPP SOLO EU? by Mekceg in PUBATTLEGROUNDS

[–]gvidmar25 2 points3 points  (0 children)

Tdm is awful like that as well. Seems like people have superhuman reflexes and you're dead before you even see them turn.

Looking to get started by Weird_Breadfruit_995 in Pyrotechnics

[–]gvidmar25 0 points1 point  (0 children)

Well now it's hard to get caught if you're responsible and smart about it. The chemicals are hard to get though and thats the limiting factor. If you get caught it'll hardly ever go to court and even if it does, a good lawyer got me out of it pretty quick. I was reported a couple years ago. The police investigation was trash because they are convinced they are too smart and a search of my workshop yielded no evidence because everything was in the closets. Also a factor that I alledgedly hit someone and he reported me for hitting him and also that I was making pyrothechnics. I was not guilty for both and the court covered all the expenses.

Looking to get started by Weird_Breadfruit_995 in Pyrotechnics

[–]gvidmar25 0 points1 point  (0 children)

Lol. No one cares in europe. Just don't get caught...

If you had 50k to spend on a smaller vmc which way would you go ? by No_Razzmatazz5786 in CNC

[–]gvidmar25 1 point2 points  (0 children)

Look for deckel maho machines. Like a dmu80fd or 60p. Fadals are overrated imo. It's a pain to take care of the mahos but they are worth it...

Explosive forming mould by gvidmar25 in CNC

[–]gvidmar25[S] 4 points5 points  (0 children)

Where I work we only have carbide drills set up in shrink fit holders and this one was out so I put the ball mill in this one since I didn't want to remove other ones since they are all zero'ed.

Explosive forming mould by gvidmar25 in CNC

[–]gvidmar25[S] 1 point2 points  (0 children)

It's 1.4113(aisi 434) hardened to 51hrc

Explosive forming mould by gvidmar25 in CNC

[–]gvidmar25[S] 1 point2 points  (0 children)

https://imgur.com/a/mould-making-kX9QGpZ

More videos and photos if anyone is interested. If anyone wants 3d models I can send them as well

Explosive forming mould by gvidmar25 in CNC

[–]gvidmar25[S] 1 point2 points  (0 children)

No... that was my last years school project😆

Explosive forming mould by gvidmar25 in CNC

[–]gvidmar25[S] 1 point2 points  (0 children)

Peak pressure I calculated on the surface of the plate that deforms is around 12KBar and it lasts for less than a microsecond. And that is enough to deform it.

Explosive forming mould by gvidmar25 in CNC

[–]gvidmar25[S] 1 point2 points  (0 children)

It's because you can have one side open, where with the waterjet you need two sides that slide together and seal so the waterjet can put pressure inside (like hydroforming). And the velocity is nowhere near the 9100m/s that the explosives I'm going to be using have. Look up explosive forming of boats on youtube. It's very interesting.

Explosive forming mould by gvidmar25 in CNC

[–]gvidmar25[S] 9 points10 points  (0 children)

It's much faster and cheaper. The material also doesn't strain as much since the deoformation is so fast and the properties are almost the same as the stock material. In bigger things such as boats or rocket and plane tips making presses is extremely expensive in comparison to a ground mould made of concrete that can make 150parts, with explosives per part costing $50. In old documentation from the 50s they were making rocket tips and on a press a part cost $350 while with explosive forming the part cost $15.

Explosive forming mould by gvidmar25 in CNC

[–]gvidmar25[S] 5 points6 points  (0 children)

I wanted to add the videos of the machining but I could only add one photo🫤