How to make Mechas?

[displayfireworks1]

I will give member Countryboy7978 credit for this one. In one of his post he mention the Columbian game Tejo. When you watch this video you will understand how it works. It involves alcohol , throwing something and explosives. LOL The explosive device is called a "Mechas" . When I search this device it just says the device contains gunpowder. We of course know it has to contain something else. A few years back Skylighter tried to solve this Mechas issue, not sure if they ever did.
If you think you know hoe these are made please comment. These are for sale in Columbia and commercially made, however there are those that try to make their own and get hurt.
Here is some video about the game called Tejo.

https://www.youtube.com/watch?v=iqKzt0XbWQk

https://www.youtube.com/watch?v=PPXkuAndxr0

https://www.youtube.com/watch?v=o16LyndAY2U
http://clubdetejoelporvenirdelnorte.com/imagesnew2/0/0/0/0/1/9/6/2/4/7/dimensiones%20tableros%20y%20caja.jpg
http://www.clubcomerciopereira.com.co/wp-content/uploads/2012/03/tejo.jpg
http://www.eluniversal.com.co/sites/default/files/15EXPLOSION.jpg

[countryboy7978]

In Spanish polvora means gun powder however they sometimes don't differentiate between the types of gun powder. Polvora or polvora negra is black powder, polvora Blanca is white gunpowder known here as whistle mix made with chlorate and silicicate or benzoate, and polvora flash or polvora dinamita is flash powder typically made with chlorate.

The mix in tejo mechas is most likely sulfur/chlorate and either sand or powdered glass. If you have ever seen the yellowish mass inside a railway torpedo you know what I mean.

[NWPA]

"yellowish mass inside a railway torpedo" I know what you mean by that I had a number of those when young. They were easy to come by in the rail yards. They are long gone from the railway scene.

[countryboy7978]

"yellowish mass inside a railway torpedo" I know what you mean by that I had a number of those when young. They were easy to come by in the rail yards. They are long gone from the railway scene.

A friend of mine's company used to make them.

[NWPA]

Reminiscing once again, back in the 50's [yes I'm old] some of my friends had a brother or two working for the railway and they would bring these railway torpedo home. And using the strap that was attached to them would wrap them around a suitable tree limb and whack it on the sidewalk. Loud, yes. Crazy, yes. In the days when class B stuff was readily available, crazier still.

[displayfireworks1]

Just happen to have a video about it. LOL
This is my Railroad torpedo video from 2008. I was unsure what to expect when they off because I imagined they were going to be as loud as an M-80. As you can see in the video starting at the 4:20 mark, it sound like a roll of caps. These are probably designed to be compressed hard by the locomotive as it passes.
I always remember the day I made this video because there was a bridge sign saying the walkway was not safe to walk on, so I walked on the railroad ties as I crossed the bridge, I must have walked onto a bee nest and my ankle was stung multiple times. Then I was thinking if the device was loud and someone called the police, here I am with sledge hammers and explosives. They would think I was trying to damage the track to cause a train accident. LOL That is why I did not keep setting them off.

https://www.youtube.com/watch?v=iOCzwoWozC8
.
Here are other railroad torpedo videos. As you can see there are not as sensitive as the Mechas.

https://www.youtube.com/watch?v=ToayYFfPDHw

https://www.youtube.com/watch?v=qf8Y-Q3OhQQ

[NWPA]

Beautiful, Love videos of "stuff" like this. Folks curiosity of old pyro items pleases me as much as a nice breaking aerial shell. I once saw at a dealer a case of Chinese knock off bulk packed silver tube salutes. They were packed side by side, paper fused, loose powder everywhere. I would love to see a picture of these. Anyone have one?