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Author Topic: Do NOT Do That!  (Read 7395 times)

Bill St. Clair

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« Reply #30 on: July 01, 2005, 10:39:54 pm »

Well, I got 10 feet of cannon fuse on Tuesday, and bought some duct tape today (didn't find the roll that I already had until I took the new one downstairs). I made two smallish firecrackers with 3 or 4 inches of fuse, which gave plenty of time to get far away (tried the fuse alone before stuffing it into Triple Se7en). Wasn't very loud, but made a satisfying cloud of smoke and smelled just like the black cat firecrackers I used to set off as a kid. I'll try some bigger ones on Monday.
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"The state can only survive as long as a majority is programmed to believe that theft isn't wrong if it's called taxation or asset forfeiture or eminent domain, that assault and kidnapping isn't wrong if it's called arrest, that mass murder isn't wrong if it's called war." -- Bill St. Clair

"Separation of Earth and state!" -- Bill St. Clair

rockchucker

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« Reply #31 on: July 01, 2005, 11:11:26 pm »

Quote
Well, I got 10 feet of cannon fuse on Tuesday, and bought some duct tape today [...] Wasn't very loud, but made a satisfying cloud of smoke and smelled just like the black cat firecrackers I used to set off as a kid.
Yeah, that's my experience with duct-tape based firecrackers. If the point is a bang, remember that confinement is your friend. You might try rolling your own cardboard tubes using the tubes from paper towels or TP. Cut the tube lengthwise first, then experiment with different lengths. Make the tube by wrapping the cardboard around a dowel or rod, gluing as you go, or wrap the tube with tape after you've wound it around your dowel. I suppose any sort of paper would work, as long as you build up enough layers.

I do think that duct tape can work, if you use sufficient wrappings and make sure you have no weak spots. Paper / cardboard seems cheaper and easier to me.

Of course, in keeping with my motto of "Nothing exceeds like excess", I'm now thinking in terms of sonotube.  :ph34r:  :D  
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Bill St. Clair

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« Reply #32 on: July 02, 2005, 12:37:09 pm »

I tried a different design. This time, I folded over a corner of the tape with the sticky-side out, which makes it a lot easier to keep the thing from sticking itself together before you're ready. I used about three times as much powder this time, mostly filling the cone. Then I wrapped it three times, alternating directions. The bang was very satisfying.

My powder scale goes to only 100 grains, so it took two weighings, but the second try at this design, where I covered the sticky outside of the initial cone before pouring in the powder, holds about 170 grains. There's a photo at http://billstclair.com/blog/images/duct-fu...fun-648x486.jpg (74K).

I may now be a felon in the state of New York. What else is new?
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"The state can only survive as long as a majority is programmed to believe that theft isn't wrong if it's called taxation or asset forfeiture or eminent domain, that assault and kidnapping isn't wrong if it's called arrest, that mass murder isn't wrong if it's called war." -- Bill St. Clair

"Separation of Earth and state!" -- Bill St. Clair

rockchucker

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« Reply #33 on: July 02, 2005, 03:09:44 pm »

Quote
I tried a different design. This time, I folded over a corner of the tape with the sticky-side out, which makes it a lot easier to keep the thing from sticking itself together before you're ready. I used about three times as much powder this time, mostly filling the cone. Then I wrapped it three times, alternating directions. The bang was very satisfying.

[...]

I may now be a felon in the state of New York. What else is new?
Ah, now I get the idea. I'll have to try that.

These days, how can one know if one is, by the book, a felon?
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... it is poor civic hygiene to install technologies that could someday
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Roy J. Tellason

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« Reply #34 on: July 02, 2005, 09:07:50 pm »

Quote
Quote
[...]

I may now be a felon in the state of New York. What else is new?
Ah, now I get the idea. I'll have to try that.

These days, how can one know if one is, by the book, a felon?
 
Yer still above ground,  and breathing?  :-0
 
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rockchucker

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« Reply #35 on: July 02, 2005, 09:50:46 pm »

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These days, how can one know if one is, by the book, a felon?
 
Yer still above ground,  and breathing?  :-0
Lots of felons in that category. I have a friend who has, on her record, a conviction for felony littering -- federal.

So don't litter in a national park, in view of a park ranger.
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rockchucker

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« Reply #36 on: July 02, 2005, 10:26:32 pm »

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I tried a different design. This time, I folded over a corner of the tape with the sticky-side out, which makes it a lot easier to keep the thing from sticking itself together before you're ready.
Alright, I thought I had a good mental picture of this process. Alas, examination of the sequence in my head leaves me thinking I'm missing something obvious.

Are you folding the tape in the manner of the 'proper' method of folding the U.S. flag, after the lengthwise folds are done? IOW, start by folding the end corner over to the opposite side, forming a triangle half the size of the width of the tape as a square? Ah, then the next after that, along the bottom edge of the triangle, forms the pocket. Hmmm. Seems that even with multiple wraps -- repeating folding it over, the corners could still leak pressure. But is this how you're doing it?
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... it is poor civic hygiene to install technologies that could someday
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Put a little birdhouse in your soul. -- TMBG

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Roy J. Tellason

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Do NOT Do That!
« Reply #37 on: July 02, 2005, 11:57:39 pm »

Quote
Quote
Quote
These days, how can one know if one is, by the book, a felon?
 
Yer still above ground,  and breathing?  :-0
Lots of felons in that category. I have a friend who has, on her record, a conviction for felony littering -- federal.

So don't litter in a national park, in view of a park ranger.
I don't litter,  period,  but that just makes my point -- it ain't all that hard these days,  the way they keep on elevating things to the level of "felony",  to find one's self in that category.  I've managed to avoid that so far,  but then I don't go out much either.  :-0
 
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Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

Bill St. Clair

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« Reply #38 on: July 03, 2005, 06:05:14 am »

Quote
Quote
I tried a different design. This time, I folded over a corner of the tape with the sticky-side out, which makes it a lot easier to keep the thing from sticking itself together before you're ready.
Alright, I thought I had a good mental picture of this process. Alas, examination of the sequence in my head leaves me thinking I'm missing something obvious.

Are you folding the tape in the manner of the 'proper' method of folding the U.S. flag, after the lengthwise folds are done? IOW, start by folding the end corner over to the opposite side, forming a triangle half the size of the width of the tape as a square? Ah, then the next after that, along the bottom edge of the triangle, forms the pocket. Hmmm. Seems that even with multiple wraps -- repeating folding it over, the corners could still leak pressure. But is this how you're doing it?
Not quite how you fold a flag. A flag is folded at a 45 degree angle. I'm drawing the free end up the tape a little more than that, which makes a sharper point at the tip of the cone. You need a small piece of tape over the tip to keep it from leaking. The tab that you can see sticking out at the top of the cone folds over the top with the fuse sticking out beside it. The first wrap goes parallel to the flap with the tip of the cone in its middle at the bottom. The second wrap is perpendicular to the first, and the third wrap is the same as the first. You're right that this square packet can leak pressure at the corners, but with 170 grains of Triple Se7en, it made a noticeable bang. My daughter and I stood about 20 feet away. I was surprised by how loud it was. My daughter said that she wished she had put her fingers in her ears.

You could do a diagonal wrap around the upper corner that doesn't have the fuse sticking out, and then a half wrap of the remaining bottom corner.  I'll try this next time and see if it gets even louder.

I suppose you could fold the fuse down to enable wrapping the corner it comes out of, but then the fuse would be touching the side of the packet and the burn would likely weaken that side, possibly even causing premature ignition, which would be dangerous.
« Last Edit: July 03, 2005, 06:08:18 am by Bill St. Clair »
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"The state can only survive as long as a majority is programmed to believe that theft isn't wrong if it's called taxation or asset forfeiture or eminent domain, that assault and kidnapping isn't wrong if it's called arrest, that mass murder isn't wrong if it's called war." -- Bill St. Clair

"Separation of Earth and state!" -- Bill St. Clair

Mutly

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Do NOT Do That!
« Reply #39 on: July 06, 2005, 10:25:39 am »

Heh....   Sounds like you're off to a fine start with the duct tape crackers.  

rockchucker-- Yeah I used to make them that way.  Wrap old paper around a dowel for 15-20 wraps.  Glue piece of dowel in end.  Fill with powder.  Glue other dowel in with fuse.  Twist a bit of wire around the middle good and tight to increase pressure.  Worked fairly well, just took a long time, that's when I switched to duct tape...


Now for some flash powder....  A little perchlorate.  A dash of titanium fillings.  Some charcoal dust.....  Now that's a bang.  Just remember not to insult it.  

How's about that hefty lawn and garden bag filled from the welding torch???

Repeat after me.... "Minimum safe distance"  Especially for the kiddies.

This was a fine year for teaching the youngens about dry ice in plastic bottles.
:)
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