Pyro_cat
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Testing EMs during thunder storms
Hi guys and gals,
I read this forum alot since finding it so I finally signed up to share some of my ideas.
Testing EMs can often be quite noisy and can upset the neighbors but if you wait for an lightning storm and all the booms that come with it and did a
test that somewhat coincided with a thunder clap who would notice the difference ?
For less noisy tests revving up and stalling the lawn tractor or motorcycle and making a few backfires and faking like your having motor problems can
also trick people who would otherwise get upset over fireworks.
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symboom
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Ok i see your point very smart idea
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aga
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Utter rubbish.
Ok Kids, hands up if anyone can see a problem with this idea ?
Whoa ! Whoa ! 1 at a time please.
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urea1990
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Quote: Originally posted by aga  | Utter rubbish.
Ok Kids, hands up if anyone can see a problem with this idea ?
Whoa ! Whoa ! 1 at a time please. |
I don't see what could possibly go wrong.
The deep boom of thunder and the sharp 'snap' of primary detonations sound basically the same, amirite?
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SWIM
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| Quote: Originally posted by aga | Utter rubbish.
Ok Kids, hands up if anyone can see a problem with this idea ?
Whoa ! Whoa ! 1 at a time please. |
The gods will take offense at your attempts to imitate their thunder and strike you down for your hubris?
At least that's what a masked chanting chorus told me last time I tried it.
I swear it was almost enough to drive me to cloud-cuckoo-land.
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urea1990
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| Quote: Originally posted by SWIM | | Quote: Originally posted by aga | Utter rubbish.
Ok Kids, hands up if anyone can see a problem with this idea ?
Whoa ! Whoa ! 1 at a time please. |
The gods will take offense at your attempts to imitate their thunder and strike you down for your hubris?
At least that's what a masked chanting chorus told me last time I tried it.
I swear it was almost enough to drive me to cloud-cuckoo-land. |
It's a bit of a pain, really - you've got to make sure there's a thunderstorm and a historical torture re-enactment (for the screaming) going
on at the same time - but sacrificing a brace of virgins to the volcano gods usually does the trick for me.
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sodium_stearate
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Or you could wait until the 4th of July or newyear's eve
when lots of loud fireworks are going off.
Come to think of it, those times might also be
handy for providing background noise
for anything else which may emit a rather loud report.....
"Opportunity is missed by most people
because it is dressed in overalls and it
looks like work" T.A. Edison
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Bert
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Many people choose to fire charges electrically. This has the potential for disaster during a thunderstorm. I have known loaded and wired fireworks
displays to fire nearly everything on the field at once from a nearby ground strike, blasters could tell you stories about such things happening as
well.
As far as the 4th of July and New Year's eve giving cover? In some USA urban areas the fireworks display is a traditional time for gang bangers to
shoot their rivals, since the noise is a lot less noticable- and potential witnesses/victims are mostly looking up, not at their surroundings. Plus
there is a nice large crowd to hide in before and after.
How about digging a hole and doing tests underground. See the good Dr. Liptakov. He has shown pictures of how he made buried galleries large enough to
test EFP performance fired horizontally at ranges sufficient for the slug to fully form, all you need is time, a shovel, some boards and sand. This
also is wise for preventing flying debris from leaving the test site and striking who knows what, or whom.
Boomer used to talk about testing blasting cap performance in a 5 gallon bucket of sand. Inside his apartment. I wonder what has become of him.
[Edited on 5-1-2018 by Bert]
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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The Volatile Chemist
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| Quote: Originally posted by sodium_stearate | Or you could wait until the 4th of July or newyear's eve
when lots of loud fireworks are going off.
Come to think of it, those times might also be
handy for providing background noise
for anything else which may emit a rather loud report.....
|
And then you just run into the same problem as detonating them any other day (at least here), because firecrackers/fireworks are illegal in
residential areas too...
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LearnedAmateur
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Just set up some lightning rods in close proximity to your test site, then you’re guaranteed loud bangs to mask the explosions!
In chemistry, sometimes the solution is the problem.
It’s been a while, but I’m not dead! Updated 7/1/2020. Shout out to Aga, we got along well.
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NeonPulse
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kinda over complicated don’t you think? Just dig a hole or go where you won’t be heard.
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Rocinante
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My pet fish detonated blasting caps in a 5 l bucket (1.5 US gallons) filled with powdered gypsum or flower. Just make sure you cover most of the top
with magazines/two or three books to block the most direct path of gasses and posible fragments. No problems at all.
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VSEPR_VOID
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At least where I live its completely legal to make as much noise as you like so long as you A) are not doing it after 10 PM and B) have a way to
contain what ever is being set off/shot. Its actually legal here to go out into your back yard, in a neighborhood, and shoot so long as you have
something to stop all the bullets. Sometimes you do not need to cover up bang, just know your local laws.
Within cells interlinked
Within cells interlinked
Within cells interlinked
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Morgan
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This Amazing Power of Static Electricity came to mind, the pertinent part starting around the 6 minute mark.
https://youtube.com/watch?v=2sSqzLPMb4s
I too thought of using a storm to mask some noise. The idea was to not only blend in with the sound of an approaching hurricane, but also be the first
on my block to start a pulse jet using the ram air of the preceding gale force winds to get it going instead of using a compressed air source.
Recollecting another event there was a bank robbery in my town which took place during a thunderstorm and heavy downpour. Seems I remember some movies
too where ongoing events mask digging and drilling operations to get to a bank vault.
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Rhodanide
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| Quote: Originally posted by Morgan | This Amazing Power of Static Electricity came to mind, the pertinent part starting around the 6 minute mark.
https://youtube.com/watch?v=2sSqzLPMb4s
I too thought of using a storm to mask some noise. The idea was to not only blend in with the sound of an approaching hurricane, but also be the first
on my block to start a pulse jet using the ram air of the preceding gale force winds to get it going instead of using a compressed air source.
Recollecting another event there was a bank robbery in my town which took place during a thunderstorm and heavy downpour. Seems I remember some movies
too where ongoing events mask digging and drilling operations to get to a bank vault. |
All of this talk about hiding gunshots w/ thunder reminds me of a mission from my favorite game...
https://youtu.be/AKbZPDk9YZw?t=1m1s
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DrP
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| Quote: Originally posted by aga | Utter rubbish.
Ok Kids, hands up if anyone can see a problem with this idea ?
Whoa ! Whoa ! 1 at a time please. |
How rude! This the guy's second post here and you take the piss out of him and put him down straight away.... ffs. I guess this is why the Spanish
reckon British immigrants are a bunch of arrogant bastards. Do we immigrate there and start being arse holes or do the arses just all go there to join
the same club?
Anyway -
5th of November here (Bonfire Night/Fireworks Night/Guy Fawkes Night) - Best time to fire a gun without getting caught or to make bangs. I guess
the immigrant above was suggesting that rain put out the primary or something like that - who knows. If it isn't raining though then why not? Sounds
like others do it too.
\"It\'s a man\'s obligation to stick his boneration in a women\'s separation; this sort of penetration will increase the population of the younger
generation\" - Eric Cartman
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urea1990
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| Quote: Originally posted by DrP | | Quote: Originally posted by aga | Utter rubbish.
Ok Kids, hands up if anyone can see a problem with this idea ?
Whoa ! Whoa ! 1 at a time please. |
How rude! This the guy's second post here and you take the piss out of him and put him down straight away.... ffs. I guess this is why the Spanish
reckon British immigrants are a bunch of arrogant bastards. Do we immigrate there and start being arse holes or do the arses just all go there to join
the same club?
Anyway -
5th of November here (Bonfire Night/Fireworks Night/Guy Fawkes Night) - Best time to fire a gun without getting caught or to make bangs. I guess
the immigrant above was suggesting that rain put out the primary or something like that - who knows. If it isn't raining though then why not? Sounds
like others do it too.
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Yeah, the phrasing might have been brusque.
But wouldn't it be for the better just to be honest about it? If I saw my neighbour sneaking out in a thunderstorm and detonating EMs, I'd be far more
worried than if he popped round and told me what he was doing.
This whole idea seems to be asking for a visit from the feds.
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DrP
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Yea - I'd like to apologise to aga as it goes.... I think I was a bit harsh too. I was stressy earlier, sorry.
| Quote: Originally posted by urea1990 |
But wouldn't it be for the better just to be honest about it? If I saw my neighbour sneaking out in a thunderstorm and detonating EMs, I'd be far more
worried than if he popped round and told me what he was doing.
This whole idea seems to be asking for a visit from the feds. |
You are probably right
\"It\'s a man\'s obligation to stick his boneration in a women\'s separation; this sort of penetration will increase the population of the younger
generation\" - Eric Cartman
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urea1990
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| Quote: Originally posted by DrP |
Yea - I'd like to apologise to aga as it goes.... I think I was a bit harsh too. I was stressy earlier, sorry.
| Quote: Originally posted by urea1990 |
But wouldn't it be for the better just to be honest about it? If I saw my neighbour sneaking out in a thunderstorm and detonating EMs, I'd be far more
worried than if he popped round and told me what he was doing.
This whole idea seems to be asking for a visit from the feds. |
You are probably right
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Don't worry about it. All good!
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Pyro_cat
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| Quote: Originally posted by Bert | Boomer used to talk about testing blasting cap performance in a 5 gallon bucket of sand. Inside his apartment. I wonder what has become of him.
[Edited on 5-1-2018 by Bert] |
Back in the day I had a gross of the old school real M-80s. I was on the beach and dug a narrow hole about 18 inches into the sand dropped a lit M-80
in quickly pushed in sand buried it. Expected to have sand blown into the air but nothing but a tiny thump.
Tried a similar thing that winter but in a pile of snow left by the snow plows. Used the handle of a shovel to poke a hole about three feet into the
snow pile then dropped in the M-80, the result was nothing more then a light flash and very minor thump, the snow pile wasn't shaken at all. These
were good M-80s, from the early 1990s china town, blew my PVC potato gun to bits as we were pretty sure it would but took cover and tried it anyway.
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Laboratory of Liptakov
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The pit in sand ground type, grass around for relevant results (or sawdust or leaves from trees) this light material usually 15 - 20 cm distance from
main charge for exact result. And sand above of all. Example: original low loud sound in 1:30..:
https://www.youtube.com/watch?v=dxJLIk7dStw
Development of primarily - secondary substances CHP (2015) Lithex (2022) Brightelite (2023) Nitrocelite and KC primer (2024)
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JJay
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I am not nearly as into EM as some people (while I am no slouch when it comes to producing conventional devices, I have only done a handful
experiments in that area), so I guess the motivation for this post is lost on me... personally, I avoid ever experimenting with EM anywhere I
wouldn't discharge a firearm, and even though most hobby EM stuff is legal, my advice is to act at all times as though if you are observed you will be
taken prisoner by an oppressive military and treated as a terrorist. I would avoid experimenting with EM in a thunderstorm since I don't like playing
in the rain.
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Bert
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It's been quite a while since USA law enforcement attitude on aprehending kids who were experimenting with EM (no dammages/injuries resulting) was
"boys will be boys, no harm done, we and our friends did that too".
So if you simply must experiment with HE, keep it non obtrusive.
I have several times felt a very obvious ground shock wave through my feet at times and in places where I would not have expected it. Sometimes it was
found to be from authorized commercial blasting. Other times, it might well have been one of YOU playing?
No above ground signature = no idea where to complain about it for those who might not like it. A huge BOOM! + a column of dirt/smoke going several
hundred feet in the air, not so much.
If all you want is an enormous KABOOM! and you're not into recording other data, you may well end your EM experiments as a statistic for homeland
security while they are lobbying for next year's budget increase.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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Pyro_cat
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OK
"Researchers looking to capture the acoustic signature of thunder had to make their own lighting. A rocket fit with a grounded copper wire trail was
blasted into a thundercloud so the wire could conduct an easily traceable shaft of lighting electricity."
https://www.youtube.com/watch?v=uvTeI74fVhE
The researchers said they hope that future work will help tease out more information about how the crashing sound of thunder is generated.
[Edited on 3-5-2018 by Pyro_cat]
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