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Re: Tesla Coil Firehazards (Exploding paint cans) (fwd)
---------- Forwarded message ----------
Date: Sun, 12 Aug 2007 21:16:56 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: Tesla Coil Firehazards (Exploding paint cans) (fwd)
Nathan,
I really don't want to get involved in this, as I am not the type of
person to pick a fight. But, Something is bugging me and since nobody has
said anything, I will. Why are you operating your coil when not present? I
would consider it to be much more dangerous than say, a lit stove (fire,
explosion, etc.). I would never operate any of my apparatuses without me
being there, or somebody at least as, or more knowledgeable as I (not
somebody who would let it strike anything at all except intentionally, and
not a hydrocarbon filled can). If room is indeed a problem, roll it
outside, I don't have the luxury of garage space, my large coil lives in my
front yard (which means every time it rains, I have to cover it up, and when
I get water in my MOT oil, I have to freeze it, and pick it out (which is
not fun, the dead bugs are even worse!). I live with this, so that nobody
gets hurt, there is nothing to strike, except the strike rail, and whatever
objects I put near it. I have my opinions about your whole story, but I
will keep them to myself, because I am good like that. Please do everybody
a favor, and practice safe coiling (either move the coil out, or limit the
input power to safe levels). If you need to do an extended run for whatever
reason, be present, or at least have somebody properly trained and briefed
keeping a very, very close eye on it (preferably the former). Coiling is a
cool hobby, but (like most cool hobbies unfortunately) there is serious
danger involved. If your paint can did indeed explode, do everything
possible to prevent it or other similar disasters next time (and don't get
too defensive, if your story is true, you know it and that is all that
matters for now, time will prove you correct and you will have bragging
rights. If your story is false, then I feel bad for you, you have opened a
rather large can of worms). Be safe.
Scott Bogard.
>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: Tesla Coil Firehazards (Exploding paint cans) (fwd)
>Date: Sun, 12 Aug 2007 06:50:26 -0600 (MDT)
>
>
>---------- Forwarded message ----------
>Date: Sat, 11 Aug 2007 21:04:35 -0700
>From: Nathan Stokely <50kva.54uf.750a@xxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: Tesla Coil Firehazards (Exploding paint cans) (fwd)
>
>As I have stated. This is what I assume happened. I did not send this email
>in order to be ridiculed by sceptics. I frequently operate my coil without
>me present. I also let other people use it. Sure there are problems with
>what I say. I can only speculate as to what exactly happened. The paint was
>white primer. No I do not have the coil. Every thing but the coils
>themselves (primary an secondary) and the toroid sits several feet from the
>coil so that equipment suffered no damage, (other than burns on the plastic
>case I keep it in.) It has not burned down my garage. I am just stating
>that
>that is what may happen if you do not put the fire out quickly, or if you
>are in a small garage. When I say 125VA I am using 15KV*5MA. That is the
>rating on my power supply. Which was purchased from Information Unlimited.
>That is the output they claim. I do not have the equipment to test this
>myself.
>
>On 8/11/07, Nathan Stokely <50kva.54uf.750a@xxxxxxxxx> wrote:
> >
> > Well, I assume that the streamer went to the seam on the can. This is
> > because the seam has no paint thus making it slightly more conductive
>than
> > the rest of the can. When I have had this happen, I have not been paying
> > close enough attention to know exactly how it happened. Because of the
> > nature in which I use my coil, it is totally possible that the streamers
> > were striking the can for an extended period of time. If anyone knows
>the
> > exact temperature of the average streamer, please let me know. I am not
> > always watching my coil when it is in operation. I suppose it would be a
> > good idea to have a highspeed cam watching the coil and put a paint can
>in
> > the streamers for an extended period of time to see exactly what
>happens.
> > However, I am not going to try this. I will let somebody else (like a
> > pyotechnician) replicate this.
> >
> > On 8/11/07, Tesla list < tesla@xxxxxxxxxx> wrote:
> > >
> > >
> > > ---------- Forwarded message ----------
> > > Date: Sat, 11 Aug 2007 16:19:43 -0700 (PDT)
> > > From: Yurtle Turtle < yurtle_t@xxxxxxxxx>
> > > To: Tesla list < tesla@xxxxxxxxxx>
> > > Subject: Re: Tesla Coil Firehazards (Exploding paint cans) (fwd)
> > >
> > > As someone who has placed a fair number of aerosol
> > > cans in fires, I'm dubious. Placed in the middle of a
> > > hot fire, a can takes "a while" to blow up. And I'm
> > > talking about a fire with HOT coals.
> > >
> > > However...
> > >
> > > The can's Achilles heel is the valve. It's possible
> > > that the valve could have failed, causing the flamable
> > > spray to be released, then ignited. A quick Google of
> > > "WD 40 flame thrower" or "WD 40 burn" will turn up
> > > lotsa hits.
> > >
> > > However, the odds of a strike causing a valve to fail
> > > on more than one can seems a little high. There's no
> > > way a coil can heat the contents enough to boil.
> > >
> > > Again, I'm dubious, but not quite ready to call him an
> > > outright liar.
> > >
> > > Adam
> > >
> > > --- Tesla list < tesla@xxxxxxxxxx> wrote:
> > >
> > > >
> > > > ---------- Forwarded message ----------
> > > > Date: Sat, 11 Aug 2007 09:32:22 +0800
> > > > From: Peter Terren <pterren@xxxxxxxxxxxx>
> > > > To: Tesla list < tesla@xxxxxxxxxx >
> > > > Subject: Re: Tesla Coil Firehazards (Exploding paint
> > > > cans)
> > > >
> > > > I'll call your bluff on this one and say that you
> > > > made this one up.
> > > > You say you have encountered explosions with paint
> > > > "most often".
> > > > Two reasons I find it hard to believe you.
> > > > A can is almost a full Faraday cage and it is hard
> > > > to imagine how a strike
> > > > could give a spark inside a can. The contents are
> > > > probably not flammable
> > > > themselves (hydrocarbon propellant and paint) until
> > > > mixed with air.
> > > > Striking the outside of a can results in very little
> > > > heat transfer. Try
> > > > heating a full coke can and you will be very
> > > > disappointed.
> > > > So as you started this, please give details of :
> > > > 1 Exactly how many explosions you have had?
> > > > 2 What were your TC details including power?
> > > > 3 Was it just streamers that ignited the cans as you
> > > > say, not direct sparks?
> > > > 4 Did the cans have caps on them?
> > > > 5 Why didn't you stop having the TC strike the cans
> > > > after the first flash
> > > > fire?
> > > > 6 If no-one on this list can reproduce your
> > > > findings and we believe that
> > > > you have lied, what should the group response be?
> > > >
> > > > Peter
> > > > http://tesladownunder.com
> > > >
> > >
> > >
> > >
> > >
> > > for the edge of your seat?
> > > Check out tonight's top picks on Yahoo! TV.
> > > http://tv.yahoo.com/
> > >
> > >
> > >
> > >
> >
>
>
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