HDTenEightyP/NetNews huggingface dataset:
From: beck@irzr17.inf.tu-dresden.de (Andre Beck)
Subject: Re: Hearing
Keywords: hearing, deaf
Reply-To: beck@freia.inf.tu-dresden.de
Organization: Dept. of Computer Science, TU Dresden, Germany.
Date: Mon, 21 Dec 1992 18:30:13 GMT


From my own experience:

It may last some days up to a week.
May be you have lost some percent of your Hearing for ever, but (normally)
after some days you won't feel it longer.

I had a lot of "bang traumata" (one every New years day ...) and the biggest
one occured as a pot with Potassium chlorate and red phosphor exploded
in my hand (also removing some quarter-centimeters of skin and, sprinkling
tho whole kitchen with blood stains and totally disrupting the aluminum
pot where the stuff was confined. (I only put a paper ball onto it, so you
know --> NEVER NEVER use this stuff, the books know what they say, at
least with this stuff)

After this traumata, I heared nearly nothing for 2 days and the hearing
came back slowly the following days over... The higher the frequencies,
the later.

BTW, I have no real experiences with the shock waves produced by real
PE's as the NI3x(NH3)n compound (or whatever it is), I only know that
their damage is much bigger, compared from my tests with SMALL amounts
of NI3 and Acetone Peroxide.


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| o |   Andre' Beck (ABPSoft)  mehl: beck@freia.inf.tu-dresden.de  | o |
+-o-+--------------------------------------------------------------+-o-+
From: chr@idefix.escape.de (Christian Moritzen)
Newsgroups: rec.pyrotechnics
Subject: Hi there!
Distribution: world
Date: Sun, 20 Dec 92 22:09:16 GMT
Organization: UP (United Planets)

Hi!

Anyone out there?


			Christian


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  Zu den grossen Reisevergnuegen gehoert es, neue Staedte zu besuchen und
		       neue Leute kennenzulernen.
						    D.Khan
  Christian Moritzen, D-3300 Braunschweig, Bertramstr.3, Tel.: 0531/74218
			chr@idefix.escape.de
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From: miolnir@stein.u.washington.edu (Scot Thorstad)
Newsgroups: rec.pyrotechnics
Subject: Re: Teflon
Date: 4 Jan 1993 02:23:06 GMT
Organization: University of Washington, Seattle
NNTP-Posting-Host: stein.u.washington.edu

In article <1992Dec30.201843.1695@cbnewse.cb.att.com> random@cbnewse.cb.att.com (David L. Pope) writes:
>From article <1992Dec30.200154.146@cas.org>, by jac54@cas.org ():
>> 
>> 	Time to scare you.  Burning Teflon is a dangerous pastime,...
>
>> 	This information was in Armed Forces Journal International
>> 	about two years ago and confirmed for me by a military
>> 	intelligence officer who specialized in chemical warfare.
>
>I don't suppose the journal mentioned the temperatures involved, did
>it? Will overheating a Teflon coated skillet prove dangerous? How
>about Teflon II?
>
>	Random

I believe some fringe lit book mentioned putting teflon scrapings 
in someones cigarette so the temps involved can't be too high.

miolnir


Newsgroups: rec.pyrotechnics
From: ntaib@silver.ucs.indiana.edu (Iskandar Taib)
Subject: Re: munitions plants accidents
Organization: Indiana University
Date: Thu, 24 Dec 1992 17:20:50 GMT

>> My cousin lives near a plant in New Jersey that makes/made dynamite and
>> rocket engines.  One morning the plant went up....

I can think of three but don't have much in the way of facts.

Not too long ago the Hercules plant in New Jersey blew up. Anyone have 
details? It should have gotten a lot of attention in the gun press
since Hercules was a big supplier to the handloading hobby. 

There was also the plant that made Pyrodex blowing up. Killed the Py-
rodex inventor.

Then Hatcher in his Notebook wrote about the huge Picatinny Arsenal 
explosion back in the 30s.




-- 
-------------------------------------------------------------------------------
Iskandar Taib                          | The only thing worse than Peach ala
Internet: NTAIB@SILVER.UCS.INDIANA.EDU |    Frog is Frog ala Peach
Bitnet:   NTAIB@IUBACS                 !
Newsgroups: rec.pyrotechnics
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: How to get Parlon rubber?
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Wed, 23 Dec 1992 07:11:34 GMT

jarmala@pcuf.fi (Ari J{rm{l{) writes:
: Whose trademark is Parlon? Who sells it? For what is it normally used
: except pyrotechnics? Do other chlorinated rubbers do as well as Parlon?

There are many chlorine donars that will work - including PVC and
Saran wrap. How well they work depends on how easy it is to liberate
the chlorine. 

I recall reading an article, fairly recently, comparing the relative
proportions that should be used. I do not recall where - maybe someone
else will remember.

Bill
From: drchambe@tekig5.pen.tek.com (Dennis Chamberlin)
Newsgroups: rec.pyrotechnics
Subject: Re: ringadingding
Date: 21 Dec 92 20:15:21 GMT
Reply-To: drchambe@tekig5.pen.tek.com
Organization: Tektronix, Inc., Beaverton,  OR.

In article <FXc3VB5w165w@tsoft.net> bbs.byron@tsoft.net (Byron Reynolds) writes:
>I was behind an earthen bunker of sorts about 20 feet away, and I was 
>situated in such a way that the danger of being hit with flying debris 
>was not an issue.  However, I did not think about the "bang" enough.
> 
>Well, I got my "bang", and lost my hearing for about 3 days.  It started
>with a shrill "sqeeeeeeeeeeeeeee" sort of sound that began building up
>shortly after the blast, until all I was left with was pure "sqeeee".
> 
Years ago I had considerable experience with 5-inch gunfire. When the gun
was trained out abaft the beam, the distance from the bridge to the muzzle
was perhaps 20-25 feet. The charge in the powder case was about 30 lb of
smokeless, and the muzzle explosion sounded like a big door slamming. 
There was a definite blow you could feel through your clothes. 

In hundreds of rounds, no one ever reported a noticeable hearing loss. 
After reading of this and the problems suffered by an earlier poster
from 1/8 tsp of NHI3, it would seem that the impulse shape has a lot more
to do with hearing effects than the power of the explosion.
From: lc2b+@andrew.cmu.edu (Lawrence Curcio)
Newsgroups: rec.pyrotechnics
Subject: Re: F100 Rocket Engines
Date: 30 Dec 92 06:30:34 GMT
Article-I.D.: andrew.ofEQuem00WB2E3=25a
Organization: Doctoral student, Urban and Public Affairs, Carnegie Mellon, Pittsburgh, PA

The impulse of Class F engines is 40 - 80 Newton seconds. Impulse is
average thrust times burning time, and 100 Newtons comes out to about 22
pounds. The burning time should be between .4 and .8 seconds, and
probably close to .8. The peak thrust is undoubtedly greater in these
engines.

For stories of experience, post to rec.models.rockets.
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: Hearing
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Mon, 21 Dec 1992 17:40:53 GMT

his7@cunixb.cc.columbia.edu (Henry Shih) writes:

: Hello fellow pyros,
: 	I've been fooling around with the ammonium tri-iodide compound lat night and one went off unexpectedly about 1 foot in front of my face.  It was only one single crystal.  I immediately got the ringing in the year and I thought it wasn't that serious.  I was hoping that a night of sleep might get rid of it.  Now I can't hear everything in my left ear.  My left year is not completely deaf, I still can hear very little of it.  Did anyone have a similar type of accident or problem?  I'm hoping that this hea



ri
: ng problem isn't permanent and will heal in a few days.  Maybe this is wishful thinking.  If anyone out there also had an explosion occur near their ear and their hearing was not impared, how long did it take for the ringing in the ear to wear off?  

I suggest that you check with a hearing specialist - just to play it safe.
Your hearing is not worth risking any further - just to save a few dollars.

In the future, I would suggest:

1) Wear hearing protectors when working with explosive mixtures.

2) Keep pyrotechnic materials away from the body. 

Bill
Newsgroups: rec.pyrotechnics
From: etljmme@etlxd30.ericsson.se (Jim)
Subject: Re: Triggering systems.
 
Reply-To: etljmme@etlxd30.ericsson.se
Organization: Ericsson Telecom AB
Date: Wed, 23 Dec 1992 13:40:37 GMT

In article 6B66VB5w165w@cyberden.sf.ca.us, rdicker@cyberden.sf.ca.us () writes:
>I mabye didn't make myself clear enough in my request for a triggering 
>system.  A: I know what a solar igniter is, thank you very much!  B: I 
>know what slow burn fuse is, thank you very much!  C: I want a REMOTE 
>CONTROL (RADIO) PRE-MADE triggering system!  OR a PRE-MADE TIMER 
>(DIGITAL) triggering system.  If I get another response about slow burn 
>fuse or long stereo wire I'm going to puke!  Thank you very much.

:-)  I can't resist it...

Have you considered using slow burn fuse or long stereo wire?  A slow burn
fuse is a fuse which has a slow burn.  Or more precisely, a fuse which burns
*slowly*.  This fuse, which is slow-burning, can be used to for a fuse which
has to have slowish burning as a characteristic.  Being a slow burner, this
fuse allows you to run the fuck away before your cardboard assembly of
match-heads and long stereo wire farts into the wind with a miserable puff
of smoke. fsst.
Newsgroups: rec.pyrotechnics
From: pierson@empror.enet.dec.com (dave pierson)
Newsgroups: rec.pyrotechnics
Subject: Re: Teflon
Date: 31 Dec 92 01:18:25 GMT
Organization: Digital Equipment Corporation

In article <1992Dec30.201843.1695@cbnewse.cb.att.com>,
random@cbnewse.cb.att.com (David L. Pope) writes...
>From article <1992Dec30.200154.146@cas.org>, by jac54@cas.org ():
>> 
>> 	Time to scare you.  Burning Teflon is a dangerous pastime,...
> 
>> 	This information was in Armed Forces Journal International
>> 	about two years ago and confirmed for me by a military
>> 	intelligence officer who specialized in chemical warfare.
> 
>I don't suppose the journal mentioned the temperatures involved, did
>it? Will overheating a Teflon coated skillet prove dangerous? How
>about Teflon II?

	I don't have the tempeatures handy, but its HOT HOT.  This was surfaced
	some years back, after everyone started using teflon coated cookware.

	Effectively the only way to do it was to melt the pan.  That is, as long
	as anything was in it, to limit the temps, the Teflon stayed below the
	decomposition point.

	If a pan was allowed to boil "dry" (dry of either water or "grease",
	then there is risk.  (I have seen a an aluminum (no teflon) teakettle
	melted on an electric stove...)

	For pyro work, so long as the combustion took place "up there", as
	opposed to ground effects, or (especially) indoor fireworks, the risk
	would be minimal.

thanks
dave pierson			|the facts, as accurately as i can manage,
Digital Equipment Corporation	|the opinions, my own.
40 Old Bolton Rd		|I am the NRA.
Stow, Mass, USA	
01775				pierson@msd26.enet.dec.com
"He has read everything, and, to his credit, written nothing."  A J Raffles
From: mikeg@asylum.tmc.edu (Michael Grabenstein)
Newsgroups: rec.pyrotechnics
Subject: Re: rec.pyrotechnics FAQ
Date: 23 Dec 92 17:21:35 GMT
Organization: NASA Goddard Space Flight Center


	Is there a FAQ that exists that equates the chemical names
to household names?
(ie. Sodium iodine == Table salt)
Thanks,
	Mike
	mikeg@asylum.gsfc.nasa.gov
=-=-=-=-====-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=
Std. Disclaimers...
Def. Universe -- The largest known Fractal.
			--Personal Theory

Froehliche Weihnachten und ein glueckliches neues Jahr!
Newsgroups: rec.pyrotechnics
From: ntaib@silver.ucs.indiana.edu (Iskandar Taib)
Subject: Re: Jello Bombs, How to air burst?
Organization: Indiana University
Distribution: na
Date: Thu, 24 Dec 1992 17:56:02 GMT

In article <623@thunder.LakeheadU.Ca> padecoo@flash.LakeheadU.Ca writes:
>
>     Ok...so you all think that hitting a human target with high velocity 
>gelatin products is a bad idea.  I agree.  But the point is how do I get the
>thing to air burst?
>
>     Even if the distributed jello hit someone (which it won't) its mass and inertia will not be great enough to cause physical harm!  
>
>     I have some rotten bean sprouts in my refrigerator.  You know they turn orange if you leave them there long enough.  I might incorperate them into the nestdesign.
>
>     BUT, the whole point is how do I detonate it reliably???
>
>     I really like seeing a parking lot covered in white snow, and big red
>streaks of jello!!!!!  Help me to attain my dream!!! <grin>

Why not hit it with a baseball bat?

Even better: tie a string onto the neck that is perhaps 10 feet shorter 
than the distance to the ground. This should cause the balloon to shred
about four feet above Murgo's head. Even better, use a circular plywood 
disk under the balloon and a string bag attached to the string. The jello 
gets strained through the bag and gets splaterred sideways by the disk.


-- 
-------------------------------------------------------------------------------
Iskandar Taib                          | The only thing worse than Peach ala
Internet: NTAIB@SILVER.UCS.INDIANA.EDU |    Frog is Frog ala Peach
Bitnet:   NTAIB@IUBACS                 !
Newsgroups: rec.pyrotechnics
From: gbloom@nyx.cs.du.edu (Gregory Bloom)
Subject: micron-sized oxidant
X-Disclaimer: Nyx is a public access Unix system run by the University
	of Denver for the Denver community.  The University has neither
	control over nor responsibility for the opinions of users.
Organization: Nyx, Public Access Unix at U. of Denver Math/CS dept.
Distribution: rec
Date: Sun, 27 Dec 92 01:43:29 GMT


I was walking through our local warehouse mega-store the other day
when I spotted one of those piezo-electric humidifiers cheerfully
spewing a very fine mist, which totally evaporated after about
4 inches of passage through the air.  It occurred to me that this 
should be a very useful method of creating extremely fine powders
of soluble salts.  By simply varying the concentration, you should
be able to achieve arbitrarily fine powders, perhaps sub-micron.

Has anyone thought of this?  Do you think it would work?

Gregory Bloom
gbloom@nyx.cs.du.edu
From: dheisler@CERIS.Purdue.EDU (Dave Heisler)
Subject: Re: ringadingding
Organization: Center for Environmental and Regulatory Information Systems, Purdue University
Date: Mon, 21 Dec 1992 21:12:20 GMT

you know that plastic packaging material with the little bubbles?

believe it or not, if you pop one of those bubbles with your
fingers more than about 10 inches away from your ears it's
painful.

probably not permanent, but painful.

dave
Newsgroups: rec.pyrotechnics
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: KNO3 + sugar = rocket fuel?
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Sat, 26 Dec 1992 11:29:07 GMT

david@zrz.tu-berlin.de (David Siegel) writes:
: Hi
: 
: In my first homemade rocket engine I have used a mixture of
:    KClO3 + sugar (1:1)
: and it worked. But it burns too quick. Now I want to try
:    KNO3 + sugar  (?:?)
: but I have never read something about that mixture. Have you got any
: experience with it?

I have never used it. You can increase the amount of sugar to decrease
the burning rate.

Shimizu gives the following composition:

KNO3  59-64%
Charcoal 20-31%
sulfur  8-13%
Black Powder  0-12%

As you can see - you have to experiment until you get the right mixture.
The composition will vary - depending on quite a few variables - such as
rocket size, nozzle size, how fine the components are ground etc.

Bill
Newsgroups: rec.skydiving
From: "philip jones" <philip.jones@canrem.com>
Subject: f a q (instructor ai
Reply-To: "philip jones" <philip.jones@canrem.com>
Organization: Canada Remote Systems
Distribution: rec
Date: 22 Dec 92 05:30:51 EST

BB>   Don't most S/L DZ's use a hanging exit?

NOPE.  Did my first S/L jump here in Canada 6 years ago doing a poised.

BB>We do -- usually people fall when they are trying to swing off of the
BB>step. What I hate is the ones who start handing before they get past
BB>the end of the step, and WHACK their arm on the step when they DO let
BB>go.

Maybe the hanging exit would of helped the first jump student at my DZ who 
lost his two front teeth on the step of a C182.  The first jump here is a 
level 1 AFF jump with 2 instructors, this guy didn't PUSH at all with his 
arms he just hopped off the step and went straight down onto it.  He was 
quite a mess when he landed, looked much worse than it was.

BB>Hanging exits seems less prone to "new student error" than poised exit

I agree totally. (see above)

Hope all you jumpers in OZ are having a great summer, just too much snow 
and too damn cold here!!! (whimper, whine etc.)

Phil
B2964



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World's Largest PCBOARD System - 416-629-7000/629-7044
Newsgroups: rec.skydiving
From: "philip jones" <philip.jones@canrem.com>
Subject: skydiving, what else?
Reply-To: "philip jones" <philip.jones@canrem.com>
Organization: Canada Remote Systems
Distribution: rec
Date: 25 Dec 92 01:52:42 EST

To: kevin.taylor@Canada.Sun.com

Hey Kevin what have you been up to or are you in Z-Hills right now?  I 
figure you probably are.  I couldn't afford it this year, Quincy kinda 
tapped me out. 

I still owe you for that reserve repack you did for me.  Remember my 
intentional??!!  Yeah way back in August, that was the last time I 
jumped!!

Well just thought I'd drop you a note.  It'll probably be 1993 by the time 
you get back to work and read this, so I hope you had a great holiday 
season (It was probably nice and warm in FLA!)

Phil 

--- WinQwk 2.0 #0
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Canada Remote Systems  - Toronto, Ontario
World's Largest PCBOARD System - 416-629-7000/629-7044
From: vannevar@panix.com (Vannevar Yu)
Newsgroups: rec.skydiving
Subject: Re: Skydive City distance from Tampa
Date: 21 Dec 92 23:00:06 GMT
Organization: Panix, NYC

In rec.skydiving you write:

>How far is Sky Dive City from Tampa??
>I'll be down that way for the rest of the year and would like
>to do some jumping (if I can get away from the family).  Are they
>open during the week??  Thanks in advance for all info!!
>-Mirk  A14944
>------------------------------
>Andy Mirkis
>Bell Communications Research
>Piscataway, New Jersy
>------------------------------

I wish I was there!  Skydive City (and Zephyrhills Parachute Center) are
the two full-serve 7-days-a-week nice-jumpcraft drop zones located at the
Zephyrhills Airport, a very *easy* drive east of Tampa.  I called SD City up
two weeks ago on a Thursday, at around 3:30 PM and they were at load 13!  And
that was a relatively slow day in the week!
I'm very familiar with Skydive City since I did my AFF + and A stuff over
there.  The Freeflight School (located on drop zone) had great 
instructors and I definitely will be back to do RW training with them and go
for my wet training and 'B' license.  I leave from Newark Int'l on January 8...

Skydive City   813-783-9399
40247 Tucker Rd., Zephyrhills, FL  33539-1599
Talk to manifest or organizer-meister Jerry Bird
$15 to 13,500', collect 15 stubs and get free jump from Freefall Express
2 full-time twin otters, porter on call, DC-3 if there's an 'event'

Freeflight    813-783-9991
Located at Skydive City drop zone
Talk to owner *and* AFF JM/I *and* ST&A Frank Arenas
Freeflight has rental gear, and TANDEM/AFF/RW instuctors (if you plan to do
one-on-one instruction): Jeff "Barbone" Barbani, Dino Porcus, Mike Bergerson.

If you call them, they can FAX you a very descriptive MAP of the area.  By
far, this is the best DZ I've ever been to. As far as proximity to Tampa is
concerned, I always fly to Tampa to get to Skydive City (rather than Orlando).

GO FOR IT !!!!

Vannevar
-- 
* #include<std_disclaimer.h>    /* Life is short, and then you bounce. */ *
* Vannevar Yu * is at vannevar@panix.com or {uupsi,cmcl2}!panix!vannevar  *
* SnailMail: 50 West 34th St. # 19-B8, New York, NY  10001-3091           *
From: pvf@alantec.com (Paul Fries)
Newsgroups: rec.skydiving
Subject: Re: s
Date: 22 Dec 92 22:27:23 GMT

boucher@hpcc01.corp.hp.com (Richard A Boucher Jr) writes:

> Somebody mentioned that Tom Piras didn't activate his
> CYPRES because of fear that it would deploy while
> floating.
>
> Does anyone know of a documented instance of a CYPRES doing
> this?  FXCs, sure, but CYPRESs?
>
> I thought I remembered reading somewhere recently that no
> such problems have been encountered by CYPRES users...

How does ANY device get fooled into thinking you are low enough
to need an AAD to fire?

What I mean is, I can understand that an AAD might think you are
in freefall (maybe) while you are floating, what with the slip
stream and/or prop wash causing weird low pressure around you.

But the altitude sensing section of the AAD would be looking for
a higher pressure, wouldn't it.  So I wonder how that section
could be fooled into thinking you are many thousands of feet
lower than your actual altitude.

Now, I am not saying I don't believe it can happen.  I am just
wondering HOW it happens.

As for a CYPRES being fooled this way...

I thought that a major "feature" of the CYPRES was that it would
reject obviously eroneous data.

That is, I can believe that a pressure sensor might get fooled
into thinking that your speed is high or that your altitude is
low, but the conditions under which these sorts of things would
happen are transitory.  For instance, it just isn't possible for
you to be at 12000 feet one second but 800 the next, so the
CYPRES would reject that as a firing situation.  Likewise, you
cannot be at 30 mph one second and 120 the next, so again, the
data MUST be suspect, and should not be trusted.

Anyway, I thought that the CYPRES required that the data be
realistic before it would fire.

So, can anybody out there give us an accurate description of
the processing the the CYPRES uses?

Paul Fries
pvf@alantec.com
From: mffowler@zeus.calpoly.edu (Michael Francis Fowler)
Newsgroups: rec.skydiving
Subject: Sky snowboarding
Date: 4 Jan 93 02:15:52 GMT
Organization: California Polytechnic State University, San Luis Obispo

Anyone hear anything about famed, Bruno Gruvo (spelling?), the sky
snowboarder?  I have never tried it, but want to.  I am curious about
what I will have to do to skydive?  Go through a class?  Or just like
bungy jumping and just jump- out of a plane,though?  There is an outfit close
buy in Paso Robles, CA.  Anybody hear of it?  What would the first jump
be like?  Would I have to have my cord pulled or could I do it myself?
Thanks for the time.  Have fun SKYDIVING!!!      

                                              mffowler@nike.calpoly.edu