HDTenEightyP/NetNews huggingface dataset:
From: jorsch@ccwf.cc.utexas.edu (jordan schwartz)
Subject: Water Injection
Organization: NCR Corporation - Law Department
Date: Wed, 12 Aug 1992 20:47:44 GMT


From jorsch@ccwf.cc.utexas.edu (jordan schwartz)




From jorsch@ccwf.cc.utexas.edu (jordan schwartz)



I just studied the subject of water injection in an engineering thermodynamics
class last spring, so let me now pass on some of my knowledge.

Early turbojet engines, like those found on the B-52 and KC-135, used water 
injection not to increase the mass of the exhaust, but to make the engine more
efficient. Ideal (100% efficient) compression in a jet engine occurs
isothermally,
or when the air passing through the compressor is kept at a constant
temperature.
Since it is impossible to have a 100% efficient compressor, water
injection is a
way to approximate it. Water is injected at each stage of the engine's 
compressor to cool the air down and keep it roughly isothermal. The resulting 
increase in the compressor's efficiency greatly increases the overall
efficiency
of the engine, which translates into more power output and increased
thrust. The
only drawback is that planes can only carry a limited amount of water, so water
injection is typically used only at takeoff on a heavily loaded plane when the
extra power and thrust is desperately needed.

Today's jet engines have advanced to higher stages of efficiency and water 
injection is no longer needed in new engines, but it is still found in
some older
planes.

Jordan Schwartz
jorsch@ccwf.cc.utexas.edu
Mechanical Engineering student
The University of Texas at Austin

Newsgroups: sci.military
From: LJ10717@LMSC5.IS.LMSC.LOCKHEED.COM
Subject: Need Air Show Info/schedule
Organization: Lockheed Missiles & Space Company, Inc.
Date: Wed, 12 Aug 1992 20:47:16 GMT


From LJ10717@LMSC5.IS.LMSC.LOCKHEED.COM




From LJ10717@LMSC5.IS.LMSC.LOCKHEED.COM


Hi MilSci Netters,

I need information on the current schedule for the Blue Angels.  In particular,
the air show taking place at Moffett Field in October.  If anyone has details
relating to this event please post or email to the below address.  Thanks in
advance.

-------------------------------------------------------------------------------
RAT (Rene')- lj10717@lmsc5.is.lmsc.lockheed.com   "Inventor of the gravity-wave
                                                   Amplifier"
-------------------------------------------------------------------------------


Newsgroups: sci.military
From:     "Edward J. Rudnicki" (FSAC-SID) <erudnick@pica.army.mil>
Subject:  Re: Vietnam era ammo sabotage
Organization: NCR Corporation - Law Department
Date: Fri, 21 Aug 1992 13:22:05 GMT


From     "Edward J. Rudnicki" (FSAC-SID) <erudnick@pica.army.mil>


Jean A Boudreaux writes:
#I friend of mine tells me that back in Vietnam, Americans would sometine
#sabotage 7.62x39 mm ammunition.  The method was to take a shell,
#pull the bullet, and replace the powder with a bit of c-4.  The


According to a book on SKS carbines, something similar was apparently
a production item. 7.62x39 cartridges were produced with a PETN filler
instead of normal propellant......ouch :)


Ed Rudnicki     erudnick@pica.army.mil     All disclaimers apply
"It demoralized them. Not to mention killed them."
     --- 3rd AD officer describing effects of DPICM in ODS

Newsgroups: sci.military
From: wwo@vax5.cit.cornell.edu (Thomas Schoene)
Subject: Re: How to spike a gun?
Organization: Cornell University
Date: Wed, 12 Aug 1992 20:38:51 GMT


From wwo@vax5.cit.cornell.edu (Thomas Schoene)


From wwo@vax5.cit.cornell.edu (Thomas Schoene)

In article <BsKCnp.E2s@lawday.DaytonOH.NCR.COM>,
dgfritz@rodan.acs.syr.edu (Doug Fritz) writes: 
> 
> From dgfritz@rodan.acs.syr.edu (Doug Fritz)
> 
> Spiking a gun such as a cannon or artillery piece disables the
> gun, but how does a foot soldier spike a gun?
It is possible to temporarily disable the gun by driving a nail or bayonet into 
the touchhole of the gun.  To do it properly you need special spikes.  One
first rams a ball in under the vent and drive a spike down through the vent
until it bends over on the ball.  To get the gun back into action you have to
drill out the spike and draw the ball (not an easy operation). 
-- 
Tom Schoene
wwo@cornella.cit.cornell.edu  -or- wwo@vax5.cit.cornell.edu
-------------------------------------------------------------------
"Whenever you're holding all the cards why does everyone else turn
out to be playing chess?"

Newsgroups: sci.military
From: ntaib@silver.ucs.indiana.edu (Iskandar Taib)
Subject: Re: depleted uranium
Organization: Indiana University
Date: Wed, 12 Aug 1992 20:43:12 GMT


From ntaib@silver.ucs.indiana.edu (Iskandar Taib)




From ntaib@silver.ucs.indiana.edu (Iskandar Taib)

In article <1992Jul29.130427.22798@lawday.DaytonOH.NCR.COM> billb@is.rice.edu (William Stenson Blackwell) writes:

>However, the real reason 
>it's used, as opposed to osmium or tungsten. is the relative expense 
>of the material.  As its name says, its *depleted*, so according 
>to the government, this is a convenient way of disposing of it. ;-)

Does anyone really use Osmium for ammunition???

I find this strange as it is a Platinum Group Element and 
therefore VERY scarce and expensive. it would be like using
Platinum or Palladium as ammo. 

Tungsten would be quite a bit more common. 

True about the cheapness of DU.. it is a byproduct of the 
nuclear industry.










-- 
-------------------------------------------------------------------------------
Iskandar Taib                          | The only thing worse than Peach ala
Internet: NTAIB@SILVER.UCS.INDIANA.EDU |    Frog is Frog ala Peach
Bitnet:   NTAIB@IUBACS                 !
From: cos!cooper@uunet.UU.NET (Gary Cooper)
Subject: Re: why velcrow insignia
Organization: Corporation for Open Systems
Date: Wed, 12 Aug 1992 20:37:15 GMT


From cos!cooper@uunet.UU.NET (Gary Cooper)


From cos!cooper@uunet.UU.NET (Gary Cooper)

>Why do air force flying uniforms seem to have all insignia 
>attached by velcrow?   Is this a laundry consideration?

So that they may be removed before a mission, depriving the
enemy of any intelligence whatsover from POW's (ahhhhh, so
the 555th is located at THAT airbase!)  Navy and Marine
pilots also use Velcro.  
-- 
Gary Cooper (not the dead one)    personal responses - cooper@cos.com
* * * * * * *  Standard Disclaimers Apply, Of Course * * * * * * * * *
      "The Vice-Presidency is not worth a pitcher of warm spit."
			- Vice-President John Nance Garner - 

Newsgroups: sci.military
From: greg@anacapa.ncel.navy.mil (Gregory K. Ramsey)
Subject: Re: 50 Years Ago: Thursday, 23 July, 1942
Followup-To: sci.military
Organization: Naval Civil Engineering Laboratory, Port Hueneme
Date: Wed, 12 Aug 1992 20:43:40 GMT


From greg@anacapa.ncel.navy.mil (Gregory K. Ramsey)




From greg@anacapa.ncel.navy.mil (Gregory K. Ramsey)


In article <1992Jul23.183510.19098@lawday.DaytonOH.NCR.COM> military@att.att.com (Bill Thacker) writes:
>
>US Secretary of State Hull suggests that an international peace-keeping
>force be formed by the United Nations after the war, and urges neutral
>nations to join the Allies.
>
If I remember my history right, the United Nations did not
come into existence until after WW2.  Was Hull a visionary or was
he just using "United Nations" as a synonom for the Allies?

Greg


Newsgroups: sci.military
From: jrk@tcs.com (John Koper)
Subject: Re: Breaking in green submariners
Organization: Teknekron Communications Systems Inc.
Date: Fri, 21 Aug 1992 13:14:05 GMT


From jrk@tcs.com (John Koper)

In article <Bt8GGI.DrD@lawday.DaytonOH.NCR.COM>, manuelp@ecf.toronto.edu (MANUELPILLAI Gerald Nishanthan) writes:
> Anyone out there who can corroborate or even top this story ? 

I'm not sure if this tops that story but it sure was funny when I heard it:

A chief sent a new submariner searching all the closets in the boat until
he found the practice "water" torpedo used during excercises.  After about an
hour he came back to say that they must have forgotten them back at port.

For those that may be as gullible as the new recruit, a "water" torpedo is
when the torpedo tubes are flooded with seawater so the firing mechanism can
be tested without using an actual torpedo.

-----------------------------------------------------------------------------
John Koper				| jrk@tcs.com
Software Engineer			| 2121 Allston Way, Berkeley, CA 94704
Teknekron Communications Systems, Inc.	| (510) 649-3592

Newsgroups: sci.military
From: Ricardo Tunon <rt20@cunixf.cc.columbia.edu>
Subject: Looking for Information
Organization: NCR Corporation - Law Department
Date: Wed, 12 Aug 1992 20:34:14 GMT


From Ricardo Tunon <rt20@cunixf.cc.columbia.edu>


From Ricardo Tunon <rt20@cunixf.cc.columbia.edu>

Dear Sir:
 
     I am writing to this mailing address in hope that you can answer
some questions for me concerning USENET.

     I am currently looking for information on the following:

United Nations convention on the prevention of the crime of genocide (Genocide
Treaty) 
and the status of the UN's request for a quick response mecanism for
troubled spots.
 
Would also like to know if you have any information on the 6 satalites
that Russia had and are now under UN control. (Satalites with offensive/
deffensive laser technology)
 
                              Thank You,
                               Rick Tunon

Newsgroups: sci.military
From: bakc@giraffe.ru.ac.za (MR KR COMAN)
Subject: Re: Vietnam era ammo sabotage
Organization: Rhodes University, Grahamstown, South Africa
Date: Fri, 14 Aug 1992 18:49:17 GMT


From bakc@giraffe.ru.ac.za (MR KR COMAN)

In article <Bsvn5J.E23@lawday.DaytonOH.NCR.COM> ulowell!usl.edu!jab0684@samsung.com (Boudreaux Jean A) writes:
>From: ulowell!usl.edu!jab0684@samsung.com (Boudreaux Jean A)
>Subject: Vietnam era ammo sabotage
>Date: Tue, 11 Aug 1992 17:52:10 GMT

Ammo sabotage in Vietnam thread.....

This type of "dirty trick" seems to be quite a common effort.  In the Kenya 
Emergency in the early-mid 1950's the Brits did the same with ammo that the 
Mau-Mau were sure to find.   Similarly, in the 1970's Rhodesian bush war.  
In the latter instance Ken Flower's book "Serving Secretly" and Ron Ried-
Daly's book on the Selous Scouts describe additional such booby traps as: 1. 
Planting transistor radios in the stocks held by trading stores likely to be 
patronised by freedom fighters -- one type of radio would detonate when 
tuned in to (say Radio Moscow), and the other would send out a transmission 
when switched on to allow triangulation of the happy foot-tapping listener's 
loc.; 2. not for the really squeamish I guess was the soaking of certain 
items of clothing in contact poison -- once liberated and worn by the freely-
perspiring victim.........    Another popular dodge was to pull the pin on a 
grenade and wedge it under the face-down body of a dead victim of a 
firefight - especially during a cross-border raid into Zambia or 
Mocambique - when his buddies came back to bury him........

The book "Fetch Felix" relates the 'adventures' of the British Army's bomb 
disposal squad in Northern Ireland and lists some IRA booby-traps including 
the "gun on the floor" -- pick it up and set off the bomb under the 
floorboards, etc.

Apparently the German engineers in WW2 were past masters at the "art" of 
boobytraps.  I read of one instance were an attractive villa (I think 
in Italy) was set up whereby a large and attractive oil painting 
hanging in the lounge was tilted out of aligment by about an inch.   
When the villa was requisitioned by senior British officers (as the 
Germans guessed it would be), once they had settled in and were having 
a whisky and soda in the lounge, one of the chaps noticed the picture 
wasn't hanging straight.  He got up and adjusted the picture...KABOOM!  
The logic, of course, was that the ordinary Tommy wouldn't of noticed or 
bothered, but a major or lt-colonel from a good public school 
would.....	

Oh, the ingenuity of mankind in all things.

Cheers,

Keith Coman

Newsgroups: sci.military
From: liats3@cspyr1.cs.adfa.oz.au (LIANG TIAN)
Subject: P90 penetration
Summary: penetration of SS90
Keywords: P90 SS90 penetration kevlar
Organization: Australian Defence Force Academy, Canberra, Australia
Date: Wed, 12 Aug 1992 20:22:58 GMT


From liats3@cspyr1.cs.adfa.oz.au (LIANG TIAN)




From liats3@cspyr1.cs.adfa.oz.au (LIANG TIAN)

  I have a leaflet on FN's Individual Defence Weapon(IDW?), the
P90. It fires a new 5.7*28mm round which FN claims to penetrate 
48 layers of body armour at 150m. I was wondering how this
compares to other common mil round like 5.56, 7.62 and 9mm, i.e.
is 48 layers really impressive?
  Related to this, how many layers do normal body armour
have? I understand that there are many different grades of body
armour, for different roles(CT, bomb-disposal etc). What I am after
is body armour for the normal infantry man.
  Threading the 2 paragraphs together, which mil round can
penetrate normal body armour?

/***********************************************************/
				Liang Tian Soon
				liats3@cspyr1.cs.adfa.oz.au
/***********************************************************/


Newsgroups: sci.military
From: steve@lawday.DaytonOH.NCR.COM (Steve Bridges)
Subject: Sci.military articles re-posted
Organization: NCR Corporation, Corporate Law Department
Date: Wed, 12 Aug 1992 13:57:35 GMT


From steve@lawday.DaytonOH.NCR.COM (Steve Bridges)


Sci.military articles for the week of Aug 3-7 were re-posted on Monday,
August 10.  There were approximately 150 articles posted on 10 August, and
15 articles posted on 11 August.

If you did not get these articles, please let me know.  The articles did
leave NCR to our internet connection (PSI).

Steve
-- 
Steve Bridges, Programmer/Analyst| NCR - Law Department, WHQ-5
steve@lawday.DaytonOH.NCR.COM ___| Phone:(513)-445-4486 622-4486 (VOICEplus)
Reserve sci.military moderator| "The airplane does not recognize attitude,
providing a maneuver is conducted at one G" -- A.M. "Tex" Johnston

Newsgroups: sci.military
From: military@att.att.com (Bill Thacker)
Subject: 50 Years Ago: Wednesday, 12 August, 1942
Followup-To: soc.history
Organization: NCR Corporation - Law Department
Date: Wed, 12 Aug 1992 20:40:46 GMT


From military@att.att.com (Bill Thacker)


From military@att.att.com (Bill Thacker)

Wednesday, 12 August, 1942

Axis attacks against the Pedestal convoy continue.  Three merchant ships, a
destroyer, and a cruiser are sunk; the carrier Illustrious, two cruisers,
and the tanker Ohio are damaged.  The bulk of the escorting force retires
to Gibraltar.

The First Moscow conference begins.  Stalin, Churchill, and representatives
from the United States and Free France attend.  The conference topic is the
opening of a second front in Europe.  Churchill tells Stalin that this is
impossible until 1943, and informs him of Operation Torch.

Henderson Field on Guadalcanal becomes operational, and aircraft begin
landing with supplies for the Marines.

The Soviet attack near Rzhev peaks, but fails to achieve any major
success.

German troops reach Slavyansk in the Kuban, near the Sea of Azov.

Reporter: patter@dasher.cc.bellcore.com (George Patterson)
Source - "Ghosts" calendar for 1992.

--	--	--	--	--	--	--	--	--
Bill Thacker			            military@att.att.com
Send submissions for "50 Years Ago" to military-request@att.att.com

"Milk from Canada is now shipped to Great Britain in empty shell cases...
A large blue "M" on the box indicates that the box contains shells loaded
with milk." - New York Times, "Notes on Science"
Newsgroups: sci.military
From: viking@iastate.edu (Dan Sorenson)
Subject: Re: Vietnam era ammo sabotage
Organization: Iowa State University, Ames IA
Date: Fri, 14 Aug 1992 18:45:41 GMT


From viking@iastate.edu (Dan Sorenson)

>From ulowell!usl.edu!jab0684@samsung.com (Boudreaux Jean A)

>I friend of mine tells me that back in Vietnam, Americans would sometine
>sabotage 7.62x39 mm ammunition.  The method was to take a shell,
>pull the bullet, and replace the powder with a bit of c-4.  The 
>american would then load the 'doctored' shell in a full ammo clip
>and leave it for some unsuspecting charlies to find.  Hopefully
>the primer would detonate the c-4 and neutralize charlie.
>Can anyone confirm or add detail to this method of sabotage.

	A friend, ex-Force Recon marine and who also worked with MAC-SOG
in Vietnam tells the same story.  He also mentions that Charlie learned
fairly quickly and success with this fell soon after being implemented.

>Also, please add any other interesting American booby traps, as I hear
>much of VC ingenuity, but little in terms of US sabotage etc.

	The one story that comes to mind is the taking of prisoners.  I
only heard this, and cannot confirm this in any way, but it is interesting.
Seems there was a Force Recon team out with a mission to capture prisoners.
They did so.  As a matter of fact, they captured more than what they thought
was prudent.  Rather than just kill off the excess, they decided to make
them very thoughful of escape.  Each man had his hands bound and primacord
(fast explosive cord.  A strand wrapped around the Earth, as I remember,
will burn in less time than it takes you to read this sentence.  The shock
wave is good for cutting about anything) wrapped around his neck, with
the entire line of prisoners wrapped together like this.  The prisoners 
were given a demonstration with two wraps of primacord around a 4" diameter
tree, which was cut cleanly in half.  One man ran point, a few on the
flanks, and one man marched behind the wrapped prisoners with a detonator.
My friend called these the most convenient prisoners he had ever had
to move, and also that they were quite willing to march as long as the
team wanted.  Ingenuity depends on what you have at hand.  Various man
traps a la the Boy Scouts were set too in order to slow pursuit.

<Dan Sorenson, DoD #1066 |"There'll be angels on Ariels in leather>
<z1dan@exnet.iastate.edu | and chrome, Ridin' down from heaven    >
<viking@iastate.edu      | just to carry me home." -- R. Thompson >
< ISU thinks I need more education, which they provide for a fee. >




Newsgroups: sci.military
From: viking@iastate.edu (Dan Sorenson)
Subject: Re: Scots Greys at Waterloo
Organization: Iowa State University, Ames IA
Date: Thu, 13 Aug 1992 20:11:48 GMT


From viking@iastate.edu (Dan Sorenson)

In <Bsvn9q.EEE@lawday.DaytonOH.NCR.COM> scw@ollie.SEAS.UCLA.EDU writes:

>Actually what one did was to drive a headless nail into
>the touchhole, until it was flush with the barrel, then the loading
>ramrod was used to bend the spike over, this made extraction VERY
>difficult.  Remember that at this time the majority of field pieces were
>cast from brass.  One would expect that it would take an experienced armourer
>several hours to remove the spike and then rebush the touchhole (a touch
>hole 8-12mm across is not going work very well, in addition it will erode
>very rapidly.

>[mod note -- I thought that brass would have been too soft of a metal to
>cast a cannon out of.  I would have thought they would have used bronze --
>Steve ]

	This is in response to Steve, our beloved moderator.  Brass and
bronze are two alloys, and one can change the behavior of each by mixing
the components in different quantities.  Generally, bronze is the more
brittle but harder of the two, but one can make brass that is every
bit as hard as bronze.  Back when cannon were made of these alloys, the
weaponsmith produced a strong but rather brittle instrument, and either
bronze or brass would work quite well.  Many had their barrels "banded"
with iron bands for extra strength, and protection against a brittle
barrel flexing too much when firing.

	One post mentioned placing a hot piece of metal in the barrel,
thereby letting it weld itself to the barrel.  A friend who served in
the Marines as a Force Recon seargent in Vietnam mentioned two ways
they would neutralize the 105 Howitzers on their firebase when it was
over-run ever month or so.  The first was to drop a thermite grenade
or piece of lit-with-a-Zippo C4 down the barrel to weld the breech.
The second was more involved.  They took a 106mm steel plug and froze
it in an ice bucket next to the gun.  When the time came, it slid
easily down the barrel and upon heating up locked itself in place.
This was enough to destroy the gun the next time it was fired, but
was soon rendered useless as people learned to check the barrel for
obstructions.  While in enemy territory, filling a bullet with C4
in place of the primer rendered an enemy rifle, and the enemy, quite
useless.  Reversing a round in the belt of a belt-fed weapon also
served to jam it up nicely, and if you can nullify a weapon for two
minutes in a firefight then you have effectively spiked that weapon.

<Dan Sorenson, DoD #1066 |"There'll be angels on Ariels in leather>
<z1dan@exnet.iastate.edu | and chrome, Ridin' down from heaven    >
<viking@iastate.edu      | just to carry me home." -- R. Thompson >
< ISU thinks I need more education, which they provide for a fee. >



Newsgroups: sci.military
From: ulowell!usl.edu!jab0684@samsung.com (Boudreaux Jean A)
Subject: Vietnam era ammo sabotage
Organization: Univ. of Southwestern Louisiana
Date: Tue, 11 Aug 1992 17:52:10 GMT


From ulowell!usl.edu!jab0684@samsung.com (Boudreaux Jean A)

I friend of mine tells me that back in Vietnam, Americans would sometine
sabotage 7.62x39 mm ammunition.  The method was to take a shell,
pull the bullet, and replace the powder with a bit of c-4.  The 
american would then load the 'doctored' shell in a full ammo clip
and leave it for some unsuspecting charlies to find.  Hopefully
the primer would detonate the c-4 and neutralize charlie.
Can anyone confirm or add detail to this method of sabotage.
Also, please add any other interesting American booby traps, as I hear
much of VC ingenuity, but little in terms of US sabotage etc.

Thanks

jab0684@usl.edu


Newsgroups: sci.military
From: born@iscsvax.uni.edu
Subject: Good Military Books?
Organization: University of Northern Iowa
Date: Wed, 12 Aug 1992 20:40:17 GMT


From born@iscsvax.uni.edu


From born@iscsvax.uni.edu

I'm teaching four one hour class sessions on U.S. Military History to new
Reserve Officer Training Corps (ROTC) students this fall.  The concentration is on
leadership, valor, and military ethics.  If you had to choose two books to read
on this subject, what would you choose?  I've considered a few but am
interested in some fresh ideas.  Thank you in advance.

                                    Kevin Born, Department of Military Science
                                    University of Northern Iowa

Newsgroups: sci.military
From: rollhaus@oasys.dt.navy.mil (Charles Rollhauser)
Subject: Re: How to spike a gun?
Organization: Carderock Division, NSWC, Bethesda, MD
Date: Wed, 12 Aug 1992 13:53:53 GMT


From rollhaus@oasys.dt.navy.mil (Charles Rollhauser)


In sci.military, dgfritz@rodan.acs.syr.edu (Doug Fritz) writes:
>From dgfritz@rodan.acs.syr.edu (Doug Fritz)
>
>Spiking a gun such as a cannon or artillery piece disables the
>gun, but how does a foot soldier spike a gun?

    Spiking the cannon was a quick and easy way to render the weapon
temporally inoperable.  It simply consisted of driving an object into the
weapon's vent hole, and breaking it off flush with the top of the hole.
Many things could be used to spike a cannon, including actual spikes or
nails.
    Artillerymen kept a pike with  slow match (fuse) burning near the gun
in case there was a malfunction with the flint or friction igniter system.
The pike had a long sharp spike on its end.  This could be used to disable
their own gun if there was a danger of being overrun by the enemy.  A good
armorer could remove the spike (with some work.) The idea was deny the
enemy the use of the weapon in the present battle, and to be able to use
it oneself in the next battle.
    To really destroy a cannon, one blew off a trunnion, or burst the
barrel.  Both procedures took more talent and more time, not to mention
more guts.


Chuck