HDTenEightyP/NetNews huggingface dataset:
From: dparsons@ache.mad.adelaide.edu.au (David Parsons)
Newsgroups: rec.skydiving
Subject: Re: sinus pressure
Date: 15 Sep 92 12:42:13 GMT
Organization: University of Adelaide, South Australia
NNTP-Posting-Host: ache.mad.adelaide.edu.au

In article <1992Sep14.163316.15822@mercury.cair.du.edu> tjreynol@zephyr.cair.du.edu (The Jumpin Dude) writes:
>last thursday i got something of a cold, and was pretty congested
>on saturday when i went jumpin; my first freefall was pure agony

>seems to have. i took some decongestant stuff (suphedrine?)
>and things were fine after that. then sunday, i took more pills

> but i started spitting a bit of blood
>and on my third jump, i had blood running up my goggles :-(
>
>this ever happened to anyone else?
>
>tim, still bloody nosed
Having read a few of the followup postings on this, a word of caution on
jumping with sinus (and maybe, more importantly, nasal congectsion).
There is lost of evidence from SCUBA diving circles that if you go having fun
when there are large pressure changes (like diving, or skydiving) AND you have
some nasal congestion  (like cold, etc) then you can expect your ears / sinuses
to hurt a bit / a little / a lot.
While decongestants like sudafed can help, they aren't perfect, and you may d
find that yopu still have enough congestion to have pain.  There remains a risk
of mild to serious middle ear or inner ear damage if you can't deal with the
pain / pressure changes... i.e. you can't relieve it with swallowing, wiggling
your jaw, starting yawns (your ears should 'pop' when you do that, but it need
to be a pretty boring dive to be abvle to yawn), and as someone mentioned doing
the 'valsalva' maneouvre... not a new dance step, but a way to more vigorously
help to equlaise pressures in your head.  MAJOR CAUTION here with valsalva:
ONLY DO IT VERY GENTLY.... cause if you do it too hard there is the reasonable
chance of rupturing the round / opval windows of the inner ear.  Unlike a
ruptured outer eardrun which usually heals , ruptured inner ear  windows most
often cause irreversible sensorineural hearing loss (damage to the nerve cells
that actaully turn sound into nerve impulses).
Generally thought that the indicator of this type of inner ear dammage is n
ringing in the ear(s).
If you notice this particular symptom after ear / sinus problems during pressure
changes, get yo ass to the best ENT specialist you can find(particularly one a
that has experience in SCUBA diving hearing injuries, where this is much more
common).  Some of this is partially reversible if dealt with early enough.
BTW, If you need to know how the VALSALVA maneovre works, check out a quality
SCUBA text or speak to an experienced SCUBA diver.  Main thing is: do it
gently!
Also, it's most effective for pressure equalisation <on the way down> (diving OR
skydiving).  On the way up the expanding gases inside your ear <should> 'blow
off' fairly easily.  If not... trun on jump run and get out.  Hearing loss is
not worth an extra few thousand feet.
Newsgroups: rec.skydiving
From: mark@virtech.uucp (Mark Smith)
Subject: Re: Ithaca Skydiving
Reply-To: mark@vti.com
Organization: Virtual Technologies, Inc.
X-Newsreader: Tin 1.1 PL5
Date: Wed, 9 Sep 1992 18:32:28 GMT

Eric Jaquith (jaquith@cs.cornell.edu) wrote:
: Off the subject:  Is skydiving a seasonal sport?  (Can I dive in the
: COLD winter months here, etc.?)

I don't think that I could live the entire winter w/o jumping, but
I do take precautions.

You can catch frost-bite in less than 20 seconds in the wierdest
places (such as the inside of your nose).  Cover up all your bare
skin.  I practice the feel of pulling and chopping with winter
gloves on.

I know from empirical evidence that short ff's are far less harsh
on your body than long canopy rides.  Do not attempt CRW from 12k
on a cold day!

Interestingly enough though, it is sometimes warmer up top than
it is on the ground.  I've actually watched the thermometer go
*up* as we gained altitude.

I think as skydivers get older they tend to give up winter jumping.
I find it hard to get someone stupid enough, erh, uhm, gutsy enough
to jump with me in the winter.
-- 
      /_\   Virtual                  Mark Smith          USPA D-13761
    /-~_  \    Technologies          mark@vti.com
  /      ~-_\     Incorporated       703-430-9247,   FAX 703-450-4560
/_____________\      46030 Manekin Plaza, Suite 160, Dulles, VA 20166
From: shibuya@mailhost.bl.cad.slb.com (Hiroto Shibuya)
Newsgroups: rec.skydiving
Subject: Re: Looking for pictures of formations
Date: 9 Sep 92 19:46:37 GMT
Reply-To: shibuya@mailhost.bl.cad.slb.com
Organization: Schlumberger Technologies CAD/CAM Division

In article fbm@ptcburp.ptcbu.oz.au (Farrell McKay) writes:

>   Hmmmm .... thinking a bit more about this .... simple black and
>   white images would be a good way of sharing ideas about good
>   formations/jumps to do.  Or even to see what the shape of the
>   latest 225-way blob was like.  Or even .... sorry, just thinking
>   out loud here.

I want to go even further.  I want to have electric representation of
sequetial RW which contains all the essential abstraction which define
a whole skydive, including all the grips, angles, transition between
points, targetings, keys.  I want to have a dive editor where I can
electronically engineer a dive and animate it.  Further, calculate all
the translational and rotational motions/accelerations of the
transitions and generate optimum dive plan.  Oh also I like to have 3D
human figures and all the possible jump plane door model for exit
engineering....  (Could anybody tell me exact dimension of King Air
door?)






--
				Hiroto Shibuya
			
				Schlumberger Technologies 
				CAD/CAM Division
From: kcameron@erc.cat.syr.edu (Ken Cameron)
Subject: Re: You may pick up your pencils...
Organization: Electronic Resource Center, Syracuse
Date: Sat, 5 Sep 92 10:34:08 EDT

In article <4190012@hpcc01.corp.hp.com> boucher@hpcc01.corp.hp.com (Richard A Boucher Jr) writes:
>All this talk about reserve rides and a couple of recent dreams about 
>malfunctions have got me to wondering...
>Statement: One cannot fully define one's commitment to or relationship with 
>the sport of skydiving until one's first reserve ride.
> 1. True or False?
> 2. Explain your answer.
>-RB
I feel that the better test of your commitment is not your first reserve
ride, but it is significant. The real test is after someone you know very
closely goes in. When a friend has died in the sport it does make most of
the folks think about their true reasons for skydiving. Those that under-
stand their own reasons and that of their lost friend will see the
commitment quite clearly. And for those wondering very few people decide
to stop for that reason.


-- 
-ken cameron. SkyDiver: Zoo-602, A-8596, D-11839. Skier.
Employer: Computer Task Group.  /cny UNIX Users Group Director.
Disclamer: "I said it, when I said it, so what! Now is different!"
Internet: kcameron@erc.cat.syr.edu
Newsgroups: rec.skydiving
From: tjreynol@zephyr.cair.du.edu (The Jumpin Dude)
Subject: Re: HELP: Things to consider when buying a hand altimeter?
Organization: University of Denver
Date: Fri, 11 Sep 92 17:28:25 GMT

In article <1992Sep11.153627.27363@Rapnet.Sanders.Lockheed.Com> traurig@ncavax.decnet.lockheed.com writes:
>option for those for which it is viable.  Another interesting permanent
>mounting place I have seen a few times is on or near the where the main lift
>web meets the lateral; I guess you'd call it a "hip mount" :-)

i know  a guy that wears one there; says it's great for tracking; i don't
see why he doesn't put it on his chest so everyone else can see it easily
too. maybe he doesn't want to break his teeth...

my chest mount is just fine for me. i wore Jan's hand mount and forgot 
it was even there :-) the only time i thought to look at it was when 
i was getting so much lift in a track that i thought my altimeter was
stuck at 4,000;

>
>	Does anyone have any others they've seen?  No joke positions allowed,

i've seen smaccuracy and CRW types strap 'em on their thigh.

>to be in regular use by at 1 person.  Personally, I always wanted a miniature
>-in-the-goggle readout, but I love electronic toys, although I haven't
>purchased a digital altimeter yet.

i've always thought it would be trick to have one project onto the inside
of your goggles.

does anyone know what  Blind Dave (i think it's Dave) uses? maybe an 
assortment of Para-Lerts and Dytters?

>Scott (traurig@ncavax.decnet.lockheed.com)
>D-13279

tim
Newsgroups: rec.skydiving
From: laubach@hpl.hp.com (Mark Laubach)
Subject: Re: Yumping in France
Date: Mon, 14 Sep 1992 20:14:50 GMT
Organization: Hewlett-Packard Laboratories Palo Alto,CA
X-Newsreader: Tin 1.1scd1 PL4

Oops, sorry for the omission, I will be between Lyon and Grenoble from October 14th
through 18th.

--
Mark

Newsgroups: rec.skydiving
From: tjreynol@zephyr.cair.du.edu (The Jumpin Dude)
Subject: Re: Spotting and Ground Speed
Organization: University of Denver
Date: Fri, 11 Sep 92 02:11:41 GMT

In article <16911@ucdavis.ucdavis.edu> bonitz@ebony.eecs.ucdavis.edu (Bob Bonitz) writes:
>
>The only relevant factor, I repeat "only," 
>is your ground speed.  Let's move on folks!

wait wait!
i want to say THANKS to whoever brought this up, and whoever set it straight
(Art and the Norse fellow, as i recall)

i was in agreement with Jan... noone ever brought groundspeed up
when i was taught to spot. not that i remember, anyway.
luckily (tho it pissed me off) i've hardly been truste to spot.
till last weekend (bwahahaha)

think i'll write a song called 'I've got the Newbie Blues'

BTW, Art, i read a couple of Jumpin newsletters up in LP, and i know one
of them had an article by you, and another by another netter, Jerry or 
Doug I want to say, I think it was Jerry's separation article, anyway
there was a fellow from Boeing collecting e-mail addresses, and thought it 
would be appropriate to add all of us to his list, or get all the Boeing
folks (he mentioned that there were quite a few Boeing Jumpers (I wouldn't
want to b a Boing Jumper!) and yet they sure don't seem to be here...
anyway, could you maybe post his addrtess, if you know what i'm talking about?

also, i'm guessing that your newsletter wasn't the one that was roughly the 
size of the Chuting Star, but one of them was, and had an article about
twin Beeches that i meant to bring home. anybody have a copy of that that 
i might talk you out of?

heeehahahahah   it's almost Jumpin TIME! I CAN HARDLY WAIT


FLY INCREDIBLY!!!!
PARTY HARDILY!!!!!
WHO NEEDS MONEY ANYWAY????

HAHAHAHAAAA
tim
From: bonitz@ebony.eecs.ucdavis.edu (Bob Bonitz)
Newsgroups: rec.skydiving
Subject: Re: HELP: Things to consider when buying a hand altimeter?
Date: 11 Sep 92 20:36:03 GMT
Organization: UC Davis  Robotics Research Lab

In article <1992Sep11.153627.27363@Rapnet.Sanders.Lockheed.Com> traurig@ncavax.decnet.lockheed.com writes:
}
}These are all of the altimeter mounting positions I've seen in regular use:
}
}			Chest
}			Mud Flap
}			Wrist/Hand
}			Hip
}			None!
}
}Does anyone have any others they've seen?  No joke positions allowed, it has
}to be in regular use by at 1 person.

I know of at least one jumper who wore his altimeter on the front of his
helmet so others could see it even though he couldn't.  I don't know if he
still wears it there as I haven't seen him in years.  So add "Forehead" to
your list.
From: SKYDIVE@f15.n233.z1.fidonet.org (SKYDIVE)
Newsgroups: rec.skydiving
Subject: Bounce Back
Date: 13 Sep 92 01:35:36 GMT

Reply-to: Bill.Caefer@p0.f853.n102.z1.fidonet.org (Bill Caefer)
Fido-To: all

Well, it's almost time for the Boogie in Eloy, AZ.  Two jumps for the price of one.

Anyone else going to be there?

Bill Caefer
D-7510


--- Maximus 2.01wb
--- eecp 1.45 LM2 

 * Origin: <X> Infinity Ltd.  HST/DS (1:102/853)
--  
SKYDIVE - via FidoNet node 1:233/13
internet: SKYDIVE@f15.n233.z1.FIDONET.ORG
-- Check Source BBS, (217) 244-6954, HST, V.32, V.42bis ---
Newsgroups: rec.skydiving
From: wain@decoy.uucp (25498-greenhalgh)
Subject: Plane Crash at Hinckley IL
Organization: Bellcore, Livingston, NJ
Distribution: usa
Date: Mon, 7 Sep 92 23:34:03 GMT

I just heard on CNN about a sky diving plan crash at Hinckley IL
Has anybody out there got any details.

H. Wain Greenhalgh
wain@decoy.cc.bellcore.com
BELLCORE
Piscataway, NJ
From: SKYDIVE@f15.n233.z1.fidonet.org (SKYDIVE)
Newsgroups: rec.skydiving
Subject: Re: 11-Cell Canopy Question
Date: 4 Sep 92 22:09:44 GMT

Reply-to: Bill.Caefer@p0.f853.n102.z1.fidonet.org (Bill Caefer)
Fido-To: romulus!acad3.alaska.edu!fsjfz

 r> Does anyone in this group maintain an (inter)national 
 r> list of clubs or other
 r> organizations that regularly sponsor jumps?

What exactly do you mean by "sponsor?"  If you mean paid/free jumps as in demos etc., ask around your local DZ.  These are the guys doing them.

This could be enlightening though.

--- Maximus 2.01wb
--- eecp 1.45 LM2 

 * Origin: <X> Infinity Ltd.  HST/DS (1:102/853)
--  
SKYDIVE - via FidoNet node 1:233/13
internet: SKYDIVE@f15.n233.z1.FIDONET.ORG
-- Check Source BBS, (217) 244-6954, HST, V.32, V.42bis ---
From: jaquith@cs.cornell.edu (Eric Jaquith)
Newsgroups: rec.skydiving
Subject: Ithaca Skydiving
Date: 8 Sep 92 17:59:38 GMT
Organization: Cornell University, CS Dept., Ithaca, NY

I'm looking for a location for first-time skydiving (AFF) in the area.
Ithaca is about 1 hour south from Syracuse, 3 hours west of Albany.

I called Finger Lakes Skydiving, but they only had Tandem and Static
line.

Off the subject:  Is skydiving a seasonal sport?  (Can I dive in the
COLD winter months here, etc.?)

-JQ
jaquith@cs.cornell.edu
From: bonitz@ebony.eecs.ucdavis.edu (Bob Bonitz)
Newsgroups: rec.skydiving
Subject: Re: Spotting and Ground Speed
Date: 10 Sep 92 23:32:43 GMT
Organization: UC Davis  Robotics Research Lab

In article <1992Sep10.173740.19081@ctr.columbia.edu> joe@avs.com (Joe Peterson) writes:
}
}Ok, here I go out on a limb...
}
}[stuff deleted]
}
}The reason ground speed seems relevent is because the lower the ground
}speed, the higher the winds aloft, and the higher (most likely) the
}difference in wind speed at different altitudes.  Approaching the ground
}(and hitting lower wind speeds) is transitioning from one frame of
}reference (the "still air") to another (the moving ground).  This
}gradual transition throws off that "good" separation up high.
}
}Make sense?  Or did my limb break?

Makes no sense.  Your limb broke.  The only relevant factor, I repeat "only," 
is your ground speed.  Let's move on folks!
Newsgroups: rec.skydiving
From: jmills@cass.ma02.bull.com (John Luke Mills)
Subject: Canopy Reaction To Wind (Was Re: Airspeed vs Groundspeed)
Organization: Bull World Wide Information Systems Inc.
Date: Mon, 14 Sep 1992 21:52:16 GMT

Bill.Caefer writes

>The only word for that is: Nonsense.  A canopy can not and does not
>ever  feel anything but forward wind.  Think about it.

I have thought about and felt it a lot.  In a completely steady wind
this is quite true.   In the situation were there is a sudden gust of
wind from the side,  the canopy will accordion.  Early canopies would
sometimes even collapse.  This  is one of the reasons that cross-ports
-- 




Newsgroups: rec.skydiving
From: allen@iat.holonet.net (Allen Erickson)
Subject: Re: you aren't going to believe this...
Organization: HoloNet (BBS: 510-704-1058)
Date: Tue, 8 Sep 1992 06:20:59 GMT

: >: -  The student who cut-away because he couldn't pump the slider up.
: >: He flared the canopy twice as he was taught but the slider stayed
: >: down, so he used his emergencies procedures.  He did everything by the
: >: book, except for one misunderstanding.
: >
: >That happened at Skydance, was that the incident you heard about,
: 
: No no it happened here.  In Australia.  At Wilton.  Thats about 12000km
: or so from Skydance.  I was the TCO and was the first to talk to him
: after he landed so I know it happened here.
: 
: >or is
: >that one repeatable?
: 
: Well it seems so.  Are you sure you didn't hear about ours and somehow
: the story got transferred to Skydance.  I can imagine a lot of student
: misconceptions repeating themselves at different dropzones.  But I
: thought this one was a once off.
: 
: 
: Bob V!

No, I was on staff at Skydance, and the guy who did it explained what he
had done when his JM and I (both of us landed near him) reached him after
he landed.  Maybe this is becoming epidemic! (g).

Allen
-- 
Allen Erickson
From: MORET@eldi.epfl.ch (SkyDive!)
Newsgroups: rec.skydiving
Subject: RW competitors
Date: 10 Sep 92 07:31:19 GMT
Organization: Ecole Polytechnique Federale de Lausanne, Dpt d'informatique
X-News-Reader: VMS NEWS 1.22


Hello !

Are some RW competitors on the net ?  I'm part of an 8-way team and it would
be nice to hear a little about competitions (results, techniques...). Is
there some interest for those things or not ?

Blue skies and lot of points...


--Pierre      moret@di.epfl.ch
From: dsouth@uoft02.utoledo.edu (Dale Southard Jr.)
Newsgroups: rec.skydiving
Subject: Airspeed vs Groundspeed
Date: 9 Sep 92 11:30:39 EST
Organization: University of Toledo, Computer Services


All this talk of ground speed and airspeed brings up a point I was
discussing with an intermediate jumper this weekend.

Canopy AIRSPEED is the same wether you are facing in an upwind, downwind
or crosswind direction.  The only thing that changes is the GROUNDSPEED.

I realize how obvious that statement is (generally, it is covered in most
first jump courses), but I cannot count the number of times that I have
overheard a jumpmaster/instructor telling others to turn into the wind
to help inflate closed endcells...it doesn't help -- the canopy has
the same airspeed into the wind as it does with the wind. (though
it does keep you from blowing away if the winds are strong).


-- 
/* Dale Southard Jr.                                 Sr. Rigger      */
/* University of Toledo                             AFF/I   SL/I     */
/* dsouth@uoft02.utoledo.edu                           D-11216       */
/* Department of Chemistry -- "Just another skydiving grad student." */
Newsgroups: rec.skydiving
From: nws@stout.atd.ucar.edu (Eddie Roberts (The National Weather Service))
Subject: How to calculate freefall time ?
Organization: Atmospheric Technology Division/NCAR Boulder, CO
Date: Tue, 8 Sep 1992 17:56:25 GMT



Can someone post the correct formula to use in calculating
freefall time. In a recent post the following 'C' code
was used:

>      if (jump_altitude > standard_opening_altitude)
>      	ff_time += (jump_altitude - standard_opening_altitude)/200 + 5;

If I exit at 10,000 ft. and pulled at 4000 ft. I should get 35 seconds of
freefall time right? (10000 - 4000)/200 = 30 + 5 = 35.

Yet on my log book completed by a AFF JM I have 45 seconds of freefall
time for this type of jump. Our class was told that if we multiply 
(jump_altitude - opening_altitude) by seven and add 3 we would get
our correct freefall time.

I am keeping my own log now and want to make sure I keeping
track of freefall time correctly.  What is the correct way to
calculate freefall time?


	Thanks 
		Eddie 	
From: boucher@hpcc01.corp.hp.com (Richard A Boucher Jr)
Date: Fri, 4 Sep 1992 15:57:13 GMT
Subject: Re: You may pick up your pencils...
Organization: the HP Corporate notes server
Newsgroups: rec.skydiving



I forgot to mention another reason I wanted to ask the question... I've been
calling around about used gear and in the past 2 months I've spoken with 2 
guys who did about 30 and 50 jumps, respectively, had a reserve ride, and 
placed their gear up for sale immediately.  

Got me to wondering if the folks with 1000 jumps go through the same soul
searching that the newbies do after their first reserve ride. 


-RB
From: dbriggs@zia.aoc.nrao.edu (Daniel Briggs)
Newsgroups: rec.skydiving
Subject: Re: Richmond IN Boogie
Date: 9 Sep 92 19:24:44 GMT
Organization: National Radio Astronomy Observatory, Socorro NM

In article <825.2AADE374@ehsnet.fidonet.org>
  SKYDIVE@f15.n233.z1.fidonet.org (SKYDIVE) writes:
>Reply-to: Nancy.Jo@p0.f68.n110.z1.fidonet.org (Nancy Jo Irwin)
>Another was caused by a double grip on exit from the CASA. A rather thin lady had a double grip with a man on exit.
>She went under the base on exit and the double grip broke her arm.
>It was not her pull arm although someone else on the load realized that her arm was broken and attempted to pull for her. She pulled for herself at 8000. Luckily there were only three people above her-two video guys and a diver.
>By the way it was her hundredth jump. 

Anyone have a contact address for this woman?  I think I'd like to send her
a sympathy card.  Or maybe a birthday card.

-- 
| Daniel Briggs  (dbriggs@nrao.edu)                      |        USPA B-14993
| New Mexico Tech / National Radio Astronomy Observatory |            DoD #387
| P.O. Box O / Socorro, NM 87801   (505) 835-7391        |
Support the League for Programming Freedom  (info from league@prep.ai.mit.edu)
From: schut@prl.philips.nl (Schut G)
Newsgroups: rec.skydiving
Subject: Re: Weeee...My first jump
Keywords: tandem
Date: 15 Sep 92 13:13:34 GMT
Distribution: rec
Organization: none

In article <1992Sep15.012558.20367@mercury.cair.du.edu> tjreynol@zephyr.cair.du.edu (The Jumpin Dude) writes:
>In article <5674@ucsbcsl.ucsb.edu> 6500fly@ucsbuxa.ucsb.edu (Carmen Mullenhoff) writes:

<< stuff deleted >>
>
>>But I'm wondering if
>>now would be a good time with cooler weather on the way
>>or if it would be better to wait for Spring time?
>
>now is almost always the best time to skydive. exceptions that 
>come to mind are: you're congested, or the FAA is watching me.
>^H^H^H^H^H^H^H^H^H^Hdamn
>what i meant to say, of course, is that unless you're at Couch Freaks, 
>^H^H^H^H^H^HARGH

I agree with you here (on the 'now' part, not the ^H etc.)

>just be SAFE, and have a lot of fun. don't wait till spring; it'll cost
>more. you know how the cost of beer keeps going up...

That may be so, but in my experience (ok, so I'm jumping only since last
october) the winter is the more expensive season, due to the early
sunset and consequently early BT (Beer Time). 

>>Free falling in CA,
>>Carmen     
>>carmen@jinx.llnl.gov
>
>tim :-)
>

Gerhard                                            schut@prl.philips.nl
From: news@ai.mit.edu (news)
Newsgroups: rec.skydiving
Subject: Re: Spotting and Ground Speed
Summary: Joe was right -- difference between airspeeds counts, not groundspeed
Keywords: airspeed groundspeed spotting separation
Date: 15 Sep 92 22:38:49 GMT
Organization: MIT Artificial Intelligence Lab

From: grg@boo-berry.ai.mit.edu (Gregory Galperin)