HDTenEightyP/NetNews huggingface dataset:
From: dwabra@watson.ibm.com (David Abraham)
Subject: Why do blade fins work better?
Date: Mon, 16 Nov 1992 19:44:30 GMT
Distribution: rec
Disclaimer: This posting represents the poster's views, not necessarily those of IBM
Organization: IBM, Yorktown Heights, NY 10598


So- the title says it.  Seems like for (at least) straight line speed
blades are dominating.  I like the one I have pretty well, although to
tell you the truth, aside from feeling looser I can't swear it really
is faster since I haven't done side-by-side comparison.  Anyway, let's
assume it is faster.  The question is, why?  The differences I see are
two- the obvious one is the aspect ratio, and the other is the thin
foil that is possible with the stiffer G10 material.  As far as aspect
ratio goes, I know that most low drag shapes tend this direction, such
as sailplane wings and so on.  For high lift at low speeds airplane
wings tend to be stubbier with thick airfoils.  Not so efficient, but
if you have plenty of power they are more forgiving.  

With a thin foil you would get less lift for a given planform and a
given speed.  Also, you have less drag.  I don't know how this
balances out- why is it that it's more efficient to have a thinner
foil but pay by having a greater fin area to compensate for this
effect?

Now, as far as aspect ratio goes, the statement is that equal areas in
different shapes give different efficiencies.  I am thinking that this
is because turbulence becomes more severe with the low aspect fin,
adding drag.  I did a very (!) crude calculation, and for a fin of 10
cm. width moving at 10 m/s (about 20 mph), width a kinematic viscosity
of water of 0.01 cm**2/s we get a Reynolds number of a million.  This
is to my understanding well into the turbulent regime, and I am hard
pressed to see why a factor of a few in the width is going to be
important.  (Laminar flow happens up to Reynolds numbers of thousands,
not millions).  The other cute thing that comes out of this is, if
these factors of a few are important then you could see a similar
effect when sailing in really hot or cold water.  The difference
between water at 0 degrees and say 35 C is about 2.6 (in viscosity),
an equivalent change to going to a blade from a old-style fin.  The
sense of the change is such that colder water would be lower drag.  

Just rambling on.  Any people out there REALLY know what's going on?
 
--
David Abraham            dwabra@watson.ibm.com
IBM T.J. Watson Research Laboratory
(914) 945-2573
Newsgroups: rec.windsurfing
From: u9250301@cc.uow.edu.au (Michael James Nelson)
Subject: olympic's
Organization: University Of Wollongong
Date: Mon, 16 Nov 92 05:08:57 GMT


Thought some would like to know, the next olympic board will be the 
Mistral One-Design, and pumping will be allowed!

Michael Nelson KA12
Newsgroups: rec.windsurfing
From: nickn@mummy.agsm.unsw.OZ.AU (Nick_Nikov)
Subject: Re: Offset on Mast Foot ?
Organization: Australian Graduate School of Management
Date: Wed, 18 Nov 1992 22:44:46 GMT

In article <1992Nov17.235244.2292@lmpsbbs.comm.mot.com> bohning@mot.com (Terry Bohning) writes:
>I am a first-time shortboarder and purchased a Windsurfing Hawaii
>"Star Base".  Does anyone know why the mast base can be offset
>with respect to the board centerline?  Under what conditions
>would one prefer to have it on particular side of the board
>centerline?
>thanks, 
>Terry Bohning
>bohning@acc.fau.edu
On short boards, try standing the board on its tail and mark where your nose
meets the mast track. You will find this is a good starting point for 
positioning for winds around 20 knots....Sorry rereading I dont think
this is what you asked but ....

If you are referring to the offset of the base, this is only due to how
the base is made. There is no performance advantage to be offset nor I believe
a disadvantage. Next have a look down at the base and if you have a rubber
uni you will see that it is offset also when powered up.

-- 
-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
Nick Nikov  		    Internet (AARnet): N.Nikov@unsw.edu.au
Australian Graduate School of Management,	Tel: 61 2 931 9263
P.O. Box 1, Kensington. N.S.W. 2033.		Fax: 61 2 662 7621
From: simont@praxis.co.uk (Simon Tait)
Newsgroups: rec.windsurfing
Subject: Choice of Mast
Date: 17 Nov 92 13:54:50 GMT
Distribution: eunet
Organization: Praxis, Bath, U.K.


I'd welcome some advice about buying a new mast.

At present I have a North AL75 Heavy Duty (epoxy?) and a Rotho Wave.

I'd like to get a new "slalomy" mast, which gives better performance
from my sails, particularly when I'm using my Screamer (277, ~100litres).
I'd like power and stability, perhaps over a wider wind range.  I'd
quite like lightness.  I don't sail in waves very much.
I need a two part mast.

My sails are all 5 batten rotational:
F2 Speed Slalom 1990(?) 6.4, monofilm
Hyline Kahala Sprint 1990 5.7, part monofilm
Barnstormer Aqualite 5.2, mylar

I may move into more race oriented sails in due course.

Can anyone suggest what stiffness of mast would be best?
I don't even know what stiffness my existing masts are.

I've seen a Lodey slalomy mast, 7.4 stiffness, and also a
TSS? Slalom mast.  Would these be a good choice?

Thanks very much for your help!

Simon Tait

Praxis Systems plc, Bath, England.
Newsgroups: rec.windsurfing
From: gboates@admin.acadiau.ca (GARY BOATES)
Subject: blade fin update
Keywords: hi-winds
Organization: Acadia University
Distribution: netherworld of windsurfing
Date: Mon, 16 Nov 1992 14:50:21 GMT

Friday, Nov.13th, Eastern Canada had the last BIG BLOW of the season. 
Sailors in the south of Nova Scotia headed for Crescent Beach located at 
the end of Green Bay(get the map out).  This will probably prove to be the 
last of the big warm fronts... this one has a 1000 miles of winter on the 
backside of it.  WHAT IS THIS WHITE STUFF?? (comment from Sunday's snow) 

Anyway,  Friday was 35 knots to 50+ knots in the gusts.  The gusts were so 
long in duration that they almost didn't qualify as such; and the 
temperature was 16 C.!  I slipped a Hyperform blade into the box of my full-
wave 8'6" Angulo.  The G-10 blade is 13" and very narrow (3"), I had hoped 
for big waves but all our wave spots were not sailable, so it was the 
"backbay" or tidal flats.  Good for speed! My 200+ lb. friend was 
overpowered on his 3.7 so he packed it in. An other young sailor came in 
with his NP 4.5, a good chunk of air where a monofilm panel used to be. 
Can't blame that one on old Neil!

So to make a long story shorter... the blade works on a wave board - it was 
fast, felt solid, didn't "buck' in the jibe when I would change my weighting 
on the board - of course it was flatwater BUT major power.  I knew they were 
OK in 4.0 - 5.0 (small blades, that is) I felt that it was necessary to 
squat or bend my knees much more that before to complete the jibe in those 
conditions but otherwise it was fast and sure!

The next day I went to the "big city" and bought a snowboard - oh ye of 
little faith!! 
See you all in Maui in April '93!
Gary
From: poulton@hpl-opus.hpl.hp.com (Ken Poulton)
Date: Thu, 19 Nov 1992 20:48:01 GMT
Subject: Re: it's gettin' cold in middle europe ...
Organization: HP Labs, High Speed Electronics Dept., Palo Alto, CA
Newsgroups: rec.windsurfing

> Just remember that they haven't had any wind in the SF area in
> about two months, if I'm correct. 

Depends on your definition of "any wind".  I kept sailing twice a week
(using up to a 6.2) until Oct 21.  It's been pretty quiet since then.

>   Juri Munkki					       Windsurf: fast sailing
>  jmunkki@hut.fi				       Macintosh: fast software
							^^^^^^^^^^^^^^^^^^^^^
						    can you lose the ad, Juri?

Ken "waiting for some storms" Poulton					
poulton@hpl-opus.hpl.hp.com
From: lonachon@mehta.anu.edu.au (andrew longhorn )
Newsgroups: rec.windsurfing
Subject: Re: Any info on Maui?
Date: 16 Nov 1992 02:14:48 GMT
Organization: Australian National University
Distribution: world
Reply-To: lonachon@mehta.anu.edu.au
NNTP-Posting-Host: mehta.anu.edu.au

Don't sail above your ability!

I went there for 2 weeks last year (intented to) but had to leave after 4 days,
The hard-rock cafe comp was on at hookipa but I wanted to sail so I went to the
beach to the left (beach? did I say beach?) needless (needles?) to say, after
numerous minor cuts received when trying to launch and land, and after some
unreal wave rides, I broke a fin when launching, got dragged off the reef and had to
try and grab the reef with one hand and the board with the other. Then, to avoid
getting worked I had to scramble up the side of the shelf and carry my gear back.

I went to hospital with multiple lacerations and many stupid bloodly sea-urchin
spines.

Apart from that I had an awesome time but it really put a downer on things.
Walking through the airports with bandages and showercaps on my feet was pretty
fun too.

I rented my car from dollar rentals (I think, it's something like that, it's
tucked away on the small road near the airport, they even supplied roof racks
and gave me some money back when I returned early.)

Most the shops on maui give excellent hire deals, they can't afford not to,
you can usually change equipment to.

If you get the chance, go for a rip on a floaty board from hookipa to kanaha,
it's really cool.

Winds are pretty consistent the times I've been there, I think summer is the
high-wind/low swell and winter is not so high wind and big swell with a moderation
of both in spring and autumn. I went there last in june and there was enough swell
to hold nice 3/4 mast (front of wave) waves on the reefs and 20+ knot winds that
increased steadily all afternoon. A 5 meter sail is huge for these guys.

Great food at sizzlers salad bar (has pastas tacos etc, all you can eat $8)

Check out the nightlife at Lahaina, Angulo's band plays there, lots of art galleries
which are really cool when you're smashed.

Hang loose, AND DON'T WOBBLE YOUR HAND IF YOU DARE TO SHAKA!

I haven't seen the results but have heard nasty stories.

Also check out Cassonovas in the small town south of Paia (towards the crater), it
has never failed to house a bevy of gorgeous babes on fridays.

Tell me how your trip goes. I've been too busy to return this year but I'm going
again next year.

Have fun and cut a few waves for me.

Andyroo.

KA-RV.
From: D_TODARO@unhh.unh.edu (Dave Todaro)
Newsgroups: rec.windsurfing
Subject: Re:    Instruction videos
Date: 18 Nov 1992 04:59:03 GMT
Organization: University of New Hampshire
Distribution: world
NNTP-Posting-Host: unhh.unh.edu
X-News-Reader: VMS NEWS 1.12

In <92321.135110SHIN@SLACVM.SLAC.STANFORD.EDU> <SHIN@SLACVM.SLAC.STANFORD.EDU> writes:

> I'm looking to buy an instruction video which might help in
> learning waterstarts and jibes. (I asked the Net for advise
> 
> Have any of you seen these videos, and what's your opinion regarding
> their usefulness?  Thanks for your help...
> 
>                        Harry Shin

Hi, there!  I bought "Beach Starts, Water Starts, and High-Speed Jibes from 
Red Mountain Productions.  (purchased from WS express)  I thought it was very
good, and has helped me quite a bit on my waterstart.  I've watched it a few
times and it's helped me out more each time.  The quality I like most about
the video is that they go over each technique what seems like quite a few times
when you first watch it.  After coming back from experimenting on the water,
however, the 13 quadrillion instant replays form an integral part of learning
what exactly you are doing wrong.  (or right!)

I'd definitely recommend it, although I haven't seen any of the other videos
you mentioned.

Dave

Newsgroups: rec.windsurfing
From: jmunkki@vipunen.hut.fi (Juri Munkki)
Subject: Re: it's gettin' cold in middle europe ...
Reply-To: jmunkki@vipunen.hut.fi (Juri Munkki)
Organization: Helsinki University of Technology
Date: Mon, 16 Nov 1992 17:01:59 GMT

In article <1992Nov16.151943@gese.ge14.mdadv.gv.at> sca@gese.ge14.mdadv.gv.at (Petzi Schweda) writes:
>The happy chattin' of all you US-guys is drivin me nuts -
>in Vienna wev'e got below 10 deg. celsius and it's raining !

Just remember that they haven't had any wind in the SF area in
about two months, if I'm correct. Besides, 10 deg C sounds like
windsurfing weather to me. At least you still have open water
and it isn't snowing all the time.

-- 
  Juri Munkki					       Windsurf: fast sailing
 jmunkki@hut.fi					      Macintosh: fast software
Newsgroups: rec.windsurfing
From: haaged@cary111.its.rpi.edu (Dana Robert Haagensen)
Subject: COMPLAINING
Reply-To: haaged@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY.
Date: Mon, 16 Nov 1992 23:21:08 GMT


    Well, it seems as though the rest of you guys are spoiled because
                 1)  I'm stuck at college without a board
		 2)  It`s snowed twice here already, and the temperatures
                         are 30-40 degrees
		 3)  There`s nothing but LAKE sailing to do here
                 4)   I don`t have the time to sail - What do you guys do for
                             a living ??????????

	Actually, it probably doesn`t matter much anyway because I'm not 
        exactly beyond beginner skill level yet anyway.  But I still love
	to sail.

	Is anyone else from the Massachusetts area - Cape Cod ??????
 	It seems as though everyone is from the places I wish I were :
                 FLORIDA,CALIFORNIA,AUSTRALIA,EUROPE

	Where can I get an intermediate board cheep ??? (Like
		F2 Comet, etc.)
	Or even better, sails cheep ??? (5.0m,6.2-6.5m)

	Does anyone want a F2 Strato (good condition)

	I wish I knew what a wave was !!!!!! Let alone wave sailing

	New to the network, if you haven't noticed

	

	******* Does anyone in the Albany, NY or Massachusetts areas
		have good CO-OP jobs available for a future genious in
		mechanical engineering (especially those from the big
		companies I keep seeing on the network). Relating to
		windsurfing or not.


	WISH I HAD MONEY, WARMTH, WIND, TIME,   and had gone to
						school somewhere
						warmer !!!!!!!!

	Stuck in NY  -      Dana Haagensen at haaged@rpi.edu (e-mail)
					"No fancy signature yet"
From: cgh@world.std.com (Curtis G Hartmann)
Newsgroups: rec.windsurfing
Subject: WINDSURFING EQUIPMENT - FOR SALE!!
Date: 17 Nov 92 17:40:54 GMT
Article-I.D.: world.BxvFs6.4t0
Distribution: usa
Organization: The World Public Access UNIX, Brookline, MA

----->  FOR SALE  - Windsurfing Equipment - Prices Reduced<-----

- Getting out of the sport...everything must go!!!
- All equipment is in great shape and is meticulously maintained.

Boards
-------
1991 8'6" Wind and Surf Bump and Jump Board (Glass Board)
	- Great Shape (few dings)
	- Turns great
	- includes:
		- DaKine Board Bag
		- straps 
		- 2 fins (regular tab)
			- 11" True Ames Surf Slalom
			- 10" Flat Island Weed Fin
	- $550 

Sails
-----
1991 5.4 Windsurfing Hawaii Slalom Comp (Great Shape)	$150
1992 5.0 Neil Pryde Combat Wave (Sailed 3 times)  $275 
1991 4.5 Neil Pryde Combat Wave (Sailed 5 times)  $250
1991 4.0 Neil Pryde Combat Wave (Sailed 4 times)  $250 
1991 3.5 Windsurfing Hawaii Wave Comp (Sailed 4 times)	$175
1991 3.0 Windsurfing Hawaii Wave Comp (Sailed 2 times)	$175

- All of these sails are in perfect condition.
- Combat Waves are indestructible - will last forever.
- Will give great deal for multi-sail purchases

Masts
------
1992 15'1" Neil Pryde Carbon 60  Slalom Mast (Sailed 5 times)	$125
1991 15'1" Neil Pryde V-Glass Wave Mast	$75

Booms
-------
1991 Windsurfing Hawaii Power Taper (w/ '92 front-end) w/ extensions.   $100
1991 Windsurfing Hawaii Power Taper (w/ '92 front-end).  $100

Bases/Extensions
------------------
Neil Pryde Power Base/Neil Pryde Extenion (All new parts)  $50
Chinook Extension w/ Streamlined Base  $60

Misc Equipment
----------------
- Visual Speed Board Bag ( for 9' and smaller board) $45
- 3 fins (power box):
	- 13 1/2" True Ames Giadimenichi G-10 Pointer   $60
	- 12 " Flat Island Weed Fin				      $40
	(All in perfect condition)
- 1992 O'Neill Oasis Dry Suit (Used 1 time)		$225

---------------------------------------------------------------
Would prefer to deal with people in New England or NY.

Please call Curtis @ (518) 356-5917 (leave message)
DO NOT SEND EMAIL!!!! -- I don't read it on a regular basis!!
	- COD, you pay the shipping!
	- Call only if you're serious!!!
	- This is top notch equipment at a great price!!
	
Newsgroups: rec.windsurfing
From: uh311ae@sunmanager.LRZ-Muenchen.DE (Henrik Klagges)
Subject: Re: Hot Air = Big Sails?
Organization: Leibniz-Rechenzentrum, Muenchen (Germany)
Date: Tue, 17 Nov 1992 18:40:57 GMT


I might add that although humans are warm-blooded,  holding on to that
4.0 MegaSpeed in a frigging force-ten moving in from the atlantic at 8
degrees celsius is just like operating at the lower end of your usable
survival range. Reaction speed and power output simply seem to drop.

Cheers,
  "life begins at 40 knots" Henrik

Newsgroups: rec.windsurfing
From: gtsrmas@strosa.unocal.com (Mitchel A. Stark)
Subject: Re: Mexican Windsurfing ?
Organization: Unocal Geothermal Division, Santa Rosa, CA
Date: Mon, 23 Nov 1992 23:16:41 GMT

I spent a few days each in Akumal and at the Cancun Vela Center in December '89.
At that time the only equipment in Akumal was a beat-up transition (?) board owned by a local guy who was an excellen freestyler.  I never actually sailed there, although there was at least one day of decent wind. Akumal's a lovely spot in an area with lots of archaelogy and reefs to explore.  My main objection
was the restaurants which tend to specialize in overpriced,
undersized portions of gringo food.  You're a captive audience, because there's not much else out there.  In the real village, however, there was a fine taqueria.

The Cancun Vela center is actually a few miles north of Cancun , near the ferry terminal for Isla Mujeres.  In three days there I had one day of 20 knots, one day of about 15 and one day of nada.  You can probably count on some pretty good flatwater
intermediate sailing, with a possibility of better. They had a great selection of boards and sails all rigged and ready to go on the beach.  The staff and guests were all friendly and helpful and I learned plenty.  It's not exactly a world-class beach, but has its charm.  You can find ads for Vela in any windsurfing magazine.

I spent another vacation on Isla Mujeres, during which time the wind never quit.  Alas, at that time I was not much of a windsurfer and spent the vacation waiting for the kind of weather that normal people seek when they vacation in Mexico.  From what I heard, this kind of weather can happen in mid-winter there, but is not likely in April.

--
Mitchel Stark	|\       Santa Rosa, CA
		| \
                |  \
		|   \
		|____\
	     ___|______
		      \
From: toma@hpfcso.FC.HP.COM (Tom Albertz)
Date: Wed, 18 Nov 1992 16:23:58 GMT
Subject: Re: Can someone please help?
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: rec.windsurfing

I don't think so.  I have never seen anything from a windsurf equipment
manufacturer.  We're all just engineers and/or students - aren't we ?
Newsgroups: rec.scouting
From: kiravuo@hut.fi (Timo Kiravuo)
Subject: Re: Rec.scouting change
Followup-To: rec.scouting
Reply-To: kiravuo@hila.hut.fi
Organization: Helsinki University of Technology, Computing Center
Date: 21 Nov 92 20:40:57

In article <hunter-201192130641@158.185.20.241> hunter@master.lds-az.loral.com (Bill Hunter) writes:
>We have been asked to vote for a change to the rec.scouting net.  I'm not
>sure what has driven us to this point, but I am pleased with the current
>cross-section of people and subjects.

I am not pleased with the current group. The internal policy of
BSA dominates the group and causes any interesting information to
sink among the signal noice, therefore causing most of use
foreigners to stay out.
--
Timo Kiravuo, kiravuo@hut.fi
Helsinki University of Technology, Computer Center, Finland
From: anthropo@carina.unm.edu (Dominick V. Zurlo)
Newsgroups: rec.scouting
Subject: Re: Violation of Netiqutte (was: Stan - Hatred is unbecoming)
Date: 16 Nov 92 18:42:36 GMT
Article-I.D.: lynx.ppjqr5=
Organization: University of New Mexico, Albuquerque

In article <1992Nov12.210927.20324@cbnewsl.cb.att.com> stank@cbnewsl.cb.att.com (Stan Krieger) writes:
>In article <ardq09m@lynx.unm.edu> anthropo@carina.unm.edu (Dominick V. Zurlo) writes:
>
>>Just for readers clarification, Stan's email to me begins the line
>>with a % sign.  Tim's original has >>>, Stan's reply has >>
>>and my reply to Stan has >.  I know most of you will realise this, but
>>this is just a clarification.  
>
>As all you netnews readers see from the header of Dominick's posting,
>what he did was to take private email from me and, without my
>knowledge or consent, publically post it.  Such behavior is a total
>violation of netiquette, and Dominick knows it.

Except that in my last email message to you Stan I had told you I would
refuse to deal with you through email and that any email you sent would 
be posted.  Especially when you are insulting and denegrating people 
without any backing.  You lost any courtesies you had from myself
when you refused to apologise for in essence calling myself and others
on this net child abusers.  Unitl such an apology is forthcoming, you 
have no rights to ettiquete of any kind from me.  
>
>I especially resent the use of the word "hatred" in the subject of
>Dominick's unauthorized posting of the email.  I simply do not agree
>with certain gay rights agenda assumptions.

Ahh, so you can call people child abusers for no reason and think that is not 
hatred?  Twisted thoughts there Stan.  Very twisted.  Go seek professional
help.  We aren't talking any rights assumptions.  We're talking a claim you 
make and have yet to substantiate.  Until you do so.  Go away. 
>-- 
>Stan Krieger                 All opinions, advice, or suggestions, even
>UNIX System Laboratories     if related to my employment, are my own.
>Summit, NJ
>smk@usl.com

The reason you are so angry Stan is becuase you can not back up your 
assertations except through *your* religion, which has no bearing 
oin this issue in it's overall context.  Back it up or shut up.


****************************************************************
*  Dominick V. Zurlo              *    "If the world's an      *
*  WWW                            *    oyster, why am I        *
*  Eagle Scout '87                *    allergic to Mollusks?"  *
*  blacklisted '88                *                            *
****************************************************************
All opinions are mine.  
Newsgroups: rec.scouting
From: mayne@eta.cs.fsu.edu (William Mayne)
Subject: Re: Religion _in_practice_
Reply-To: mayne@cs.fsu.edu
Organization: Florida State University Computer Science Department
Distribution: usa
Date: Thu, 19 Nov 92 21:57:57 GMT

In article <1992Nov19.162459.7647@col.hp.com> kary@col.hp.com (Dan Kary) writes:
>
>Certainly much of religion is ethics.  The distinguishing feature is a
>belief in God (a higher being) and this is a belief common to all religions.

Most of the problem stems from the fact that people seem to be
unwilling or unable to learn that it is not true that belief in
God - even very broadly defined, let alone the all too common
notion of the Christian God by another name - is common to all
religions? Perhaps if the BSA is going to pay more than lip
service to its ideals of pluralism and understanding others
it should add some real instruction in comparative religion.
This retraining is apparently most needed at the highest levels
of leadership.

Bill Mayne
Newsgroups: rec.scouting
From: rascherm@mcs213e.cs.umr.edu (Robert L Aschermann)
Subject: Re: COPE
Date: Fri, 20 Nov 1992 17:23:38 GMT
Distribution: usa
Organization: University of Missouri - Rolla


Newsgroups: rec.scouting