Re: Polytarp sail design
Here ya go:http://upd.net/sey/ultasail/
Allen
Allen
--- Inbolger@egroups.com, "Jeff Gilbert" <jgilbert@d...> wrote:
> Paul Heyse sells kits and full sails, and best of all offers sample
kits
> with samples of all materials
> plus apparently methodology etc for a bargain $5 US (7.50 to me in
> Australia)
> Heres his letter to me including his em address.
> His company name IS Ulta Sail, not Ultra.
> He welcomes enqiries, dont have his web page URL sorry.
> I do remember thinking that at his prices it would not be worth
building
> your own in the UAS, but overseas the postage costs ruins the
bargain.
> Jeff Gilbert
> (ps Going into hospital for a while , see you all after)
>
Pete try this
http://hometown.aol.com/polysail/HTML/index.htm
Cheers
Jeff Gilbert
http://hometown.aol.com/polysail/HTML/index.htm
Cheers
Jeff Gilbert
----- Original Message -----
From: Peter Vanderwaart <pvanderw@...>
To: <bolger@egroups.com>
Sent: Friday, June 30, 2000 1:32 AM
Subject: [bolger] Polytarp sail design
I am trying to get my thinking together to help Leander build
polytarp sails.
Paul Heyse sells kits and full sails, and best of all offers sample kits
with samples of all materials
plus apparently methodology etc for a bargain $5 US (7.50 to me in
Australia)
Heres his letter to me including his em address.
His company name IS Ulta Sail, not Ultra.
He welcomes enqiries, dont have his web page URL sorry.
I do remember thinking that at his prices it would not be worth building
your own in the UAS, but overseas the postage costs ruins the bargain.
Jeff Gilbert
(ps Going into hospital for a while , see you all after)
with samples of all materials
plus apparently methodology etc for a bargain $5 US (7.50 to me in
Australia)
Heres his letter to me including his em address.
His company name IS Ulta Sail, not Ultra.
He welcomes enqiries, dont have his web page URL sorry.
I do remember thinking that at his prices it would not be worth building
your own in the UAS, but overseas the postage costs ruins the bargain.
Jeff Gilbert
(ps Going into hospital for a while , see you all after)
----- Original Message -----
From: Paul Jeffery Heyse <paul@...>
To: Jeff Gilbert <jgilbert@...>
Sent: Tuesday, March 28, 2000 9:03 AM
Subject: Sail Kit
Jeff,
I would need the measurements from your design to be able to give
you a quote on the amount of material you would need. And thus what the
weight would be for shipping. On small orders shipping overseas is by
air freight. It is less expensive that way and is better handled. But I
would say just as a guess that it will be over $100.00 US for shipping.
So send me the I and J of the head sails and the P and E of the main
and mizzen and the length of the gaffs so I can figure it out.
The sample kit to you would be $7.50 US.
Paul J Heyse
Ulta Sail
----- Original Message -----
From: Peter Vanderwaart <pvanderw@...>
To: <bolger@egroups.com>
Sent: Friday, June 30, 2000 1:32 AM
Subject: [bolger] Polytarp sail design
I am trying to get my thinking together to help Leander build
polytarp sails.
And don't miss the part that shows how to relate the edge
curves to the spar you've got.
Mark
StepHydro@...wrote:
curves to the spar you've got.
Mark
StepHydro@...wrote:
>
> In a message dated 06/29/2000 11:<BR47:<BR01 AM
> Eastern Daylight,pvanderw@...writes:>
> > I am trying to get my thinking together to help Leander build
> > polytarp sails.
>
> Peter,
>
> Hard and fast rules probably aren't available on the topic, but your figures
> are a bit off those I've read. Though there are probably other sources for
> info on polytarp sails, Jim Michalak's website has far more than any other
> I've seen. He also has detailed a method of shaping that is entirely new and
> much simpler than traditional broadseaming. Take a look at his website. There
> are probably 4 articles on polytarp sails, maybe more.
>
> <A HREF="http://www.apci.net/~michalak/#Contents">Jim Michalak</A>
>
> You'll have to drill about to find what you want, but you will not be
> begrudge the time.
>
> Cheers/Step
>
> ------------------------------------------------------------------------
> 0% Introductory APR!
> Instant Approval!
> Aria Visa - get yours today.
>http://click.egroups.com/1/6035/13/_/3457/_/962307364/
> ------------------------------------------------------------------------
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
The caveat is that polytarps are cheap in both ways; they make terrible
sails. But, did I say they were cheap?
Nothing is better than a new set of sails - I just added a knot and a half
upwind while pointing a good 5 degrees higher. And, this is going from
blown-out dacron to laminated Sobstad Genesis (which is comparably to lots
of construction methods).
For instance, in my little 21 footer, I beat a Catalina 30 by almost an
hour in a 15 mile weather beat in 15 knot breeze. The sails made the
difference.
There a ton of hype in sailmaking, but it's a subtle and by-the-numbers
trade. Build a couple thousand sails and you got a pretty good idea where
to place the draft and why. Sailrite, for instance, has (almost) worn out
three of my cutting machines - they cut millions of dollars worth of sails.
Not to burst some recent bubbles, but they're not being taken to school by
the polytarp revolution. Having said that, they are plenty of sailmakers
that make faster sails, too.
I'm not a royalist when it comes to trade-built - I just throwing out fair
warning that if you find yourself sailing in a hole and you look up and see
a trash-bag bent to those beautiful hand-hewn spars, don't curse Bolger's
mother!
Gregg Carlson
At 11:32 AM 6/29/2000 -0700, you wrote:
sails. But, did I say they were cheap?
Nothing is better than a new set of sails - I just added a knot and a half
upwind while pointing a good 5 degrees higher. And, this is going from
blown-out dacron to laminated Sobstad Genesis (which is comparably to lots
of construction methods).
For instance, in my little 21 footer, I beat a Catalina 30 by almost an
hour in a 15 mile weather beat in 15 knot breeze. The sails made the
difference.
There a ton of hype in sailmaking, but it's a subtle and by-the-numbers
trade. Build a couple thousand sails and you got a pretty good idea where
to place the draft and why. Sailrite, for instance, has (almost) worn out
three of my cutting machines - they cut millions of dollars worth of sails.
Not to burst some recent bubbles, but they're not being taken to school by
the polytarp revolution. Having said that, they are plenty of sailmakers
that make faster sails, too.
I'm not a royalist when it comes to trade-built - I just throwing out fair
warning that if you find yourself sailing in a hole and you look up and see
a trash-bag bent to those beautiful hand-hewn spars, don't curse Bolger's
mother!
Gregg Carlson
At 11:32 AM 6/29/2000 -0700, you wrote:
>Jim Michalak has done a few writeups on polytarp sails. This link willtake you
>to his site, then search the back issues.
>http://www.apci.net/~michalak/#Mayfly12
>Jim
>
>
>------------------------------------------------------------------------
>Special Offer-Earn 300 Points from MyPoints.com for trying @Backup
>Get automatic protection and access to your important computer files.
>Install today:
>http://click.egroups.com/1/5667/13/_/3457/_/962303343/
>------------------------------------------------------------------------
>
>Bolger rules!!!
>- no cursing
>- stay on topic
>- use punctuation
>- add your comments at the TOP and SIGN your posts
>- add some content: send "thanks!" and "ditto!" posts off-list.
>
>
In a message dated 06/29/2000 11:<BR47:<BR01 AM
Eastern Daylight,pvanderw@...writes:>
Hard and fast rules probably aren't available on the topic, but your figures
are a bit off those I've read. Though there are probably other sources for
info on polytarp sails, Jim Michalak's website has far more than any other
I've seen. He also has detailed a method of shaping that is entirely new and
much simpler than traditional broadseaming. Take a look at his website. There
are probably 4 articles on polytarp sails, maybe more.
<A HREF="http://www.apci.net/~michalak/#Contents">Jim Michalak</A>
You'll have to drill about to find what you want, but you will not be
begrudge the time.
Cheers/Step
Eastern Daylight,pvanderw@...writes:>
> I am trying to get my thinking together to help Leander buildPeter,
> polytarp sails.
Hard and fast rules probably aren't available on the topic, but your figures
are a bit off those I've read. Though there are probably other sources for
info on polytarp sails, Jim Michalak's website has far more than any other
I've seen. He also has detailed a method of shaping that is entirely new and
much simpler than traditional broadseaming. Take a look at his website. There
are probably 4 articles on polytarp sails, maybe more.
<A HREF="http://www.apci.net/~michalak/#Contents">Jim Michalak</A>
You'll have to drill about to find what you want, but you will not be
begrudge the time.
Cheers/Step
Jim Michalak has done a few writeups on polytarp sails. This link will take you
to his site, then search the back issues.
http://www.apci.net/~michalak/#Mayfly12
Jim
to his site, then search the back issues.
http://www.apci.net/~michalak/#Mayfly12
Jim
It's pretty stretchy. On the ones I've done, I've had much better results if
I cut everything but the leech dead strait, and cut a hollow in the leech.
Otherwise, I always had to much of a hook on the trailing edge. Worked fine,
but lots of drag.
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
I cut everything but the leech dead strait, and cut a hollow in the leech.
Otherwise, I always had to much of a hook on the trailing edge. Worked fine,
but lots of drag.
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
----- Original Message -----
From: "Peter Vanderwaart" <pvanderw@...>
To: <bolger@egroups.com>
Sent: Thursday, June 29, 2000 10:32 AM
Subject: [bolger] Polytarp sail design
>
> I am trying to get my thinking together to help Leander build
> polytarp sails.
>
> As I think about how these things are supposed to work, it seems to
> me that an important point is that they must not be stretched too
> tight on the spars, especially the head and foot. Does that agree or
> disagree with anyone's experience?
>
> My calculations suggest that the depth of the curve built into the
> luff should be about 2.5% of the average distance from luff to leech.
>
> The depth of the curve on head and foot should be about half that
> each: 1.25%. The deepest part of the curve should be 30-40% from luff
> to leech.
>
> Finally, my thinking is that it is better to err on the side of a
> sail that is too flat than one that is too full.
>
> How stretchy is the polytarp sailcloth? Any comments would be welcome.
>
> Peter
>
>
> ------------------------------------------------------------------------
> Get Your Credit Report FREE and Online at ConsumerInfo.Com!
>http://click.egroups.com/1/5784/13/_/3457/_/962292817/
> ------------------------------------------------------------------------
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>