[balloon-makers] F111, Soarcoat and fabric weight

Mike & Tammie skyfun at ncia.net
Tue Oct 23 13:19:25 CDT 2001

Roland and all,
If my memory serves me correctly and it doesn't always do that, I believe
that F-111 is a trade name of the Harris company. They made or may still
make fabrics for the parachute industry. I think F-111 then just became the
common name for calendared ripstop nylon just as kleenex became a common
name for tissue.  I could be all wrong about this but I'm SURE someone will
tell me if I am....

By the way, if there is a vote on where the homebuilt crowd should get
together once a year....  I vote to keep it in VERMONT!!

Mike Lavoie
----- Original Message -----
From: "Roland Escher" <rescher at rescher.com>
To: <balloon-makers at deering.org>
Cc: <arnaud.deramecourt at polytechnique.org>
Sent: Monday, October 22, 2001 11:50 PM
Subject: [balloon-makers] F111, Soarcoat and fabric weight

> Dear balloon-makers:
> (Note: I am asking this question both for my own benefit and for
> Arnaud Deramecourt, a French builder who is ready to move to lighter
> fabrics. His first envelope was Polyester.)
> My first experience with light balloon fabrics was in Brian Boland's
> brochure. He sells 1.1 uncoated calendared fabric and 1.3 oz silicone
> coated fabric. As people have noted before, the silicone fabric has
> zero porosity, but is fairly slippery to sew. The 1.1 oz fabric
> doesn't quite have zero porosity, but it is lighter and easier to sew.
> People often use the term "Soarcoat" to refer to 1.3 oz silicone
> coated fabric. From what I understand, Soarcoat is simply a brand
> name for one manufacturer's 1.3 oz silicone fabric. I've also heard
> the name "F111" tossed around (most recently in Phil's description of
> his 25k ran-out-of-pink envelope at
> http://www1.jump.net/~macnutt/macnutt.html ). Is F111 simply a brand
> name of 1.1 oz non-coated fabric? If yes, what manufacturer makes
> F111 and where can we buy it?
> Westmark in Connecticut sells 1.1 oz uncoated and 1.3 oz silicone
> coated fabrics as well. They call both of their fabrics "Silktique".
> (See http://www.westmark-ct.com/silktique.html for details.)
>  From your experience, is there any difference between the various
> brands of 1.1 oz calendared and 1.3 oz silicone coated fabrics? What
> about price differences? Finally, what other sources are there
> besides Boland and Westmark? Boland is relatively expensive, I
> haven't contacted Westmark yet. (Please reply to me off list if you
> are not comfortable sharing your supplier info with the entire group.)
> Personally, I was considering a 25,000 cu ft envelope made entirely
> of 1.3 oz silicone material to replace the heavy 14,000 cu ft
> envelope on my Cloudhopper (made of HTN90, I believe). But after
> Phil's comments and some discussion with John Ninomiya, I'm leaning
> towards a 31,000 cu ft envelope made entirely of 1.1 oz uncoated
> material, possibly with the parachute and top few panels of 1.3 oz.
> (I would want to get samples of 1.1 oz uncoated fabric from various
> manufacturers to try to find the one with the lowest porosity and
> highest tear strength, if there are any differences between products.)
> If I can get enough input, I'd be happy to compose an Excel
> spreadsheet with performance and price data for the various fabric
> qualities from various suppliers.
> I'm looking forward to the discussion about fabric qualities, brands
> and prices.
> Gentle winds,
> Roland
> --
> Roland Escher
> www.rescher.com
> -------
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