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Non certified fabric at ACS

 
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rickofudall



Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
PostPosted: Mon Jun 21, 2010 10:00 am    Post subject: Non certified fabric at ACS Reply with quote
Does anyone on the forum have experience with the non certified 2.7 oz. dacron Spruce is offering (part no. 09-00300). Better yet, anyone compared it with the 2.7 oz. Polyfiber fabric? The cracks in the Aerothane are starting to turn to peeled areas and at less than half the cost it makes doing a re-cover on Zulu Delta possible sooner than I had hoped.

Rick Girard

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John Hauck



Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
PostPosted: Mon Jun 21, 2010 10:17 am    Post subject: Non certified fabric at ACS Reply with quote
This is by no means a scientific response, but has been my understanding for many years.

Manufacture and sales of virgin (unshrunk) polyester-dacron aircraft fabric is limited to one or a couple mills.

A certain amount of lubricant is necessary during weaving to prevent burning the threads. The lighter and tighter the fabric, the more lube necessary. Thus HS90X was a very difficult to seal and fill all the damn pin holes.

Biggest expense with polyfiber is its certification, just like other aircraft parts. That polyfiber stamp costs as much as the fabric.

I have used generic virgin polyester-dacron with success. Would use it again if necessary.

john h
mkIII
[quote]
Does anyone on the forum have experience with the non certified 2.7 oz. dacron Spruce is offering (part no. 09-00300). Better yet, anyone compared it with the 2.7 oz. Polyfiber fabric? The cracks in the Aerothane are starting to turn to peeled areas and at less than half the cost it makes doing a re-cover on Zulu Delta possible sooner than I had hoped.

Rick Girard


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John Hauck
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PostPosted: Mon Jun 21, 2010 3:21 pm    Post subject: Non certified fabric at ACS Reply with quote
Rick

I always use uncertified...works just fine.. You can scrub it with
mek or acetone to clean the mill goo ... I have used the 1.7 or 8 and
the 2.7... Herb
At 12:36 PM 6/21/2010, you wrote:
Quote:
Does anyone on the forum have experience with the non certified 2.7
oz. dacron Spruce is offering (part no. 09-00300). Better yet,
anyone compared it with the 2.7 oz. Polyfiber fabric? The cracks in
the Aerothane are starting to turn to peeled areas and at less than
half the cost it makes doing a re-cover on Zulu Delta possible
sooner than I had hoped.

Rick Girard



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rickofudall



Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
PostPosted: Mon Jun 21, 2010 4:35 pm    Post subject: Non certified fabric at ACS Reply with quote
Herb, John, I was more concerned about the quality of the weave and if it shrinks uniformly. As it turns out this is the same stuff that they sell for use as peel ply in composite lay ups. I've used a bunch of it for that and it's free of any kind of sizing, at least all that I've ever gotten from them. I'll have to check what I have in stock. I may have enough to cover the wings left over from vacuum bagging projects. Herb, did you use the lighter weight for ailerons and flaps?
Rick Girard

On Mon, Jun 21, 2010 at 4:34 PM, Herb <herbgh(at)nctc.com (herbgh(at)nctc.com)> wrote:
[quote]--> Kolb-List message posted by: Herb <herbgh(at)nctc.com (herbgh(at)nctc.com)>

Rick

 I always use uncertified...works just fine.. You can scrub it with mek or acetone to clean the mill goo ... I have used the 1.7 or 8 and the 2.7...  Herb



At 12:36 PM 6/21/2010, you wrote:
Quote:
Does anyone on the forum have experience with the non certified 2.7 oz. dacron Spruce is offering (part no. 09-00300). Better yet, anyone compared it with the 2.7 oz. Polyfiber fabric? The cracks in the Aerothane are starting to turn to peeled areas and at less than half the cost it makes doing a re-cover on Zulu Delta possible sooner than I had hoped.

Rick Girard





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John Hauck



Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
PostPosted: Mon Jun 21, 2010 5:09 pm    Post subject: Non certified fabric at ACS Reply with quote
Herb, did you use the lighter weight for ailerons and flaps?
Rick Girard
====================================================
Realize you asked Herb.

Flaps are vulnerable to FOD and prop drumming, plus scrw drivers and other
tools and stuff.

I use heavy fabric on flaps and ailerons.

I have 18 year old/3,000+ dacron on my flaps that are still serviceable.

john h
mkIII

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PostPosted: Mon Jun 21, 2010 5:20 pm    Post subject: Non certified fabric at ACS Reply with quote
Rick

I used the 2.7 for all surfaces when I rebuilt my Kolb MkIII back in the mid 90's. Used 1.7 or 1.8 (which is it?) for all surfaces on my Firefly..Same for my N3 Pup...and Ultra star...Herb


At 07:27 PM 6/21/2010, you wrote:
[quote]Herb, John, I was more concerned about the quality of the weave and if it shrinks uniformly. As it turns out this is the same stuff that they sell for use as peel ply in composite lay ups. I've used a bunch of it for that and it's free of any kind of sizing, at least all that I've ever gotten from them. I'll have to check what I have in stock. I may have enough to cover the wings left over from vacuum bagging projects.
Herb, did you use the lighter weight for ailerons and flaps?

Rick Girard

On Mon, Jun 21, 2010 at 4:34 PM, Herb <herbgh(at)nctc.com (herbgh(at)nctc.com)> wrote:
--> Kolb-List message posted by: Herb <herbgh(at)nctc.com (herbgh(at)nctc.com)>

Rick

I always use uncertified...works just fine.. You can scrub it with mek or acetone to clean the mill goo ... I have used the 1.7 or 8 and the 2.7... Herb



At 12:36 PM 6/21/2010, you wrote:
Does anyone on the forum have experience with the non certified 2.7 oz. dacron Spruce is offering (part no. 09-00300). Better yet, anyone compared it with the 2.7 oz. Polyfiber fabric? The cracks in the Aerothane are starting to turn to peeled areas and at less than half the cost it makes doing a re-cover on Zulu Delta possible sooner than I had hoped.

Rick Girard





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arget="_blank">http://www.matronics.com/Navigator?Kolb-List
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rickofudall



Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
PostPosted: Mon Jun 21, 2010 5:25 pm    Post subject: Non certified fabric at ACS Reply with quote
John, Good point, I was thinking of making them as light as possible so I could decrease the balance weight. Plan B, use tubing instead of steel rod and pack one end with lead. I understand the flaps and ailerons on the B-36 were framed with magnesium. I suppose that's a little extreme, though. :-}

Rick

On Mon, Jun 21, 2010 at 8:07 PM, John Hauck <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)> wrote:
[quote] --> Kolb-List message posted by: "John Hauck" <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)>


Herb, did you use the lighter weight for ailerons and flaps?


Rick Girard

==


Realize you asked Herb.

Flaps are vulnerable to FOD and prop drumming, plus scrw drivers and other tools and stuff.

I use heavy fabric on flaps and ailerons.

I have 18 year old/3,000+ dacron on my flaps that are still serviceable.

john h
mkIII


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arget="_blank">http://www.matronics.com/Navigator?Kolb-List
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="_blank">http://www.matronics.com/contribution
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