Kevlar
05-26-2008, 11:43 PM
#2
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RE: Kevlar
In the states.Wicks aircraft supply.They have the kevlar and the west epoxy system. I have used it to build floats for full size aircraft and to patch holes that Skymaster put in the wrong place on my 1/6 f 16 fuel tanks worked well for me.
Joe
Joe
05-27-2008, 12:08 AM
#3
My Feedback: (1)
RE: Kevlar
In the states, there is also http://www.acp-composites.com/ Don't forget to get the special tool to cut it. Normal scissors won't work.
http://www.acp-composites.com/acp-sbwf.htm
http://www.acp-composites.com/acp-ta.htm
Arnaud
http://www.acp-composites.com/acp-sbwf.htm
http://www.acp-composites.com/acp-ta.htm
Arnaud
05-27-2008, 11:55 AM
#7
My Feedback: (19)
RE: Kevlar
Get a crow foot weave Kevlar, The plain weave can be hard to get around tight radius corners, Regular good quality scissors work fine for cutting Kevlar, in fact a cheap pair will work , you just need to run the blades on a grinder 90 degrees to the blade to give the blade some tooth so the kevlar won't slip out while cutting, do a search on google for Cutting Kevlar fabrics.
05-27-2008, 12:35 PM
#8
Senior Member
RE: Kevlar
Kevin Whitlow had a great suggestion on cutting Kevlar; go to the store and buy several pairs of really cheap scissors. They will not last very long, but a couple pairs might get you through a set of tanks.
I just did a set of tanks using 3.3 oz Kevlar. I used 3 layers, which was just barely enough, 4 or 5 layers would have been better (but I ran out of fabric).
I just did a set of tanks using 3.3 oz Kevlar. I used 3 layers, which was just barely enough, 4 or 5 layers would have been better (but I ran out of fabric).
05-27-2008, 01:06 PM
#9
RE: Kevlar
Ok...I guess I´ll buy a few cheap scissors.
Did you applied all layer at onces?...or each layer was a new epoxy mix?
How about using several layer of 1.7 oz intead of a few of 3.3?
Does this material remain well at the mold corners? ...I´m planning use the positive mold technique...
Tks,
MS
Did you applied all layer at onces?...or each layer was a new epoxy mix?
How about using several layer of 1.7 oz intead of a few of 3.3?
Does this material remain well at the mold corners? ...I´m planning use the positive mold technique...
Tks,
MS
05-27-2008, 01:23 PM
#10
My Feedback: (1)
RE: Kevlar
ORIGINAL: S_Ellzey
Kevin Whitlow had a great suggestion on cutting Kevlar; go to the store and buy several pairs of really cheap scissors. They will not last very long, but a couple pairs might get you through a set of tanks.
I just did a set of tanks using 3.3 oz Kevlar. I used 3 layers, which was just barely enough, 4 or 5 layers would have been better (but I ran out of fabric).
Kevin Whitlow had a great suggestion on cutting Kevlar; go to the store and buy several pairs of really cheap scissors. They will not last very long, but a couple pairs might get you through a set of tanks.
I just did a set of tanks using 3.3 oz Kevlar. I used 3 layers, which was just barely enough, 4 or 5 layers would have been better (but I ran out of fabric).
Ceramic coated scissors work best for the heavier stuff. Just be sure that you don't use your expensive ceramic scissors to cut anything except Kevlar, as soon as you do they will be useless. (guess how I found this out?)
Here is the thread I did on making tanks several years ago:
http://www.rcuniverse.com/forum/m_13.../tm.htm#132449
Steven, you might recognize the molds.
05-27-2008, 01:24 PM
#11
Senior Member
My Feedback: (11)
RE: Kevlar
Miguel - for holding material onto the tank ... I was going to spend the money on a vacuum system, but the guys at ACP told me to just use indutrial grade "Cling Film" and stretch that around the tank while waiting for the resin to set.
See http://www.rcuniverse.com/forum/fb.asp?m=3538375
See http://www.rcuniverse.com/forum/fb.asp?m=3538375
05-27-2008, 02:08 PM
#12
RE: Kevlar
Wao...I was thinking on that Gordon.
My intention is to make the molds with foam...and wrap them with the same plastic film use for storage food. Then apply the layers of kevlar with epoxy, to finally use the steaching film to hold everything in place and tigh...
What do you think?
My intention is to make the molds with foam...and wrap them with the same plastic film use for storage food. Then apply the layers of kevlar with epoxy, to finally use the steaching film to hold everything in place and tigh...
What do you think?
05-27-2008, 02:28 PM
#15
My Feedback: (1)
RE: Kevlar
Miguel,
The stretchy film as a mold covering will probably work fine as long as your tanks don't have any concave surfaces. If there are concave surfaces you will have more luck covering the molds with a low temp iron on covering like Econokote. That is what I used to make the molds in the thread I posted below.
The nice thing about the Econokote covered molds is that they can be reusable. Those particular molds have now made three sets of tanks and are still in good condition.
The stretchy film for holding layers in place is a good idea too.
The stretchy film as a mold covering will probably work fine as long as your tanks don't have any concave surfaces. If there are concave surfaces you will have more luck covering the molds with a low temp iron on covering like Econokote. That is what I used to make the molds in the thread I posted below.
The nice thing about the Econokote covered molds is that they can be reusable. Those particular molds have now made three sets of tanks and are still in good condition.
The stretchy film for holding layers in place is a good idea too.
05-27-2008, 02:40 PM
#17
My Feedback: (1)
RE: Kevlar
ORIGINAL: Miguel Santana
Kevin,
I saw your thread...nice work.
Can you give more details about the mixture of cabosil and resin for the corners...?
MS
Kevin,
I saw your thread...nice work.
Can you give more details about the mixture of cabosil and resin for the corners...?
MS
I usually just guess at how much cabosil I will need for the job, pour it into a mixing cup, then add mixed resin until it is about the consistency of paste (the stuff pre-school kids use for art projects). I think the mixing cups I use are 3 ounces, and I usually fill them about 1/3 to 1/2 with cabosil then add resin.
You only want to use enough to make a small fillet in the inside corners where the cloth will not make contact with the mold. If you use too much it will only add weight/thickness, and weaken the part. If you use too little you will likely get air pockets.
Should be just enough to form a little "ramp" for the cloth to follow up the corner.
05-29-2008, 06:38 PM
#19
My Feedback: (5)
RE: Kevlar
Miguel,
I buy kevlar cloth from this selles on Ebay.
http://cgi.ebay.com/1-7-OZ-KEVLAR-FA...QQcmdZViewItem
I make the kevlar tanks for my Vigilante.
I use balsa plugs and poliuterane primer to finish. Aply the orange gel mold and fiberglass with resin to get molds. The pics show better my process.
When ready I post pics here.
Regards,
Fabio
I buy kevlar cloth from this selles on Ebay.
http://cgi.ebay.com/1-7-OZ-KEVLAR-FA...QQcmdZViewItem
I make the kevlar tanks for my Vigilante.
I use balsa plugs and poliuterane primer to finish. Aply the orange gel mold and fiberglass with resin to get molds. The pics show better my process.
When ready I post pics here.
Regards,
Fabio
05-30-2008, 05:02 PM
#21
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RE: Kevlar
Kevin how about hybrid carbon/kevlar weave, you say not to cut anything else with the ceramic scissors what would you use to cut through two diffrent kinds of fabric?
05-17-2009, 11:15 AM
#22
My Feedback: (5)
RE: Kevlar
Miguel,
I finished my tanks months ago but only now i can post the pics.
[img]C:\Users\Fábio\Desktop\Jets\Vigilante\Anuncio\dcs0 1232[/img][img]C:\Users\Fábio\Desktop\Jets\Vigilante\Anuncio\tank[/img][img]C:\Users\Fábio\Desktop\Jets\Vigilante\Anuncio\3[/img][img]C:\Users\Fábio\Desktop\Jets\Vigilante\Anuncio\5[/img]
