REFLECTOR: Epoxy question
Ron N VelocityXLFG
velocityxl at fastmail.fm
Mon Oct 8 16:01:02 CDT 2012
Thanks I believe you would not want to use the 90 bid as tapes. It would
give only 1/2 the strength on a seam
that the 45 degree cut tapes do. Correct me if I am wrong.
Ron
On 10/8/2012 3:22 PM, Reiff Lorenz wrote:
>
> Here's a photo of the thin 90-degree bid from Aircraft Spruce and the
> thick 45-degree BID from West Marine.
>
> Description: C:\Users\Reiff\Pictures\From RLPhone\Camera
> roll\WP_000313.jpg
>
> *From:*reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]
> *On Behalf Of *Reiff Lorenz
> *Sent:* Saturday, October 06, 2012 10:08 AM
> *To:* Velocity Aircraft Owners and Builders list
> *Subject:* Re: REFLECTOR: Epoxy question
>
> Do you have any pictures of the bid tape?
>
> Ron,
>
> It is: West Marine #727 (Episize Biaxial Tape, 4" x 20 yard roll.)
> Here is the link to the part on West Marine's site.
>
> http://www.westmarine.com/webapp/wcs/stores/servlet/ProductDisplay?productId=14880&catalogId=10001&langId=-1&storeId=11151&storeNum=50218&subdeptNum=50219&classNum=50226
>
> (If the above link is broken, try: http://goo.gl/iHedd )
>
> It is 50% heavier than the stock Velocity BID, so where the plans call
> for 5 layers of (woven 8.9oz) BID, I've been using 3 (straight 15oz)
> plies of this. It doesn't stretch or contort as much as standard BID
> (due to the non-structural, in-line stitching that holds it together),
> which is great when trying to place a long strip in position, but be
> aware that it won't conform to tight corners very well.
>
> West has free shipping on orders of $99 or more.
>
> For cosmetic applications, I've been using the Aircraft Spruce
> fiberglass tape. It's lighter that Velocity BID and it's laid out at
> 90-degrees, so it's not as strong. Good for keeping seams from
> cracking or as a smooth layer of glass on top of a structural layup.
>
> http://www.aircraftspruce.com/catalog/cmpages/etapes.php
>
> While you're there, get some peel-ply tape, too. So much easier than
> trying to cut 4-inch strips from a long roll. I got this from another
> builder and have used it almost exclusively.
>
> http://www.aircraftspruce.com/catalog/cmpages/peelply.php
>
> DISCLAIMER: I'm not a fiberglass expert. Most of my fiberglass work at
> this stage consists of fairings and flanges. I have no qualms about
> using the West fiberglass for things like holding on canard tips or
> making cowl flanges. I'd check with Velocity HQ or an engineer,
> though, before I used it in load-supporting applications like bulkhead
> reinforcements.
>
> Hope this helps!
>
> *Reiff Lorenz, Dayton, OH*
>
> Velocity XL-RG, 37% complete
>
> Currently working on: Creating a large-radius wing root fairing on the
> engine cowl.
>
> *The Velocity Builders' Virtual Hangar is available 24/7 at:*
>
> _https://liveconferencepro.com/guest/loginguest.php?id=86a48563bb517ade0abf1a7ee1f38e65_
>
> *From:*reflector-bounces at tvbf.org <mailto:reflector-bounces at tvbf.org>
> [mailto:reflector-bounces at tvbf.org]
> <mailto:[mailto:reflector-bounces at tvbf.org]> *On Behalf Of *Ron N
> VelocityXLFG
> *Sent:* Thursday, October 04, 2012 12:23 PM
> *To:* Velocity Aircraft Owners and Builders list
> *Subject:* Re: REFLECTOR: Epoxy question
>
> Do you have any pictures of the bid tape. And a part number . Sorry I
> can not picture what you are using.
> I would love to not have to cut bid tapes
>
> Ron
>
> On 10/3/2012 9:54 PM, Reiff Lorenz wrote:
>
> I'm now using West exclusively. I use the fast hardener and mix it
> in small batches. Layups gel within an hour. If I hit it with a
> heat gun after it has gelled (and the exotherm danger has passed)
> it is fully set and sandable within a few hours. It keeps me
> building instead of waiting. I switch to the slow hardener for
> larger batches or projects that I don't expect to work on again in
> the next for 24 hours.
>
> While we're talking about West products, their 4-inch 45-degree
> BID tape saves a ton of time cutting tape strips! It's 50% heavier
> than the 8.9 ounce BID that the kit calls for and its fibers are
> not woven ( they're held in place with a non-structural thread,
> like triax), so they are supposedly even stronger than woven BID.
> Anyone else using this?
>
> *Reiff Lorenz, Dayton, OH*
>
> Velocity XL-RG, 37% complete
>
> Currently working on: Fitting cowl to wings.
>
> *The Velocity Builders' Virtual Hangar is available 24/7 at:*
>
> _https://liveconferencepro.com/guest/loginguest.php?id=86a48563bb517ade0abf1a7ee1f38e65_
>
> *From:*reflector-bounces at tvbf.org
> <mailto:reflector-bounces at tvbf.org>
> [mailto:reflector-bounces at tvbf.org] *On Behalf Of *Lou Stedman
> *Sent:* Wednesday, October 03, 2012 6:04 PM
> *To:* Canard Aviators; Velocity Reflector
> *Subject:* REFLECTOR: Epoxy question
>
> I got a lot of different answers to my question about epoxy from
> everyone. They were much appreciated. Today I called Velocity and
> asked them. They told me that I used the wrong hardener, which you
> all told me. They said that I could use the West as long as I used
> the slower hardener. In my case it is the 206. He did say that the
> 209 would be better but if I mixed more micros, they would take
> away some of the heat. He also suggested that instead of trying to
> fill the entire void which was created, that I epoxy in close cell
> foam to fill the original area. He told me to let it dry using the
> 206 and the next day I can cut a slot just a bit larger the the
> horn and epoxy it into place. The last thing he suggested was to
> put one layer of bid over the repaired area, sand , and paint.
>
> So today I followed his instructions and had no problem. Tomorrow
> I will cut my slot and epoxy in the control horn. So not others
> know the "right" way to do this repair. Thanks again for all of
> your comments. It helped a lot.
>
> Lou Stedman
> Velocity SEFG
> N7044Q
> Olean, NY
>
>
>
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