REFLECTOR: Epoxy question

[Robert Wood]

The upper roll is "fine bid" not the standard bid used for normal construction. Fine bid is for small, delicate layups like in the recesses for rudders in the winglets where a delicate surface but not great strength may be needed.


Bob Wood

Sent from my iPad

On Oct 8, 2012, at 5:01 PM, Ron N VelocityXLFG <velocityxl at fastmail.fm> wrote:

> 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.
>>  
>> <mime-attachment.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] 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
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