REFLECTOR: Wing Delamination question

[Jeffrey Clough]

I think I would still use a thin warmed microslurry..that is what is on
the blue foam originally to adhere the fiberglass to the cores. Putting
weight on it will push it to all of the corners before oozing out.  I
would still WARM the bubble first too...maybe saying 'heat' implied too
much....but the bubble already is an 'expanded' area of fiberglass, so I
would warm it to better conform to the surface I wanted it to adhere
to...for less 'recontouring' afterward (Less fiberglass removal)
.....this is what I did to small area bubbles....one further thing I
didn't mention before is to put a layer of foam rubber on the plastic
before weighting (particularly with large bubbles) to get the best
conform of the fiberglas bubble to the surface contour.....obviously you
would not heat the weighting board in this case..
Obviously there are several ways to skin cats.....good thing.
G'Luck
Jeff Clough

Richard Riley wrote:

> At 11:53 AM 3/5/2006, you wrote:
>
>> Is this a good idea?  Won't sanding/recontouring be removing the
>> fiberglass layup?  Won't pure epoxy 'eat' blue foam?
>
>
> No.  Polyester resin will eat blue foam.  Epoxy won't.
>
>>  (Do fastbuild wings
>> have foam cores?)  I think I would warm the blister with a heatgun first
>> to soften the fiberglass
>
>
> No need.  And you might damage the foam core more with the heat.  You
> DON'T want to get blue foam over 150 degrees, it will swell and then
> you have a BAD problem to deal with.
>
>> then I would inject (through a short large bore
>> needle...18 guage or 16 guage) a slurry of warmed (to make it easier to
>> inject and to keep the layup warm) microbubbles/epoxy
>
>
> Don't mix the epoxy with micro, just use straight, slightly warmed,
> long pot life epoxy.  Personally, I'd use WEST 105/206.
>
>> then lay some
>> plastic on the area (saran wrap or equiv) then weight it down with a
>> warmed board and weights/sandbags some of the material will come
>> squishing out of your bottom edge holes....cover the area with duct tape
>> to aid in clean up.....
>> Anyone else?
>> Jeff Clough
>
>
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