The only things I occasionally like in Sport Aviation is the Experimenter
section in the back.  I used to subscribe to  Experimenter, their
publication for homebuilders, until they discontinued it.

Sport Aviation seems to be mostly about restoring esoteric warbirds and
giving plane rides to little kids (Both of these of course are worthwhile
pursuits but I don't have a warbird or kids).

Mike Taglieri

On Sun, Feb 24, 2019, 3:28 PM Mark Langford via KRnet <krnet@list.krnet.org>
wrote:

> A recurring question on KRnet is how to glue urethane foam to urethane
> foam without a difficult-to-sand "hard" line resulting between the foam
> layers.  I was reading the March 2019 KitPlanes and there's a  pretty
> impressive four page story on using urethane glue and "lightweight
> spackling" in a mixture of 10:5 (by weight) for exactly that purpose.
> He says it's 60% as strong as the foam.   I think he was using much
> stronger (in compression) foam than our foam, and given that we mainly
> use the foam as a form to lay up fiberglass on as an air surface, I
> would think it would work fine for our purposes.  He says it sands just
> like the foam.
>
> He tested both Gorilla Glue and Elmer's urethane glue and
> Sherwin-Williams Shrink-Free Spackling.  You can vary the
> mixuture....the more spackling, the easier it is to sand, and the more
> glue, the stronger the joint is, if extra strength is really needed (but
> now it's harder to sand again).
>
> If you're not subscribing to KitPlanes magazine, you've been missing a
> lot for the last few years.  The new editor is a serious breath of fresh
> air, and has lit the place on "technical fire"!  It's easily twice or
> three times as good as before.  I read almost every page of every  issue
> of Kitplanes as I receive it.  I have a huge pile of Sport Aviation mags
> that I've never opened, by comparison.  Somebody please know if there
> are any good articles in there....
> --
> Mark Langford
> m...@n56ml.com
> http://www.n56ml.com
>
>
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