Welcome to Sailnet, Steve.
Airex was a pretty common foam core material for boats, and several production manufacturers used it. It is still in use today and is still one of the preferred foams, especially for the hulls of multihulls. CE Ryder used it in the Southern Cross series of boats, among others.
Bonding the foam to the glass skins is a bit of a problem in foam-core construction, since the foam doesn't wick resin up like end-grain balsa generally does. Usually a thickened paste or putty is used to help bind the foam to the glass laminate skin.
As for the quality of the airex and resin, it would really depend on the person doing the building... they could have gotten materials from any number of sources, some of which would be as good, if not better, than what production builders were using, and some of which were far less suitable. It is hard to say one way or another. The fact that the boat is 41 years old, and still floating says a good deal about it though IMHO.
I'd highly recommend you read the POST
in my signature to help you get the most out of your time here. It has tips on searching sailnet, writing a good post, etc.. I'd also recommend you read the Boat Inspection Trip Tips
thread I started.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
If you're new to the Sailnet Forums... please read this To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Still—DON'T READ THAT POST AGAIN.