Sunday, March 3, 2013

Bottom's up

OSHA came by and insisted we post proper signage. Not just slow children. SLOW children.

Meanwhile the SLOW children got the hull faired and sanded, ready for its firm sexy black bottom.

Dennis came by to aid in the massive glassing and we launched into the mix. It's a three layer bottom: a layer of 25oz biaxial glass with 3/4oz mat for excellent adhesion; a layer of the new miracle synthetic Innegra, and a top layer of 10oz glass. Saturated with about two gallons of Resin Research 2040, the resilient epoxy. Just what is Additive F? We still don't know.


As long as you don't do it all day every day, glassing can be fun. Well, certainly more fun than sanding glass for hours on end.

Massaging in the corners.

And a flow coat with graphite so she'll slide of those pesky rocks better. Thar she be.


  1. As a redhead, I've been watching this build with some interest. I'm curious about the rationale behind Innegra. Really, I'm curious about the beefiness of the whole hull. It seems like a lot more 'glass than you've used in other builds on this blog.

    Godspeed in wrapping her up. She sure is pretty.


  2. "an exceptional combination of high toughness and low weight. Produced
    at relatively high throughputs from commodity polymers, the cost/performance benefits
    of the yarn are substantial when it is used in tough, impact resistant composites where
    glass, carbon and aramid fibers are traditionally used."

  3. Most of my boats are historic replicas, designed to act, row, and crash like the originals. This one is for Grand Canyon use with a load, so it is designed for impact. It's always a dance between strength and weight. Strong enough to take a good hit, or light enough to miss the damned rock I the first place.

    Grand Canyon dories can carry loads of a ton, plus water-loading, and hit boulders at speeds of ten or fifteen miles an hour. So it is worth taking a stab at extreme strength.

    The Innegra, as I understand it, should add a good deal of shock absorption to the layup. In the tests I have done with similar materials (Xynole on the last builds) it does seem to be worth its weight. (see above post)