On the hull construction of the P-Cat:
I installed a pair of 5" inspection ports in mine just forward of the deck. All manner of humidity wafted out of the holes after I cut them. (24 hours later they were bone dry.)
I stuck a camera down into the hull and took pictures:
The inside is filled halfway with closed cell foam blocks. The blocks hadn't absorbed any water, and were still quite light. The fiberglass was moist to the touch until it dried out.
This is a second set of photos stitched into a composite, looking aft:
In the upper quarter you can see the cavity of the forward beam arcing up and to the right. In the lower quarter you can see the foam blocks extending aft underneath the foot wells where the daggerboard trunks go.
As far as I can tell the boat is solid fiberglass. No foam, no balsa. That might be different under the hard deck, but I haven't managed to get a camera in there yet. There are reinforcing ribs in strategic places (visible in both photos) that appear to be made of hollow fiberglass that had been draped over some sort of mold.
There are also some reinforcing crossbeams down inside the hulls. The upper photo shows one of these in the foreground, with foam nestled beneath it. That's not burlap. Just moldy fiberglass. It's hard as a rock.
All the lighting for these was sunlight shining through the fiberglass. No artificial lighting was used. So the colors are characteristic of the fiberglass the light is passing through. The lower parts of the hull are a different color from the upper deck, which has more of a green tinge. The deck has an intermediate gel coat layer that looks like a funky green. I'm pretty sure this is what's causing the color of the light passing through the glass on the deck.
You can see this green gel coat layer in this photo where I was filling in a bunch of old screw holes:
Not sure why the deck was coated different from the rest of the boat. In any case the hull is all one color now, upper and lower halves alike, except for the stripe at the waterline that all P-Cats appear to have. In my case it's red.
Tom
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Tom Benedict
Island of Hawaii
P-Cat 18 / Sail# 361 / HA 7633 H / "Smilodon"
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