Steve's PH22

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Matt Gent
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Re: Steve's PH22

Post by Matt Gent »

fallguy1000 wrote: Mon Sep 13, 2021 3:57 pm
I'll try to avoid extended debate and this is not a critique of your work Matt, but the problem with the a500 core is the interface between the bottom or top deck and the sides.
Yeah I wasn't getting into design/fab details at all. My applications (forgot about the 3rd one under way, will make a quick thread on that) for a500 were all on running surfaces in molded production boats. The core is laminated onto the outer skin to stiffen the large panels. It is not in position to take compressive loads, which are borne by the hull shape (keel pad, or strakes, or tunnel edges) or stringers in all glass areas. Edges of the foam were tapered down or butted against stiff vertical members with glass fillets.

My point was simply that the expensive stack of H80 already purchased is not optimum and maybe not sufficient for the hull surfaces.

fallguy1000
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Re: Steve's PH22

Post by fallguy1000 »

You are for sure a class act Matt. Needed no reply.

Here are a few pics for the OP of honeycomb work. He asked privately about raw edge management is all. I like he is thinkin ahead. I used scraps for this edgefill, so the abc is so I remember when the glue is ready! Look close and you can see it is lightly clamped. I did add weight on panel corners to keep vertical alignment, but it is never perfect and requires some sanding or filling later.

The aluminum post holes were after the fact. Drilled to 3/4" and refilled for 1/4" bolts. Don't be fooled by those nuts; there is a carbon backer going there; just needs paint first!
DC3769FE-2491-4D50-A5E8-766A8458A83F.jpeg
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My boat build is here -------->

viewtopic.php?f=12&t=62495

fallguy1000
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Re: Steve's PH22

Post by fallguy1000 »

My inserts were almost too narrow at 1.25", too. Try to avoid skimping.

Some people purposely leave inserts high or low to find them later. I am on the hardtop.

Order enough coosa for the transom and for cleats and i nserts. Benchtops in 1/2-3/4" coosa are wise as is the entire gunwhale.

Used 3/4" marine ply in a benchtop that filled with water here in the yrd and it broke my laminate and messed up my paintjob

Freight is so costly, make sure to get plenty of hd core for inserts, transom, gutters even. I made gutters from aquaplas. There are different weights of hd core. 26# for transom, 20# for benchtops and screwholds, 12# for in hull load inserts or as spec'd by JM.

I had to buy more core along the way fir this build...freight is a bugger. I expect you'll experience some of same. Make sure to use a 25% waste factor. Yes you can buuld up core and use small pueces like I showed, but damnit if a guy misses stuff..
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fallguy1000
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Re: Steve's PH22

Post by fallguy1000 »

In a foam boat, you don't really put many screws into the hull.

For one; they hold poorly in 4-5# density. For another why risk it? So, you use standoffs ir cleats. Yeah, frim scrap, but only if you have some.

These are 1.5" cleats and a 1/2" aquaplas standoff.

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OneWayTraffic
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Re: Steve's PH22

Post by OneWayTraffic »

I'm not sure I understand what you mean by standoffs on cleats. Is it that instead of say screwing a wiring board or transducer into the hull, you screw it into a foam/glass or ply pad that is glued to the hull?

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BarraMan
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Re: Steve's PH22

Post by BarraMan »

Its interesting to read a thread .................. and have absolutely no idea what anyone is talking about ! 8O

fallguy1000
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Re: Steve's PH22

Post by fallguy1000 »

OneWayTraffic wrote: Wed Sep 15, 2021 6:47 pm I'm not sure I understand what you mean by standoffs on cleats. Is it that instead of say screwing a wiring board or transducer into the hull, you screw it into a foam/glass or ply pad that is glued to the hull?
Yes. I use weldmount adhesive. It is spendy, but about 30 minutes after gluing you can start mounting to the standoffs

Cleats are just a place to screw to that is not the honeycomb. For example, a center console could be attached with screws or bolts. This would make it easier to work on inside the garage in summer or removable, in my case.

Steve asked me about using honeycomb is all. So I wrote some stuff about how to use honeycomb.
My boat build is here -------->

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fallguy1000
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Re: Steve's PH22

Post by fallguy1000 »

6BB42731-27F9-4EDA-A40D-2087F8343C28.jpeg
This standoff is just a scrap piece of 1/2" aquaplas. It won't rot or suck water. It may mildew.

The hull thickness here is about 5/8", but a 1/2" screw is nervewracking, so the aquaplas makes it an inch thick hull and better screwholding in say a 20-26# density core than the 4# core..

4# hull core does not hold screws really...they can pull or lay over easily,,
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jonnymac
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Re: Steve's PH22

Post by jonnymac »

BarraMan wrote: Wed Sep 15, 2021 7:01 pm Its interesting to read a thread .................. and have absolutely no idea what anyone is talking about ! 8O
there are like 7 parallel conversations 🤣 also. I hope steve starts a new thread for his build. I hope he still documents it here. I’m in with the 🍿

fallguy1000
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Re: Steve's PH22

Post by fallguy1000 »

If Steve follows the specs; it'll be THE coolest build ever.
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